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937e6c5241d30460ef620b2c67df37209259a730
swift-mirror/lib/AST/Module.cpp
Alexis Laferrière 5a49e34426 Serialization: Error on xref to implementation-only dependencies 
Introduce a last resort check reporting references to
implementation-only dependencies that would appear in the generated
swiftmodule. This check is applied at serialization, long after
exportability checking applied at typechecking. It should act as a back
stop to references missed by typechecking or @_implementationOnly decls
that should have been skipped.

This check is gated behind CheckImplementationOnlyStrict and should be
used with embedded only.

rdar://160697599
2025-11-11 13:03:16 -08:00

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144 KiB
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//===--- Module.cpp - Swift Language Module Implementation ----------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// This file implements the Module class and subclasses.
//
//===----------------------------------------------------------------------===//
#include "swift/AST/Module.h"
#include "swift/AST/ASTContext.h"
#include "swift/AST/ASTMangler.h"
#include "swift/AST/ASTPrinter.h"
#include "swift/AST/ASTWalker.h"
#include "swift/AST/AccessScope.h"
#include "swift/AST/AttrKind.h"
#include "swift/AST/Builtins.h"
#include "swift/AST/ClangModuleLoader.h"
#include "swift/AST/DiagnosticsSema.h"
#include "swift/AST/ExistentialLayout.h"
#include "swift/AST/FileUnit.h"
#include "swift/AST/GenericEnvironment.h"
#include "swift/AST/Import.h"
#include "swift/AST/ImportCache.h"
#include "swift/AST/LazyResolver.h"
#include "swift/AST/LinkLibrary.h"
#include "swift/AST/MacroDefinition.h"
#include "swift/AST/ModuleLoader.h"
#include "swift/AST/NameLookup.h"
#include "swift/AST/NameLookupRequests.h"
#include "swift/AST/PackConformance.h"
#include "swift/AST/ParseRequests.h"
#include "swift/AST/PrettyStackTrace.h"
#include "swift/AST/PrintOptions.h"
#include "swift/AST/ProtocolConformance.h"
#include "swift/AST/SourceFile.h"
#include "swift/AST/SourceFileExtras.h"
#include "swift/AST/SynthesizedFileUnit.h"
#include "swift/AST/Type.h"
#include "swift/AST/TypeCheckRequests.h"
#include "swift/Basic/Assertions.h"
#include "swift/Basic/Compiler.h"
#include "swift/Basic/Defer.h"
#include "swift/Basic/SourceManager.h"
#include "swift/Basic/Statistic.h"
#include "swift/Basic/StringExtras.h"
#include "swift/Demangling/ManglingMacros.h"
#include "swift/Parse/Token.h"
#include "swift/Strings.h"
#include "clang/Basic/Module.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/TinyPtrVector.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/MD5.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/SaveAndRestore.h"
#include "llvm/Support/YAMLTraits.h"
#include "llvm/Support/raw_ostream.h"
#include <optional>
using namespace swift;
static_assert(IsTriviallyDestructible<FileUnit>::value,
"FileUnits are BumpPtrAllocated; the d'tor may not be called");
static_assert(IsTriviallyDestructible<LoadedFile>::value,
"LoadedFiles are BumpPtrAllocated; the d'tor may not be called");
//===----------------------------------------------------------------------===//
// Builtin Module Name lookup
//===----------------------------------------------------------------------===//
class BuiltinUnit::LookupCache {
/// The cache of identifiers we've already looked up. We use a
/// single hashtable for both types and values as a minor
/// optimization; this prevents us from having both a builtin type
/// and a builtin value with the same name, but that's okay.
llvm::DenseMap<Identifier, ValueDecl*> Cache;
public:
void lookupValue(Identifier Name, NLKind LookupKind, const BuiltinUnit &M,
SmallVectorImpl<ValueDecl*> &Result);
};
BuiltinUnit::LookupCache &BuiltinUnit::getCache() const {
// FIXME: This leaks. Sticking this into ASTContext isn't enough because then
// the DenseMap will leak.
if (!Cache)
const_cast<BuiltinUnit *>(this)->Cache = std::make_unique<LookupCache>();
return *Cache;
}
void BuiltinUnit::LookupCache::lookupValue(
Identifier Name, NLKind LookupKind, const BuiltinUnit &M,
SmallVectorImpl<ValueDecl*> &Result) {
ValueDecl *&Entry = Cache[Name];
ASTContext &Ctx = M.getParentModule()->getASTContext();
if (!Entry) {
if (Type Ty = getBuiltinType(Ctx, Name.str())) {
auto *TAD = new (Ctx) TypeAliasDecl(SourceLoc(), SourceLoc(),
Name, SourceLoc(),
/*genericparams*/nullptr,
const_cast<BuiltinUnit*>(&M));
TAD->setUnderlyingType(Ty);
TAD->setAccess(AccessLevel::Public);
Entry = TAD;
}
}
if (!Entry)
Entry = getBuiltinValueDecl(Ctx, Name);
if (Entry)
Result.push_back(Entry);
}
// Out-of-line because std::unique_ptr wants LookupCache to be complete.
BuiltinUnit::BuiltinUnit(ModuleDecl &M)
: FileUnit(FileUnitKind::Builtin, M) {
M.getASTContext().addDestructorCleanup(*this);
}
//===----------------------------------------------------------------------===//
// Normal Module Name Lookup
//===----------------------------------------------------------------------===//
SourceFile::~SourceFile() = default;
/// A utility for caching global lookups into SourceFiles and modules of
/// SourceFiles. This is used for lookup of top-level declarations, as well
/// as operator lookup (which looks into types) and AnyObject dynamic lookup
/// (which looks at all class members).
class swift::SourceLookupCache {
/// A lookup map for value decls. When declarations are added they are added
/// under all variants of the name they can be found under.
class ValueDeclMap {
llvm::DenseMap<DeclName, TinyPtrVector<ValueDecl *>> Members;
public:
void add(ValueDecl *VD) {
if (!VD->hasName()) return;
VD->getName().addToLookupTable(Members, VD);
auto abiRole = ABIRoleInfo(VD);
if (!abiRole.providesABI() && abiRole.getCounterpart())
abiRole.getCounterpart()->getName()
.addToLookupTable(Members, abiRole.getCounterpart());
}
void clear() {
Members.shrink_and_clear();
}
decltype(Members)::const_iterator begin() const { return Members.begin(); }
decltype(Members)::const_iterator end() const { return Members.end(); }
decltype(Members)::const_iterator find(DeclName Name) const {
return Members.find(Name);
}
};
ValueDeclMap TopLevelValues;
ValueDeclMap ClassMembers;
bool MemberCachePopulated = false;
llvm::SmallVector<AbstractFunctionDecl *, 0> CustomDerivatives;
DeclName UniqueMacroNamePlaceholder;
template<typename T>
using OperatorMap = llvm::DenseMap<Identifier, TinyPtrVector<T *>>;
OperatorMap<OperatorDecl> Operators;
OperatorMap<PrecedenceGroupDecl> PrecedenceGroups;
template <typename Range>
void addToUnqualifiedLookupCache(Range decls, bool onlyOperators,
bool onlyDerivatives);
template<typename Range>
void addToMemberCache(Range decls);
using AuxiliaryDeclMap = llvm::DenseMap<DeclName, TinyPtrVector<MissingDecl *>>;
AuxiliaryDeclMap TopLevelAuxiliaryDecls;
/// Top-level macros that produce arbitrary names.
SmallVector<MissingDecl *, 4> TopLevelArbitraryMacros;
SmallVector<llvm::PointerUnion<Decl *, MacroExpansionExpr *>, 4>
MayHaveAuxiliaryDecls;
void populateAuxiliaryDeclCache();
SourceLookupCache(ASTContext &ctx);
public:
SourceLookupCache(const SourceFile &SF);
SourceLookupCache(const ModuleDecl &Mod);
void lookupValue(DeclName Name, NLKind LookupKind,
OptionSet<ModuleLookupFlags> Flags,
SmallVectorImpl<ValueDecl*> &Result);
/// Retrieves all the operator decls. The order of the results is not
/// guaranteed to be meaningful.
void getOperatorDecls(SmallVectorImpl<OperatorDecl *> &results);
/// Retrieves all the precedence groups. The order of the results is not
/// guaranteed to be meaningful.
void getPrecedenceGroups(SmallVectorImpl<PrecedenceGroupDecl *> &results);
/// Retrieves all the function decls marked as @derivative. The order of the
/// results is not guaranteed to be meaningful.
llvm::SmallVector<AbstractFunctionDecl *, 0> getCustomDerivativeDecls();
/// Look up an operator declaration.
///
/// \param name The operator name ("+", ">>", etc.)
/// \param fixity The fixity of the operator (infix, prefix or postfix).
void lookupOperator(Identifier name, OperatorFixity fixity,
TinyPtrVector<OperatorDecl *> &results);
/// Look up a precedence group.
///
/// \param name The operator name ("+", ">>", etc.)
void lookupPrecedenceGroup(Identifier name,
TinyPtrVector<PrecedenceGroupDecl *> &results);
void lookupVisibleDecls(ImportPath::Access AccessPath,
VisibleDeclConsumer &Consumer,
NLKind LookupKind);
void populateMemberCache(const SourceFile &SF);
void populateMemberCache(const ModuleDecl &Mod);
void lookupClassMembers(ImportPath::Access AccessPath,
VisibleDeclConsumer &consumer);
void lookupClassMember(ImportPath::Access accessPath,
DeclName name,
SmallVectorImpl<ValueDecl*> &results);
SmallVector<ValueDecl *, 0> AllVisibleValues;
};
SourceLookupCache &SourceFile::getCache() const {
if (!Cache) {
const_cast<SourceFile *>(this)->Cache =
std::make_unique<SourceLookupCache>(*this);
}
return *Cache;
}
static Expr *getAsExpr(Decl *decl) { return nullptr; }
static Decl *getAsDecl(Decl *decl) { return decl; }
static Expr *getAsExpr(ASTNode node) { return node.dyn_cast<Expr *>(); }
static Decl *getAsDecl(ASTNode node) { return node.dyn_cast<Decl *>(); }
template <typename Range>
void SourceLookupCache::addToUnqualifiedLookupCache(Range items,
bool onlyOperators,
bool onlyDerivatives) {
for (auto item : items) {
// In script mode, we'll see macro expansion expressions for freestanding
// macros.
if (Expr *E = getAsExpr(item)) {
if (auto MEE = dyn_cast<MacroExpansionExpr>(E)) {
if (!onlyOperators)
MayHaveAuxiliaryDecls.push_back(MEE);
}
continue;
}
Decl *D = getAsDecl(item);
if (!D)
continue;
if (auto *VD = dyn_cast<ValueDecl>(D)) {
auto getDerivative = [VD]() -> AbstractFunctionDecl * {
if (auto *AFD = dyn_cast<AbstractFunctionDecl>(VD))
if (AFD->getAttrs().hasAttribute<DerivativeAttr>())
return AFD;
return nullptr;
};
if (onlyOperators && VD->isOperator())
TopLevelValues.add(VD);
if (onlyDerivatives)
if (AbstractFunctionDecl *AFD = getDerivative())
CustomDerivatives.push_back(AFD);
if (!onlyOperators && !onlyDerivatives && VD->hasName()) {
TopLevelValues.add(VD);
if (VD->getAttrs().hasAttribute<CustomAttr>())
MayHaveAuxiliaryDecls.push_back(VD);
if (AbstractFunctionDecl *AFD = getDerivative())
CustomDerivatives.push_back(AFD);
}
}
if (auto *NTD = dyn_cast<NominalTypeDecl>(D)) {
bool onlyOperatorsArg =
(!NTD->hasUnparsedMembers() || NTD->maybeHasOperatorDeclarations());
bool onlyDerivativesArg =
(!NTD->hasUnparsedMembers() || NTD->maybeHasDerivativeDeclarations());
if (onlyOperatorsArg || onlyDerivativesArg) {
addToUnqualifiedLookupCache(NTD->getMembers(), onlyOperatorsArg,
onlyDerivativesArg);
}
}
if (auto *ED = dyn_cast<ExtensionDecl>(D)) {
// Avoid populating the cache with the members of invalid extension
// declarations. These members can be used to point validation inside of
// a malformed context.
if (ED->isInvalid()) continue;
if (ED->getAttrs().hasAttribute<CustomAttr>()) {
MayHaveAuxiliaryDecls.push_back(ED);
}
bool onlyOperatorsArg =
(!ED->hasUnparsedMembers() || ED->maybeHasOperatorDeclarations());
bool onlyDerivativesArg =
(!ED->hasUnparsedMembers() || ED->maybeHasDerivativeDeclarations());
if (onlyOperatorsArg || onlyDerivativesArg) {
addToUnqualifiedLookupCache(ED->getMembers(), onlyOperatorsArg,
onlyDerivativesArg);
}
}
if (auto *OD = dyn_cast<OperatorDecl>(D))
Operators[OD->getName()].push_back(OD);
else if (auto *PG = dyn_cast<PrecedenceGroupDecl>(D))
PrecedenceGroups[PG->getName()].push_back(PG);
else if (auto *MED = dyn_cast<MacroExpansionDecl>(D)) {
if (!onlyOperators)
MayHaveAuxiliaryDecls.push_back(MED);
} else if (auto TLCD = dyn_cast<TopLevelCodeDecl>(D)) {
if (auto body = TLCD->getBody()){
addToUnqualifiedLookupCache(body->getElements(), onlyOperators,
onlyDerivatives);
}
}
}
}
void SourceLookupCache::populateMemberCache(const SourceFile &SF) {
if (MemberCachePopulated)
return;
FrontendStatsTracer tracer(SF.getASTContext().Stats,
"populate-source-file-class-member-cache");
addToMemberCache(SF.getTopLevelDecls());
MemberCachePopulated = true;
}
void SourceLookupCache::populateMemberCache(const ModuleDecl &Mod) {
if (MemberCachePopulated)
return;
FrontendStatsTracer tracer(Mod.getASTContext().Stats,
"populate-module-class-member-cache");
for (const FileUnit *file : Mod.getFiles()) {
assert(isa<SourceFile>(file) ||
isa<SynthesizedFileUnit>(file));
SmallVector<Decl *, 8> decls;
file->getTopLevelDecls(decls);
addToMemberCache(decls);
}
MemberCachePopulated = true;
}
template <typename Range>
void SourceLookupCache::addToMemberCache(Range decls) {
for (Decl *D : decls) {
if (auto *NTD = dyn_cast<NominalTypeDecl>(D)) {
if (!NTD->hasUnparsedMembers() ||
NTD->maybeHasNestedClassDeclarations() ||
NTD->mayContainMembersAccessedByDynamicLookup())
addToMemberCache(NTD->getMembers());
} else if (auto *ED = dyn_cast<ExtensionDecl>(D)) {
if (!ED->hasUnparsedMembers() ||
ED->maybeHasNestedClassDeclarations() ||
ED->mayContainMembersAccessedByDynamicLookup())
addToMemberCache(ED->getMembers());
} else if (auto *VD = dyn_cast<ValueDecl>(D)) {
if (VD->canBeAccessedByDynamicLookup())
ClassMembers.add(VD);
}
}
}
void SourceLookupCache::populateAuxiliaryDeclCache() {
using MacroRef = llvm::PointerUnion<FreestandingMacroExpansion *, CustomAttr *>;
for (auto item : MayHaveAuxiliaryDecls) {
TopLevelCodeDecl *topLevelCodeDecl = nullptr;
// Gather macro-introduced peer names.
llvm::SmallDenseMap<MacroRef, llvm::SmallVector<DeclName, 2>>
introducedNames;
/// Introduce names for a freestanding macro.
auto introduceNamesForFreestandingMacro =
[&](FreestandingMacroExpansion *macroRef, Decl *decl, MacroRole role) {
bool introducesArbitraryNames = false;
namelookup::forEachPotentialResolvedMacro(
decl->getDeclContext()->getModuleScopeContext(),
macroRef->getMacroName(), role,
[&](MacroDecl *macro, const MacroRoleAttr *roleAttr) {
// First check for arbitrary names.
if (roleAttr->hasNameKind(MacroIntroducedDeclNameKind::Arbitrary)) {
introducesArbitraryNames = true;
}
macro->getIntroducedNames(role,
/*attachedTo*/ nullptr,
introducedNames[macroRef]);
});
return introducesArbitraryNames;
};
// Handle macro expansion expressions, which show up in when we have
// freestanding macros in "script" mode.
if (auto expr = item.dyn_cast<MacroExpansionExpr *>()) {
topLevelCodeDecl = dyn_cast<TopLevelCodeDecl>(expr->getDeclContext());
if (topLevelCodeDecl) {
bool introducesArbitraryNames = false;
if (introduceNamesForFreestandingMacro(
expr, topLevelCodeDecl, MacroRole::Declaration))
introducesArbitraryNames = true;
if (introduceNamesForFreestandingMacro(
expr, topLevelCodeDecl, MacroRole::CodeItem))
introducesArbitraryNames = true;
// Record this macro if it introduces arbitrary names.
if (introducesArbitraryNames) {
TopLevelArbitraryMacros.push_back(
MissingDecl::forUnexpandedMacro(expr, topLevelCodeDecl));
}
}
}
auto *decl = item.dyn_cast<Decl *>();
if (decl) {
// This code deliberately avoids `forEachAttachedMacro`, because it
// will perform overload resolution and possibly invoke unqualified
// lookup for macro arguments, which will recursively populate the
// auxiliary decl cache and cause request cycles.
//
// We do not need a fully resolved macro until expansion. Instead, we
// conservatively consider peer names for all macro declarations with a
// custom attribute name. Unqualified lookup for that name will later
// invoke expansion of the macro, and will yield no results if the resolved
// macro does not produce the requested name, so the only impact is possibly
// expanding earlier than needed / unnecessarily looking in the top-level
// auxiliary decl cache.
for (auto attrConst : decl->getAttrs().getAttributes<CustomAttr>()) {
auto *attr = const_cast<CustomAttr *>(attrConst);
UnresolvedMacroReference macroRef(attr);
bool introducesArbitraryNames = false;
namelookup::forEachPotentialResolvedMacro(
decl->getDeclContext()->getModuleScopeContext(),
macroRef.getMacroName(), MacroRole::Peer,
[&](MacroDecl *macro, const MacroRoleAttr *roleAttr) {
// First check for arbitrary names.
if (roleAttr->hasNameKind(
MacroIntroducedDeclNameKind::Arbitrary)) {
introducesArbitraryNames = true;
}
macro->getIntroducedNames(MacroRole::Peer,
dyn_cast<ValueDecl>(decl),
introducedNames[attr]);
});
// Record this macro where appropriate.
if (introducesArbitraryNames)
TopLevelArbitraryMacros.push_back(
MissingDecl::forUnexpandedMacro(attr, decl));
}
}
if (auto *med = dyn_cast_or_null<MacroExpansionDecl>(decl)) {
bool introducesArbitraryNames =
introduceNamesForFreestandingMacro(med, decl, MacroRole::Declaration);
// Note whether this macro produces arbitrary names.
if (introducesArbitraryNames)
TopLevelArbitraryMacros.push_back(MissingDecl::forUnexpandedMacro(med, decl));
}
// Add macro-introduced names to the top-level auxiliary decl cache as
// unexpanded decls represented by a MissingDecl.
auto anchorDecl = decl ? decl : topLevelCodeDecl;
for (auto macroNames : introducedNames) {
auto macroRef = macroNames.getFirst();
for (auto name : macroNames.getSecond()) {
auto *placeholder = MissingDecl::forUnexpandedMacro(macroRef, anchorDecl);
name.addToLookupTable(TopLevelAuxiliaryDecls, placeholder);
}
}
}
MayHaveAuxiliaryDecls.clear();
}
SourceLookupCache::SourceLookupCache(ASTContext &ctx)
: UniqueMacroNamePlaceholder(MacroDecl::getUniqueNamePlaceholder(ctx)) { }
/// Populate our cache on the first name lookup.
SourceLookupCache::SourceLookupCache(const SourceFile &SF)
: SourceLookupCache(SF.getASTContext())
{
FrontendStatsTracer tracer(SF.getASTContext().Stats,
"source-file-populate-cache");
addToUnqualifiedLookupCache(SF.getTopLevelItems(), false, false);
addToUnqualifiedLookupCache(SF.getHoistedDecls(), false, false);
}
SourceLookupCache::SourceLookupCache(const ModuleDecl &M)
: SourceLookupCache(M.getASTContext())
{
FrontendStatsTracer tracer(M.getASTContext().Stats,
"module-populate-cache");
for (const FileUnit *file : M.getFiles()) {
auto *SF = cast<SourceFile>(file);
addToUnqualifiedLookupCache(SF->getTopLevelItems(), false, false);
addToUnqualifiedLookupCache(SF->getHoistedDecls(), false, false);
if (auto *SFU = file->getSynthesizedFile()) {
addToUnqualifiedLookupCache(SFU->getTopLevelDecls(), false, false);
}
}
}
void SourceLookupCache::lookupValue(DeclName Name, NLKind LookupKind,
OptionSet<ModuleLookupFlags> Flags,
SmallVectorImpl<ValueDecl*> &Result) {
auto I = TopLevelValues.find(Name);
if (I != TopLevelValues.end()) {
Result.reserve(I->second.size());
for (ValueDecl *Elt : I->second)
if (ABIRoleInfo(Elt).matchesOptions(Flags))
Result.push_back(Elt);
}
// If we aren't supposed to find names introduced by macros, we're done.
if (Flags.contains(ModuleLookupFlags::ExcludeMacroExpansions))
return;
// Add top-level auxiliary decls to the result.
//
// FIXME: We need to not consider auxiliary decls if we're doing lookup
// from inside a macro argument at module scope.
populateAuxiliaryDeclCache();
DeclName keyName = MacroDecl::isUniqueMacroName(Name.getBaseName())
? UniqueMacroNamePlaceholder
: Name;
auto auxDecls = TopLevelAuxiliaryDecls.find(keyName);
// Check macro expansions that could produce this name.
SmallVector<MissingDecl *, 4> unexpandedDecls;
if (auxDecls != TopLevelAuxiliaryDecls.end()) {
unexpandedDecls.insert(
unexpandedDecls.end(), auxDecls->second.begin(), auxDecls->second.end());
}
// Check macro expansions that can produce arbitrary names.
unexpandedDecls.insert(
unexpandedDecls.end(),
TopLevelArbitraryMacros.begin(), TopLevelArbitraryMacros.end());
if (unexpandedDecls.empty())
return;
// Add matching expanded peers and freestanding declarations to the results.
SmallPtrSet<ValueDecl *, 4> macroExpandedDecls;
for (auto *unexpandedDecl : unexpandedDecls) {
unexpandedDecl->forEachMacroExpandedDecl(
[&](ValueDecl *decl) {
if (decl->getName().matchesRef(Name)) {
if (macroExpandedDecls.insert(decl).second)
Result.push_back(decl);
}
});
}
}
void SourceLookupCache::getPrecedenceGroups(
SmallVectorImpl<PrecedenceGroupDecl *> &results) {
for (auto &groups : PrecedenceGroups)
results.append(groups.second.begin(), groups.second.end());
}
void SourceLookupCache::getOperatorDecls(
SmallVectorImpl<OperatorDecl *> &results) {
for (auto &ops : Operators)
results.append(ops.second.begin(), ops.second.end());
}
llvm::SmallVector<AbstractFunctionDecl *, 0>
SourceLookupCache::getCustomDerivativeDecls() {
return CustomDerivatives;
}
void SourceLookupCache::lookupOperator(Identifier name, OperatorFixity fixity,
TinyPtrVector<OperatorDecl *> &results) {
auto ops = Operators.find(name);
if (ops == Operators.end())
return;
for (auto *op : ops->second)
if (op->getFixity() == fixity)
results.push_back(op);
}
void SourceLookupCache::lookupPrecedenceGroup(
Identifier name, TinyPtrVector<PrecedenceGroupDecl *> &results) {
auto groups = PrecedenceGroups.find(name);
if (groups == PrecedenceGroups.end())
return;
for (auto *group : groups->second)
results.push_back(group);
}
void SourceLookupCache::lookupVisibleDecls(ImportPath::Access AccessPath,
VisibleDeclConsumer &Consumer,
NLKind LookupKind) {
assert(AccessPath.size() <= 1 && "can only refer to top-level decls");
if (!AccessPath.empty()) {
auto I = TopLevelValues.find(AccessPath.front().Item);
if (I == TopLevelValues.end()) return;
for (auto vd : I->second)
if (ABIRoleInfo(vd).matchesOptions(OptionSet<ModuleLookupFlags>())) // FIXME: figure this out
Consumer.foundDecl(vd, DeclVisibilityKind::VisibleAtTopLevel);
return;
}
for (auto &tlv : TopLevelValues) {
for (ValueDecl *vd : tlv.second) {
// Declarations are added under their full and simple names. Skip the
// entry for the simple name so that we report each declaration once.
if (tlv.first.isSimpleName() && !vd->getName().isSimpleName())
continue;
if (ABIRoleInfo(vd).matchesOptions(OptionSet<ModuleLookupFlags>())) // FIXME: figure this out
Consumer.foundDecl(vd, DeclVisibilityKind::VisibleAtTopLevel);
}
}
populateAuxiliaryDeclCache();
SmallVector<MissingDecl *, 4> unexpandedDecls;
for (auto &entry : TopLevelAuxiliaryDecls) {
for (auto &decl : entry.second) {
(void) decl;
unexpandedDecls.append(entry.second.begin(), entry.second.end());
}
}
// Store macro expanded decls in a 'SmallSetVector' because different
// MissingDecls might be created by a single macro expansion. (e.g. multiple
// 'names' in macro role attributes). Since expansions are cached, it doesn't
// cause duplicated expansions, but different 'unexpandedDecl' may report the
// same 'ValueDecl'.
llvm::SmallSetVector<ValueDecl *, 4> macroExpandedDecls;
for (MissingDecl *unexpandedDecl : unexpandedDecls) {
unexpandedDecl->forEachMacroExpandedDecl([&](ValueDecl *vd) {
macroExpandedDecls.insert(vd);
});
}
for (auto *vd : macroExpandedDecls) {
if (ABIRoleInfo(vd).matchesOptions(OptionSet<ModuleLookupFlags>())) // FIXME: figure this out
Consumer.foundDecl(vd, DeclVisibilityKind::VisibleAtTopLevel);
}
}
void SourceLookupCache::lookupClassMembers(ImportPath::Access accessPath,
VisibleDeclConsumer &consumer) {
assert(accessPath.size() <= 1 && "can only refer to top-level decls");
std::vector<std::pair<DeclName, TinyPtrVector<ValueDecl *>>> OrderedMembers;
for (auto &member : ClassMembers) {
if (!member.first.isSimpleName())
continue;
OrderedMembers.emplace_back(member.first, member.second);
}
llvm::sort(OrderedMembers,
[](auto &LHS, auto &RHS) { return LHS.first < RHS.first; });
if (!accessPath.empty()) {
for (auto &member : OrderedMembers) {
for (ValueDecl *vd : member.second) {
auto *nominal = vd->getDeclContext()->getSelfNominalTypeDecl();
if (nominal && nominal->getName() == accessPath.front().Item)
if (ABIRoleInfo(vd).matchesOptions(OptionSet<ModuleLookupFlags>())) // FIXME: figure this out
consumer.foundDecl(vd, DeclVisibilityKind::DynamicLookup,
DynamicLookupInfo::AnyObject);
}
}
return;
}
for (auto &member : OrderedMembers) {
for (ValueDecl *vd : member.second)
if (ABIRoleInfo(vd).matchesOptions(OptionSet<ModuleLookupFlags>())) // FIXME: figure this out
consumer.foundDecl(vd, DeclVisibilityKind::DynamicLookup,
DynamicLookupInfo::AnyObject);
}
}
void SourceLookupCache::lookupClassMember(ImportPath::Access accessPath,
DeclName name,
SmallVectorImpl<ValueDecl*> &results) {
assert(accessPath.size() <= 1 && "can only refer to top-level decls");
auto iter = ClassMembers.find(name);
if (iter == ClassMembers.end())
return;
if (!accessPath.empty()) {
for (ValueDecl *vd : iter->second) {
auto *nominal = vd->getDeclContext()->getSelfNominalTypeDecl();
if (nominal && nominal->getName() == accessPath.front().Item)
if (ABIRoleInfo(vd).matchesOptions(OptionSet<ModuleLookupFlags>())) // FIXME: figure this out
results.push_back(vd);
}
return;
}
results.append(iter->second.begin(), iter->second.end());
}
//===----------------------------------------------------------------------===//
// Module Implementation
//===----------------------------------------------------------------------===//
ModuleDecl::ModuleDecl(Identifier name, ASTContext &ctx,
ImplicitImportInfo importInfo,
PopulateFilesFn populateFiles,
bool isMainModule)
: DeclContext(DeclContextKind::Module, nullptr),
TypeDecl(DeclKind::Module, &ctx, name, SourceLoc(), {}),
ImportInfo(importInfo) {
ctx.addDestructorCleanup(*this);
setImplicit();
setInterfaceType(ModuleType::get(this));
setAccess(AccessLevel::Public);
Bits.ModuleDecl.StaticLibrary = 0;
Bits.ModuleDecl.TestingEnabled = 0;
Bits.ModuleDecl.FailedToLoad = 0;
Bits.ModuleDecl.RawResilienceStrategy = 0;
Bits.ModuleDecl.HasResolvedImports = 0;
Bits.ModuleDecl.PrivateImportsEnabled = 0;
Bits.ModuleDecl.ImplicitDynamicEnabled = 0;
Bits.ModuleDecl.IsSystemModule = 0;
Bits.ModuleDecl.IsNonSwiftModule = 0;
Bits.ModuleDecl.IsMainModule = isMainModule;
Bits.ModuleDecl.HasIncrementalInfo = 0;
Bits.ModuleDecl.HasHermeticSealAtLink = 0;
Bits.ModuleDecl.IsEmbeddedSwiftModule = 0;
Bits.ModuleDecl.IsConcurrencyChecked = 0;
Bits.ModuleDecl.ObjCNameLookupCachePopulated = 0;
Bits.ModuleDecl.HasCxxInteroperability = 0;
Bits.ModuleDecl.CXXStdlibKind = 0;
Bits.ModuleDecl.AllowNonResilientAccess = 0;
Bits.ModuleDecl.SerializePackageEnabled = 0;
Bits.ModuleDecl.StrictMemorySafety = 0;
Bits.ModuleDecl.DeferredCodeGen = 0;
// Populate the module's files.
SmallVector<FileUnit *, 2> files;
populateFiles(this, [&](FileUnit *file) {
// If this is a LoadedFile, make sure it loaded without error.
assert(!(isa<LoadedFile>(file) &&
cast<LoadedFile>(file)->hadLoadError()));
// Require Main and REPL files to be the first file added.
assert(files.empty() ||
!isa<SourceFile>(file) ||
cast<SourceFile>(file)->Kind == SourceFileKind::Library ||
cast<SourceFile>(file)->Kind == SourceFileKind::SIL);
files.push_back(file);
});
Files.emplace(std::move(files));
}
void ModuleDecl::setIsSystemModule(bool flag) {
Bits.ModuleDecl.IsSystemModule = flag;
}
bool ModuleDecl::isNonUserModule() const {
// For clang submodules, retrieve their top level module (submodules have no
// source path, so we'd always return false for them).
ModuleDecl *mod = const_cast<ModuleDecl *>(this)->getTopLevelModule();
auto &evaluator = getASTContext().evaluator;
return evaluateOrDefault(evaluator, IsNonUserModuleRequest{mod}, false);
}
ImplicitImportList ModuleDecl::getImplicitImports() const {
auto &evaluator = getASTContext().evaluator;
auto *mutableThis = const_cast<ModuleDecl *>(this);
return evaluateOrDefault(evaluator, ModuleImplicitImportsRequest{mutableThis},
{});
}
const AccessNotesFile *ModuleDecl::getAccessNotes() const {
// Only the main module has access notes.
if (!isMainModule())
return nullptr;
auto &ctx = getASTContext();
return evaluateOrDefault(ctx.evaluator, LoadAccessNotesRequest{&ctx},
nullptr);
}
SourceFile *ModuleDecl::getSourceFileContainingLocation(SourceLoc loc) {
if (loc.isInvalid())
return nullptr;
auto &sourceMgr = getASTContext().SourceMgr;
// Check whether this location is in a "replaced" range, in which case
// we want to use the original source file.
SourceLoc adjustedLoc = loc;
for (const auto &pair : sourceMgr.getReplacedRanges()) {
if (sourceMgr.rangeContainsTokenLoc(pair.second, loc)) {
adjustedLoc = pair.first.Start;
break;
}
}
auto bufferID = sourceMgr.findBufferContainingLoc(adjustedLoc);
auto sourceFiles = sourceMgr.getSourceFilesForBufferID(bufferID);
for (auto sourceFile: sourceFiles) {
if (sourceFile->getParentModule() == this)
return sourceFile;
}
return nullptr;
}
ArrayRef<SourceFile *>
PrimarySourceFilesRequest::evaluate(Evaluator &evaluator,
ModuleDecl *mod) const {
assert(mod->isMainModule() && "Only the main module can have primaries");
SmallVector<SourceFile *, 8> primaries;
for (auto *file : mod->getFiles()) {
if (auto *SF = dyn_cast<SourceFile>(file)) {
if (SF->isPrimary())
primaries.push_back(SF);
}
}
return mod->getASTContext().AllocateCopy(primaries);
}
ArrayRef<SourceFile *> ModuleDecl::getPrimarySourceFiles() const {
auto &eval = getASTContext().evaluator;
auto *mutableThis = const_cast<ModuleDecl *>(this);
return evaluateOrDefault(eval, PrimarySourceFilesRequest{mutableThis}, {});
}
#define FORWARD(name, args) \
for (const FileUnit *file : getFiles()) { \
file->name args; \
if (auto *synth = file->getSynthesizedFile()) { \
synth->name args; \
} \
}
SourceLookupCache &ModuleDecl::getSourceLookupCache() const {
if (!Cache) {
const_cast<ModuleDecl *>(this)->Cache =
std::make_unique<SourceLookupCache>(*this);
}
return *Cache;
}
ModuleDecl *ModuleDecl::getTopLevelModule(bool overlay) {
// If this is a Clang module, ask the Clang importer for the top-level module.
// We need to check isNonSwiftModule() to ensure we don't look through
// overlays.
if (isNonSwiftModule()) {
if (auto *underlying = findUnderlyingClangModule()) {
auto &ctx = getASTContext();
auto *clangLoader = ctx.getClangModuleLoader();
return clangLoader->getWrapperForModule(underlying->getTopLevelModule(),
overlay);
}
}
// Swift modules don't currently support submodules.
return this;
}
bool ModuleDecl::isSubmoduleOf(const ModuleDecl *M) const {
// Swift modules don't currently support submodules.
if (!isNonSwiftModule())
return false;
auto *ClangParent = M->findUnderlyingClangModule();
if (!ClangParent)
return false;
auto *ClangModule = findUnderlyingClangModule();
if (!ClangModule)
return false;
return ClangModule->isSubModuleOf(ClangParent);
}
static bool isParsedModule(const ModuleDecl *mod) {
// FIXME: If we ever get mixed modules that contain both SourceFiles and other
// kinds of file units, this will break; there all callers of this function should
// themselves assert that all file units in the module are SourceFiles when this
// function returns true.
auto files = mod->getFiles();
return (files.size() > 0 &&
isa<SourceFile>(files[0]) &&
cast<SourceFile>(files[0])->Kind != SourceFileKind::SIL);
}
void ModuleDecl::lookupValue(DeclName Name, NLKind LookupKind,
OptionSet<ModuleLookupFlags> Flags,
SmallVectorImpl<ValueDecl*> &Result) const {
auto *stats = getASTContext().Stats;
if (stats)
++stats->getFrontendCounters().NumModuleLookupValue;
if (isParsedModule(this)) {
getSourceLookupCache().lookupValue(Name, LookupKind, Flags, Result);
return;
}
FORWARD(lookupValue, (Name, LookupKind, Flags, Result));
}
TypeDecl * ModuleDecl::lookupLocalType(StringRef MangledName) const {
for (auto file : getFiles()) {
auto TD = file->lookupLocalType(MangledName);
if (TD)
return TD;
}
return nullptr;
}
OpaqueTypeDecl *
ModuleDecl::lookupOpaqueResultType(StringRef MangledName) {
for (auto file : getFiles()) {
auto OTD = file->lookupOpaqueResultType(MangledName);
if (OTD)
return OTD;
}
return nullptr;
}
void ModuleDecl::lookupMember(SmallVectorImpl<ValueDecl*> &results,
DeclContext *container, DeclName name,
Identifier privateDiscriminator) const {
size_t oldSize = results.size();
bool alreadyInPrivateContext = false;
auto containerDecl = container->getAsDecl();
// If FileUnit, then use FileUnit::lookupValue instead.
assert(containerDecl != nullptr && "This context does not support lookup.");
if (auto nominal = dyn_cast<NominalTypeDecl>(containerDecl)) {
auto lookupResults = nominal->lookupDirect(name);
// Filter out declarations from other modules.
llvm::copy_if(lookupResults,
std::back_inserter(results),
[this](const ValueDecl *VD) -> bool {
return VD->getModuleContext() == this;
});
auto AS = nominal->getFormalAccessScope();
if (AS.isPrivate() || AS.isFileScope())
alreadyInPrivateContext = true;
} else if (isa<ModuleDecl>(containerDecl)) {
assert(container == this);
this->lookupValue(name, NLKind::QualifiedLookup, results);
} else if (!isa<GenericTypeDecl>(containerDecl)) {
// If ExtensionDecl, then use ExtensionDecl::lookupDirect instead.
llvm_unreachable("This context does not support lookup.");
}
// Filter by private-discriminator, or filter out private decls if there isn't
// one...unless we're already in a private context, in which case everything
// is private and a discriminator is unnecessary.
if (alreadyInPrivateContext) {
assert(privateDiscriminator.empty() && "unnecessary private discriminator");
// Don't remove anything; everything here is private anyway.
} else if (privateDiscriminator.empty()) {
auto newEnd = std::remove_if(results.begin()+oldSize, results.end(),
[](const ValueDecl *VD) -> bool {
// FIXME: The ClangImporter sometimes generates private declarations but
// doesn't give their file unit a private discriminator so they mangle
// incorrectly.
//
// The hasClangNode() carveout makes the ASTDemangler work properly in
// this case.
//
// We should fix things up so that such declarations also mangle with a
// a private discriminator, in which case this entry point will be called
// with the right parameters so that this isn't needed.
return (VD->getFormalAccess() <= AccessLevel::FilePrivate &&
!VD->hasClangNode());
});
results.erase(newEnd, results.end());
} else {
auto newEnd = std::remove_if(results.begin()+oldSize, results.end(),
[=](const ValueDecl *VD) -> bool {
if (VD->getFormalAccess() > AccessLevel::FilePrivate)
return true;
auto enclosingFile =
cast<FileUnit>(VD->getDeclContext()->getModuleScopeContext());
auto discriminator = enclosingFile->getDiscriminatorForPrivateDecl(VD);
return discriminator != privateDiscriminator;
});
results.erase(newEnd, results.end());
}
}
void ModuleDecl::lookupObjCMethods(
ObjCSelector selector,
SmallVectorImpl<AbstractFunctionDecl *> &results) const {
FORWARD(lookupObjCMethods, (selector, results));
}
void ModuleDecl::lookupImportedSPIGroups(
const ModuleDecl *importedModule,
llvm::SmallSetVector<Identifier, 4> &spiGroups) const {
FORWARD(lookupImportedSPIGroups, (importedModule, spiGroups));
}
bool ModuleDecl::isModuleImportedPreconcurrency(
const ModuleDecl *importedModule) const {
for (const FileUnit *file : getFiles()) {
if (file->isModuleImportedPreconcurrency(importedModule))
return true;
if (auto *synth = file->getSynthesizedFile()) {
if (synth->isModuleImportedPreconcurrency(importedModule))
return true;
}
}
return false;
}
void ModuleDecl::lookupAvailabilityDomains(
Identifier identifier,
llvm::SmallVectorImpl<AvailabilityDomain> &results) const {
auto iter = AvailabilityDomains.find(identifier);
if (iter != AvailabilityDomains.end()) {
results.push_back(AvailabilityDomain::forCustom(iter->getSecond()));
return;
}
FORWARD(lookupAvailabilityDomains, (identifier, results));
}
void BuiltinUnit::lookupValue(DeclName name, NLKind lookupKind,
OptionSet<ModuleLookupFlags> Flags,
SmallVectorImpl<ValueDecl*> &result) const {
// Only qualified lookup ever finds anything in the builtin module.
if (lookupKind != NLKind::QualifiedLookup
&& !Flags.contains(ModuleLookupFlags::HasModuleSelector))
return;
getCache().lookupValue(name.getBaseIdentifier(), lookupKind, *this, result);
}
void BuiltinUnit::lookupObjCMethods(
ObjCSelector selector,
SmallVectorImpl<AbstractFunctionDecl *> &results) const {
// No @objc methods in the Builtin module.
}
void SourceFile::lookupValue(DeclName name, NLKind lookupKind,
OptionSet<ModuleLookupFlags> flags,
SmallVectorImpl<ValueDecl*> &result) const {
getCache().lookupValue(name, lookupKind, flags, result);
}
void ModuleDecl::lookupVisibleDecls(ImportPath::Access AccessPath,
VisibleDeclConsumer &Consumer,
NLKind LookupKind) const {
if (isParsedModule(this)) {
auto &cache = getSourceLookupCache();
cache.lookupVisibleDecls(AccessPath, Consumer, LookupKind);
assert(Cache.get() == &cache && "cache invalidated during lookup");
return;
}
FORWARD(lookupVisibleDecls, (AccessPath, Consumer, LookupKind));
}
void SourceFile::lookupVisibleDecls(ImportPath::Access AccessPath,
VisibleDeclConsumer &Consumer,
NLKind LookupKind) const {
getCache().lookupVisibleDecls(AccessPath, Consumer, LookupKind);
}
void ModuleDecl::lookupClassMembers(ImportPath::Access accessPath,
VisibleDeclConsumer &consumer) const {
if (isParsedModule(this)) {
auto &cache = getSourceLookupCache();
cache.populateMemberCache(*this);
cache.lookupClassMembers(accessPath, consumer);
return;
}
FORWARD(lookupClassMembers, (accessPath, consumer));
}
void SourceFile::lookupClassMembers(ImportPath::Access accessPath,
VisibleDeclConsumer &consumer) const {
auto &cache = getCache();
cache.populateMemberCache(*this);
cache.lookupClassMembers(accessPath, consumer);
}
const GeneratedSourceInfo *SourceFile::getGeneratedSourceFileInfo() const {
return getASTContext().SourceMgr.getGeneratedSourceInfo(getBufferID());
}
ASTNode SourceFile::getMacroExpansion() const {
if (Kind != SourceFileKind::MacroExpansion)
return nullptr;
return getNodeInEnclosingSourceFile();
}
SourceRange SourceFile::getMacroInsertionRange() const {
if (Kind != SourceFileKind::MacroExpansion)
return SourceRange();
auto origRange = getGeneratedSourceFileInfo()->originalSourceRange;
return {origRange.getStart(), origRange.getEnd()};
}
CustomAttr *SourceFile::getAttachedMacroAttribute() const {
if (Kind != SourceFileKind::MacroExpansion)
return nullptr;
return getGeneratedSourceFileInfo()->attachedMacroCustomAttr;
}
std::optional<MacroRole> SourceFile::getFulfilledMacroRole() const {
if (Kind != SourceFileKind::MacroExpansion)
return std::nullopt;
switch (getGeneratedSourceFileInfo()->kind) {
#define MACRO_ROLE(Name, Description) \
case GeneratedSourceInfo::Name##MacroExpansion: \
return MacroRole::Name;
#include "swift/Basic/MacroRoles.def"
case GeneratedSourceInfo::ReplacedFunctionBody:
case GeneratedSourceInfo::PrettyPrinted:
case GeneratedSourceInfo::DefaultArgument:
case GeneratedSourceInfo::AttributeFromClang:
return std::nullopt;
}
}
SourceFile *SourceFile::getEnclosingSourceFile() const {
if (Kind != SourceFileKind::MacroExpansion &&
Kind != SourceFileKind::DefaultArgument)
return nullptr;
auto sourceLoc = getGeneratedSourceFileInfo()->originalSourceRange.getStart();
return getParentModule()->getSourceFileContainingLocation(sourceLoc);
}
ASTNode SourceFile::getNodeInEnclosingSourceFile() const {
if (Kind != SourceFileKind::MacroExpansion &&
Kind != SourceFileKind::DefaultArgument)
return nullptr;
return ASTNode::getFromOpaqueValue(getGeneratedSourceFileInfo()->astNode);
}
SourceFileExtras &SourceFile::getExtras() const {
if (!extras) {
const_cast<SourceFile *>(this)->extras = new SourceFileExtras();
getASTContext().addCleanup([extras=this->extras] {
delete extras;
});
}
return *extras;
}
void ModuleDecl::lookupClassMember(ImportPath::Access accessPath,
DeclName name,
SmallVectorImpl<ValueDecl*> &results) const {
auto *stats = getASTContext().Stats;
if (stats)
++stats->getFrontendCounters().NumModuleLookupClassMember;
if (isParsedModule(this)) {
FrontendStatsTracer tracer(getASTContext().Stats,
"source-file-lookup-class-member");
auto &cache = getSourceLookupCache();
cache.populateMemberCache(*this);
cache.lookupClassMember(accessPath, name, results);
return;
}
FORWARD(lookupClassMember, (accessPath, name, results));
}
void SourceFile::lookupClassMember(ImportPath::Access accessPath,
DeclName name,
SmallVectorImpl<ValueDecl*> &results) const {
FrontendStatsTracer tracer(getASTContext().Stats,
"source-file-lookup-class-member");
auto &cache = getCache();
cache.populateMemberCache(*this);
cache.lookupClassMember(accessPath, name, results);
}
void SourceFile::lookupObjCMethods(
ObjCSelector selector,
SmallVectorImpl<AbstractFunctionDecl *> &results) const {
// FIXME: Make sure this table is complete, somehow.
auto known = ObjCMethods.find(selector);
if (known == ObjCMethods.end()) return;
results.append(known->second.begin(), known->second.end());
}
void ModuleDecl::getLocalTypeDecls(SmallVectorImpl<TypeDecl*> &Results) const {
FORWARD(getLocalTypeDecls, (Results));
}
void ModuleDecl::getTopLevelDecls(SmallVectorImpl<Decl*> &Results) const {
FORWARD(getTopLevelDecls, (Results));
}
void ModuleDecl::getTopLevelDeclsWithAuxiliaryDecls(
SmallVectorImpl<Decl *> &Results) const {
FORWARD(getTopLevelDeclsWithAuxiliaryDecls, (Results));
}
void ModuleDecl::dumpDisplayDecls() const {
SmallVector<Decl *, 32> Decls;
getDisplayDecls(Decls);
for (auto *D : Decls) {
D->dump(llvm::errs());
llvm::errs() << "\n";
}
}
void ModuleDecl::dumpTopLevelDecls() const {
SmallVector<Decl *, 32> Decls;
getTopLevelDecls(Decls);
for (auto *D : Decls) {
D->dump(llvm::errs());
llvm::errs() << "\n";
}
}
void ModuleDecl::getExportedPrespecializations(
SmallVectorImpl<Decl *> &Results) const {
FORWARD(getExportedPrespecializations, (Results));
}
void ModuleDecl::getTopLevelDeclsWhereAttributesMatch(
SmallVectorImpl<Decl*> &Results,
llvm::function_ref<bool(DeclAttributes)> matchAttributes) const {
FORWARD(getTopLevelDeclsWhereAttributesMatch, (Results, matchAttributes));
}
void ModuleDecl::lookupTopLevelDeclsByObjCName(SmallVectorImpl<Decl *> &Results,
DeclName name) {
if (!isObjCNameLookupCachePopulated())
populateObjCNameLookupCache();
// A top level decl can't be special anyways
if (name.isSpecial())
return;
auto resultsForFileUnit = ObjCNameLookupCache.find(name.getBaseIdentifier());
if (resultsForFileUnit == ObjCNameLookupCache.end())
return;
Results.append(resultsForFileUnit->second.begin(),
resultsForFileUnit->second.end());
}
void ModuleDecl::populateObjCNameLookupCache() {
SmallVector<Decl *> topLevelObjCExposedDeclsInFileUnit;
auto hasObjCAttrNamePredicate = [](const DeclAttributes &attrs) -> bool {
return attrs.hasAttribute<ObjCAttr>();
};
for (FileUnit *file : getFiles()) {
file->getTopLevelDeclsWhereAttributesMatch(
topLevelObjCExposedDeclsInFileUnit, hasObjCAttrNamePredicate);
if (auto *synth = file->getSynthesizedFile()) {
synth->getTopLevelDeclsWhereAttributesMatch(
topLevelObjCExposedDeclsInFileUnit, hasObjCAttrNamePredicate);
}
}
for (Decl *decl : topLevelObjCExposedDeclsInFileUnit) {
if (ValueDecl *VD = dyn_cast<ValueDecl>(decl); VD && VD->hasName()) {
const auto &declObjCAttribute = VD->getAttrs().getAttribute<ObjCAttr>();
// No top level decl (class, protocol, extension etc.) is allowed to have a
// compound name, @objc provided or otherwise. Global functions are allowed to
// have compound names, but not allowed to have @objc attributes. Thus we
// are sure to not hit asserts getting the simple name.
//
// Similarly, init, dealloc and subscript (the special names) can't be top
// level decls, so we won't hit asserts getting the base identifier out of the
// value decl.
const Identifier &declObjCName =
declObjCAttribute->hasName()
? declObjCAttribute->getName()->getSimpleName()
: VD->getName().getBaseIdentifier();
ObjCNameLookupCache[declObjCName].push_back(decl);
}
}
setIsObjCNameLookupCachePopulated(true);
}
void SourceFile::getTopLevelDecls(SmallVectorImpl<Decl*> &Results) const {
auto decls = getTopLevelDecls();
Results.append(decls.begin(), decls.end());
}
void ModuleDecl::getOperatorDecls(
SmallVectorImpl<OperatorDecl *> &results) const {
// For a parsed module, we can check the source cache on the module rather
// than doing an O(N) search over the source files.
if (isParsedModule(this)) {
getSourceLookupCache().getOperatorDecls(results);
return;
}
FORWARD(getOperatorDecls, (results));
}
void SourceFile::getOperatorDecls(
SmallVectorImpl<OperatorDecl*> &results) const {
getCache().getOperatorDecls(results);
}
void ModuleDecl::getPrecedenceGroups(
SmallVectorImpl<PrecedenceGroupDecl*> &results) const {
// For a parsed module, we can check the source cache on the module rather
// than doing an O(N) search over the source files.
if (isParsedModule(this)) {
getSourceLookupCache().getPrecedenceGroups(results);
return;
}
FORWARD(getPrecedenceGroups, (results));
}
void SourceFile::getPrecedenceGroups(
SmallVectorImpl<PrecedenceGroupDecl*> &results) const {
getCache().getPrecedenceGroups(results);
}
void SourceFile::getLocalTypeDecls(SmallVectorImpl<TypeDecl*> &Results) const {
auto decls = getLocalTypeDecls();
Results.append(decls.begin(), decls.end());
}
void
SourceFile::getOpaqueReturnTypeDecls(SmallVectorImpl<OpaqueTypeDecl*> &Results)
const {
auto result = const_cast<SourceFile *>(this)->getOpaqueReturnTypeDecls();
llvm::copy(result, std::back_inserter(Results));
}
TypeDecl *SourceFile::lookupLocalType(llvm::StringRef mangledName) const {
ASTContext &ctx = getASTContext();
for (auto typeDecl : getLocalTypeDecls()) {
auto typeMangledName = evaluateOrDefault(ctx.evaluator,
MangleLocalTypeDeclRequest { typeDecl },
std::string());
if (mangledName == typeMangledName)
return typeDecl;
}
return nullptr;
}
std::optional<ExternalSourceLocs::RawLocs>
SourceFile::getExternalRawLocsForDecl(const Decl *D) const {
auto *FileCtx = D->getDeclContext()->getModuleScopeContext();
assert(FileCtx == this && "D doesn't belong to this source file");
if (FileCtx != this) {
// D doesn't belong to this file. This shouldn't happen in practice.
return std::nullopt;
}
SourceLoc MainLoc = D->getLoc(/*SerializedOK=*/false);
if (MainLoc.isInvalid())
return std::nullopt;
// TODO: Rather than grabbing the location of the macro expansion, we should
// instead add the generated buffer tree - that would need to include source
// if we want to be able to retrieve documentation within generated buffers.
SourceManager &SM = getASTContext().SourceMgr;
bool InGeneratedBuffer =
!SM.rangeContainsTokenLoc(SM.getRangeForBuffer(BufferID), MainLoc);
if (InGeneratedBuffer) {
if (auto R = getUnexpandedMacroRange(SM, MainLoc)) {
if (BufferID != SM.findBufferContainingLoc(R.Start))
return std::nullopt;
MainLoc = R.Start;
}
}
auto setLoc = [&](ExternalSourceLocs::RawLoc &RawLoc, SourceLoc Loc) {
if (!Loc.isValid())
return;
RawLoc.Offset = SM.getLocOffsetInBuffer(Loc, BufferID);
std::tie(RawLoc.Line, RawLoc.Column) = SM.getLineAndColumnInBuffer(Loc);
auto *VF = SM.getVirtualFile(Loc);
if (!VF)
return;
RawLoc.Directive.Offset =
SM.getLocOffsetInBuffer(VF->Range.getStart(), BufferID);
RawLoc.Directive.LineOffset = VF->LineOffset;
RawLoc.Directive.Length = VF->Range.getByteLength();
RawLoc.Directive.Name = StringRef(VF->Name);
};
ExternalSourceLocs::RawLocs Result;
Result.SourceFilePath = SM.getIdentifierForBuffer(BufferID);
setLoc(Result.Loc, MainLoc);
if (!InGeneratedBuffer) {
for (const auto &SRC : D->getRawComment().Comments) {
Result.DocRanges.emplace_back(ExternalSourceLocs::RawLoc(),
SRC.Range.getByteLength());
setLoc(Result.DocRanges.back().first, SRC.Range.getStart());
}
setLoc(Result.StartLoc, D->getStartLoc());
setLoc(Result.EndLoc, D->getEndLoc());
}
return Result;
}
void ModuleDecl::ImportCollector::collect(
const ImportedModule &importedModule) {
auto *module = importedModule.importedModule;
if (importFilter && !importFilter(module))
return;
if (importedModule.getAccessPath().size() > 0) {
auto collectDecls = [&](ValueDecl *VD, DeclVisibilityKind reason) {
if (reason == DeclVisibilityKind::VisibleAtTopLevel)
this->qualifiedImports[module].insert(VD);
};
auto consumer = makeDeclConsumer(std::move(collectDecls));
module->lookupVisibleDecls(importedModule.getAccessPath(), consumer,
NLKind::UnqualifiedLookup);
} else {
imports.insert(module);
}
}
static void
collectExportedImports(const ModuleDecl *topLevelModule,
ModuleDecl::ImportCollector &importCollector) {
SmallVector<const ModuleDecl *> stack;
SmallPtrSet<const ModuleDecl *, 4> visited;
visited.insert(topLevelModule);
stack.push_back(topLevelModule);
while (!stack.empty()) {
const ModuleDecl *module = stack.pop_back_val();
if (module->isNonSwiftModule() && module != topLevelModule &&
!module->isSubmoduleOf(topLevelModule)) {
// Recurse into submodules of the top-level module so that we can
// re-export them if necessary.
continue;
}
for (const FileUnit *file : module->getFiles()) {
if (const SourceFile *source = dyn_cast<SourceFile>(file)) {
if (source->hasImports()) {
for (const auto &import : source->getImports()) {
if (import.options.contains(ImportFlags::Exported) &&
import.docVisibility.value_or(AccessLevel::Public) >=
importCollector.minimumDocVisibility) {
importCollector.collect(import.module);
stack.push_back(import.module.importedModule);
}
}
}
} else {
SmallVector<ImportedModule, 8> exportedImports;
file->getImportedModules(exportedImports,
ModuleDecl::ImportFilterKind::Exported);
for (const auto &im : exportedImports) {
// Skip collecting the underlying clang module as we already have the relevant import.
if (!module->isClangOverlayOf(im.importedModule))
importCollector.collect(im);
if (!visited.contains(im.importedModule)) {
visited.insert(im.importedModule);
stack.push_back(im.importedModule);
}
}
}
}
}
}
void ModuleDecl::getDisplayDecls(SmallVectorImpl<Decl*> &Results, bool Recursive) const {
if (Recursive) {
ImportCollector importCollector;
this->getDisplayDeclsRecursivelyAndImports(Results, importCollector);
} else {
// FIXME: Should this do extra access control filtering?
FORWARD(getDisplayDecls, (Results));
}
}
void ModuleDecl::getDisplayDeclsRecursivelyAndImports(
SmallVectorImpl<Decl *> &results, ImportCollector &importCollector) const {
this->getDisplayDecls(results, /*Recursive=*/false);
// Look up imports recursively.
collectExportedImports(this, importCollector);
for (const auto &QI : importCollector.qualifiedImports) {
auto Module = QI.getFirst();
if (importCollector.imports.contains(Module))
continue;
auto &Decls = QI.getSecond();
results.append(Decls.begin(), Decls.end());
}
for (const ModuleDecl *import : importCollector.imports)
import->getDisplayDecls(results);
#ifndef NDEBUG
llvm::DenseSet<Decl *> visited;
for (auto *D : results) {
// decls synthesized from implicit clang decls may appear multiple times;
// e.g. if multiple modules with underlying clang modules are re-exported.
// including duplicates of these is harmless, so skip them when counting
// this assertion
if (const auto *CD = D->getClangDecl()) {
if (CD->isImplicit())
continue;
}
auto inserted = visited.insert(D).second;
assert(inserted && "there should be no duplicate decls");
}
#endif
}
Fingerprint SourceFile::getInterfaceHash() const {
assert(hasInterfaceHash() && "Interface hash not enabled");
auto &eval = getASTContext().evaluator;
auto *mutableThis = const_cast<SourceFile *>(this);
return evaluateOrDefault(eval, ParseSourceFileRequest{mutableThis}, {})
.Fingerprint.value();
}
Fingerprint SourceFile::getInterfaceHashIncludingTypeMembers() const {
/// FIXME: Gross. Hashing multiple "hash" values.
auto hash = StableHasher::defaultHasher();
hash.combine(getInterfaceHash());
std::function<void(IterableDeclContext *)> hashTypeBodyFingerprints =
[&](IterableDeclContext *IDC) {
if (auto fp = IDC->getBodyFingerprint())
hash.combine(*fp);
for (auto *member : IDC->getParsedMembers())
if (auto *childIDC = dyn_cast<IterableDeclContext>(member))
hashTypeBodyFingerprints(childIDC);
};
for (auto *D : getTopLevelDecls()) {
if (auto IDC = dyn_cast<IterableDeclContext>(D))
hashTypeBodyFingerprints(IDC);
}
return Fingerprint{std::move(hash)};
}
void DirectOperatorLookupRequest::writeDependencySink(
evaluator::DependencyCollector &reqTracker,
const TinyPtrVector<OperatorDecl *> &ops) const {
auto &desc = std::get<0>(getStorage());
reqTracker.addTopLevelName(desc.name);
}
TinyPtrVector<OperatorDecl *>
DirectOperatorLookupRequest::evaluate(Evaluator &evaluator,
OperatorLookupDescriptor descriptor,
OperatorFixity fixity) const {
// For a parsed module, we can check the source cache on the module rather
// than doing an O(N) search over the source files.
TinyPtrVector<OperatorDecl *> results;
if (auto module = descriptor.getModule()) {
if (isParsedModule(module)) {
module->getSourceLookupCache().lookupOperator(descriptor.name, fixity,
results);
return results;
}
}
// Otherwise query each file.
for (auto *file : descriptor.getFiles())
file->lookupOperatorDirect(descriptor.name, fixity, results);
return results;
}
void SourceFile::lookupOperatorDirect(
Identifier name, OperatorFixity fixity,
TinyPtrVector<OperatorDecl *> &results) const {
getCache().lookupOperator(name, fixity, results);
}
void DirectPrecedenceGroupLookupRequest::writeDependencySink(
evaluator::DependencyCollector &reqTracker,
const TinyPtrVector<PrecedenceGroupDecl *> &groups) const {
auto &desc = std::get<0>(getStorage());
reqTracker.addTopLevelName(desc.name);
}
TinyPtrVector<PrecedenceGroupDecl *>
DirectPrecedenceGroupLookupRequest::evaluate(
Evaluator &evaluator, OperatorLookupDescriptor descriptor) const {
// For a parsed module, we can check the source cache on the module rather
// than doing an O(N) search over the source files.
TinyPtrVector<PrecedenceGroupDecl *> results;
if (auto module = descriptor.getModule()) {
if (isParsedModule(module)) {
module->getSourceLookupCache().lookupPrecedenceGroup(descriptor.name,
results);
return results;
}
}
// Otherwise query each file.
for (auto *file : descriptor.getFiles())
file->lookupPrecedenceGroupDirect(descriptor.name, results);
return results;
}
void SourceFile::lookupPrecedenceGroupDirect(
Identifier name, TinyPtrVector<PrecedenceGroupDecl *> &results) const {
getCache().lookupPrecedenceGroup(name, results);
}
void ModuleDecl::getImportedModules(SmallVectorImpl<ImportedModule> &modules,
ModuleDecl::ImportFilter filter) const {
FORWARD(getImportedModules, (modules, filter));
}
void ModuleDecl::getExternalMacros(
SmallVectorImpl<ExternalMacroPlugin> &macros) const {
FORWARD(getExternalMacros, (macros));
}
void ModuleDecl::getImplicitImportsForModuleInterface(
SmallVectorImpl<ImportedModule> &imports) const {
FORWARD(getImplicitImportsForModuleInterface, (imports));
}
const llvm::DenseMap<const clang::Module *, ModuleDecl *> &
ModuleDecl::getVisibleClangModules(PrintOptions::InterfaceMode contentMode) {
if (CachedVisibleClangModuleSet.find(contentMode) != CachedVisibleClangModuleSet.end())
return CachedVisibleClangModuleSet[contentMode];
else
CachedVisibleClangModuleSet.emplace(contentMode, VisibleClangModuleSet{});
VisibleClangModuleSet &result = CachedVisibleClangModuleSet[contentMode];
// For the current module, consider both private and public imports.
ModuleDecl::ImportFilter Filter = ModuleDecl::ImportFilterKind::Exported;
Filter |= ModuleDecl::ImportFilterKind::Default;
// For private or package swiftinterfaces, also look through @_spiOnly imports.
if (contentMode != PrintOptions::InterfaceMode::Public)
Filter |= ModuleDecl::ImportFilterKind::SPIOnly;
// Consider package import for package interface
if (contentMode == PrintOptions::InterfaceMode::Package)
Filter |= ModuleDecl::ImportFilterKind::PackageOnly;
SmallVector<ImportedModule, 32> Imports;
getImportedModules(Imports, Filter);
SmallVector<ModuleDecl *, 32> ModulesToProcess;
for (const auto &Import : Imports)
ModulesToProcess.push_back(Import.importedModule);
SmallPtrSet<ModuleDecl *, 32> Processed;
while (!ModulesToProcess.empty()) {
ModuleDecl *Mod = ModulesToProcess.back();
ModulesToProcess.pop_back();
if (!Processed.insert(Mod).second)
continue;
if (const clang::Module *ClangModule = Mod->findUnderlyingClangModule())
result[ClangModule] = Mod;
// For transitive imports, consider only public imports.
Imports.clear();
Mod->getImportedModules(Imports, ModuleDecl::ImportFilterKind::Exported);
for (const auto &Import : Imports) {
ModulesToProcess.push_back(Import.importedModule);
}
}
return result;
}
void
SourceFile::getImportedModules(SmallVectorImpl<ImportedModule> &modules,
ModuleDecl::ImportFilter filter) const {
// FIXME: Ideally we should assert that the file has had its imports resolved
// before calling this function. However unfortunately that can cause issues
// for overlays which can depend on a Clang submodule for the underlying
// framework they are overlaying, which causes us to attempt to load the
// overlay again. We need to find a way to ensure that an overlay dependency
// with the same name as the overlay always loads the underlying Clang module.
// We currently handle this for a direct import from the overlay, but not when
// it happens through other imports.
assert(filter && "no imports requested?");
if (!Imports)
return;
for (auto desc : *Imports) {
ModuleDecl::ImportFilter requiredFilter;
if (desc.options.contains(ImportFlags::Exported))
requiredFilter |= ModuleDecl::ImportFilterKind::Exported;
else if (desc.options.contains(ImportFlags::ImplementationOnly))
requiredFilter |= ModuleDecl::ImportFilterKind::ImplementationOnly;
else if (desc.accessLevel <= AccessLevel::Internal)
requiredFilter |= ModuleDecl::ImportFilterKind::InternalOrBelow;
else if (desc.accessLevel <= AccessLevel::Package)
requiredFilter |= ModuleDecl::ImportFilterKind::PackageOnly;
else if (desc.options.contains(ImportFlags::SPIOnly))
requiredFilter |= ModuleDecl::ImportFilterKind::SPIOnly;
else
requiredFilter |= ModuleDecl::ImportFilterKind::Default;
if (!separatelyImportedOverlays.lookup(desc.module.importedModule).empty())
requiredFilter |= ModuleDecl::ImportFilterKind::ShadowedByCrossImportOverlay;
if (filter.contains(requiredFilter))
modules.push_back(desc.module);
}
}
void SourceFile::getExternalMacros(
SmallVectorImpl<ExternalMacroPlugin> &macros) const {
for (auto *D : getTopLevelDecls()) {
auto macroDecl = dyn_cast<MacroDecl>(D);
if (!macroDecl)
continue;
auto macroDef = macroDecl->getDefinition();
if (macroDef.kind != MacroDefinition::Kind::External)
continue;
auto formalAccess = macroDecl->getFormalAccess();
ExternalMacroPlugin::Access access = ExternalMacroPlugin::Access::Internal;
if (formalAccess >= AccessLevel::Public)
access = ExternalMacroPlugin::Access::Public;
else if (formalAccess >= AccessLevel::Package)
access = ExternalMacroPlugin::Access::Package;
auto external = macroDef.getExternalMacro();
macros.push_back({external.moduleName.str().str(), access});
}
}
void SourceFile::getImplicitImportsForModuleInterface(
SmallVectorImpl<ImportedModule> &modules) const {
for (auto module : ImplicitImportsForModuleInterface)
modules.push_back(module);
}
void SourceFile::dumpSeparatelyImportedOverlays() const {
for (auto &pair : separatelyImportedOverlays) {
auto &underlying = std::get<0>(pair);
auto &overlays = std::get<1>(pair);
llvm::errs() << (void*)underlying << " ";
underlying->dump(llvm::errs());
for (auto overlay : overlays) {
llvm::errs() << "- ";
llvm::errs() << (void*)overlay << " ";
overlay->dump(llvm::errs());
}
}
}
void ModuleDecl::getImportedModulesForLookup(
SmallVectorImpl<ImportedModule> &modules) const {
// FIXME: We can unfortunately end up in a cycle where we attempt to query
// the files for a serialized module while attempting to load its LoadedFile
// unit. This is because both SerializedModuleLoader and ClangImporter
// kick the computation of transitive module dependencies, which can end up
// pointing back to the original module in cases where it's an overlay. We
// ought to be more lazy there. This is also why
// `SourceFile::getImportedModules` cannot assume imports have been resolved.
if (!Files.has_value())
return;
FORWARD(getImportedModulesForLookup, (modules));
}
ModuleDecl::ReverseFullNameIterator::ReverseFullNameIterator(
const ModuleDecl *M) {
assert(M);
// Note: This will look through overlays as well, but that's fine for name
// generation purposes. The point of an overlay is to
if (auto *clangModule = M->findUnderlyingClangModule())
current = clangModule;
else
current = M;
}
StringRef ModuleDecl::ReverseFullNameIterator::operator*() const {
assert(current && "all name components exhausted");
// Return the module's real (binary) name, which can be different from
// the name if module aliasing was used (-module-alias flag). The real
// name is used for serialization and loading.
if (auto *swiftModule = current.dyn_cast<const ModuleDecl *>())
return swiftModule->getRealName().str();
auto *clangModule =
static_cast<const clang::Module *>(cast<const void *>(current));
if (!clangModule->isSubModule() && clangModule->Name == "std")
return "CxxStdlib";
return clangModule->Name;
}
ModuleDecl::ReverseFullNameIterator &
ModuleDecl::ReverseFullNameIterator::operator++() {
if (!current)
return *this;
if (isa<const ModuleDecl *>(current)) {
current = nullptr;
return *this;
}
auto *clangModule =
static_cast<const clang::Module *>(cast<const void *>(current));
if (clangModule->Parent)
current = clangModule->Parent;
else
current = nullptr;
return *this;
}
void
ModuleDecl::ReverseFullNameIterator::printForward(raw_ostream &out,
StringRef delim) const {
SmallVector<StringRef, 8> elements(*this, {});
llvm::interleave(
llvm::reverse(elements), [&out](StringRef next) { out << next; },
[&out, delim] { out << delim; });
}
void
ImportedModule::removeDuplicates(SmallVectorImpl<ImportedModule> &imports) {
std::sort(imports.begin(), imports.end(),
[](const ImportedModule &lhs, const ImportedModule &rhs) -> bool {
// Arbitrarily sort by name to get a deterministic order.
if (lhs.importedModule != rhs.importedModule) {
return std::lexicographical_compare(
lhs.importedModule->getReverseFullModuleName(), {},
rhs.importedModule->getReverseFullModuleName(), {});
}
return std::lexicographical_compare(
lhs.accessPath.begin(), lhs.accessPath.end(), rhs.accessPath.begin(),
rhs.accessPath.end(),
[](const ImportPath::Element &lElem, const ImportPath::Element &rElem) {
return lElem.Item.str() < rElem.Item.str();
});
});
auto last = std::unique(
imports.begin(), imports.end(),
[](const ImportedModule &lhs, const ImportedModule &rhs) -> bool {
if (lhs.importedModule != rhs.importedModule)
return false;
return lhs.accessPath.isSameAs(rhs.accessPath);
});
imports.erase(last, imports.end());
}
Identifier ModuleDecl::getPublicModuleName(bool onlyIfImported) const {
if (!PublicModuleName.empty() &&
(!onlyIfImported ||
getASTContext().getLoadedModule(PublicModuleName)))
return PublicModuleName;
return getName();
}
Identifier ModuleDecl::getRealName() const {
// This will return the real name for an alias (if used) or getName()
return getASTContext().getRealModuleName(getName());
}
bool ModuleDecl::allowImportedBy(ModuleDecl *importer) const {
if (allowableClientNames.empty())
return true;
for (auto id: allowableClientNames) {
if (importer->getRealName() == id)
return true;
if (importer->getABIName() == id)
return true;
}
return false;
}
Identifier ModuleDecl::getABIName() const {
if (!ModuleABIName.empty())
return ModuleABIName;
// Hard code that the _Concurrency module has Swift as its ABI name.
// FIXME: This works around a backward-compatibility issue where
// -module-abi-name is not supported on existing Swift compilers. Remove
// this hack later and pass -module-abi-name when building the _Concurrency
// module.
if (getName().str() == SWIFT_CONCURRENCY_NAME) {
ModuleABIName = getASTContext().getIdentifier(STDLIB_NAME);
return ModuleABIName;
}
return getName();
}
void ModuleDecl::setABIName(Identifier name) {
getASTContext().moduleABINameWillChange(this, name);
ModuleABIName = name;
}
StringRef ModuleDecl::getModuleFilename() const {
// FIXME: Audit uses of this function and figure out how to migrate them to
// per-file names. Modules can consist of more than one file.
StringRef Result;
for (auto F : getFiles()) {
if (auto SF = dyn_cast<SourceFile>(F)) {
if (!Result.empty())
return StringRef();
Result = SF->getFilename();
continue;
}
if (auto LF = dyn_cast<LoadedFile>(F)) {
if (!Result.empty())
return StringRef();
Result = LF->getFilename();
continue;
}
// Skip synthesized files.
if (isa<SynthesizedFileUnit>(F))
continue;
return StringRef();
}
return Result;
}
StringRef ModuleDecl::getModuleSourceFilename() const {
for (auto F : getFiles()) {
if (auto LF = dyn_cast<LoadedFile>(F))
return LF->getSourceFilename();
}
return StringRef();
}
StringRef ModuleDecl::getModuleLoadedFilename() const {
for (auto F : getFiles()) {
if (auto LF = dyn_cast<LoadedFile>(F)) {
return LF->getLoadedFilename();
}
}
return StringRef();
}
bool ModuleDecl::isStdlibModule() const {
return !getParent() && getName() == getASTContext().StdlibModuleName;
}
bool ModuleDecl::isCxxModule() const {
return !getParent() && getName() == getASTContext().Id_Cxx;
}
bool ModuleDecl::isConcurrencyModule() const {
return !getParent() && getName() == getASTContext().Id_Concurrency;
}
bool ModuleDecl::hasStandardSubstitutions() const {
return !getParent() &&
(getName() == getASTContext().StdlibModuleName ||
getName() == getASTContext().Id_Concurrency);
}
bool ModuleDecl::isSwiftShimsModule() const {
return !getParent() && getName() == getASTContext().SwiftShimsModuleName;
}
bool ModuleDecl::isOnoneSupportModule() const {
return !getParent() && getName().str() == SWIFT_ONONE_SUPPORT;
}
bool ModuleDecl::isFoundationModule() const {
return !getParent() && getName() == getASTContext().Id_Foundation;
}
bool ModuleDecl::isBuiltinModule() const {
return this == getASTContext().TheBuiltinModule;
}
bool SourceFile::registerMainDecl(ValueDecl *mainDecl, SourceLoc diagLoc) {
assert(mainDecl);
if (mainDecl == MainDecl)
return false;
ArtificialMainKind kind = mainDecl->getArtificialMainKind();
if (getParentModule()->registerEntryPointFile(this, diagLoc, kind))
return true;
MainDecl = mainDecl;
MainDeclDiagLoc = diagLoc;
return false;
}
NominalTypeDecl *ModuleDecl::getMainTypeDecl() const {
if (!EntryPointInfo.hasEntryPoint())
return nullptr;
auto *file = EntryPointInfo.getEntryPointFile();
if (!file)
return nullptr;
auto *mainDecl = file->getMainDecl();
if (!mainDecl)
return nullptr;
auto *func = dyn_cast<FuncDecl>(file->getMainDecl());
if (!func)
return nullptr;
auto *nominalType = dyn_cast<NominalTypeDecl>(func->getDeclContext());
return nominalType;
}
bool ModuleDecl::registerEntryPointFile(
FileUnit *file, SourceLoc diagLoc, std::optional<ArtificialMainKind> kind) {
if (!EntryPointInfo.hasEntryPoint()) {
EntryPointInfo.setEntryPointFile(file);
return false;
}
if (diagLoc.isInvalid())
return true;
assert(kind.has_value() && "multiple entry points without attributes");
// %select indices for UI/NSApplication-related diagnostics.
enum : unsigned {
UIApplicationMainClass = 0,
NSApplicationMainClass = 1,
MainType = 2,
} mainTypeDiagKind;
switch (kind.value()) {
case ArtificialMainKind::UIApplicationMain:
mainTypeDiagKind = UIApplicationMainClass;
break;
case ArtificialMainKind::NSApplicationMain:
mainTypeDiagKind = NSApplicationMainClass;
break;
case ArtificialMainKind::TypeMain:
mainTypeDiagKind = MainType;
break;
}
FileUnit *existingFile = EntryPointInfo.getEntryPointFile();
const Decl *existingDecl = existingFile->getMainDecl();
SourceLoc existingDiagLoc;
if (auto *sourceFile = dyn_cast<SourceFile>(existingFile)) {
if (existingDecl) {
existingDiagLoc = sourceFile->getMainDeclDiagLoc();
} else {
auto bufID = sourceFile->getBufferID();
existingDiagLoc = getASTContext().SourceMgr.getLocForBufferStart(bufID);
}
}
if (existingDecl) {
if (EntryPointInfo.markDiagnosedMultipleMainClasses()) {
// If we already have a main type, and we haven't diagnosed it,
// do so now.
if (existingDiagLoc.isValid()) {
getASTContext().Diags.diagnose(existingDiagLoc,
diag::attr_ApplicationMain_multiple,
mainTypeDiagKind);
} else {
getASTContext().Diags.diagnose(existingDecl,
diag::attr_ApplicationMain_multiple,
mainTypeDiagKind);
}
}
// Always diagnose the new class.
getASTContext().Diags.diagnose(diagLoc, diag::attr_ApplicationMain_multiple,
mainTypeDiagKind);
} else {
// We don't have an existing class, but we /do/ have a file in script mode.
// Diagnose that.
if (EntryPointInfo.markDiagnosedMainClassWithScript()) {
getASTContext().Diags.diagnose(
diagLoc, diag::attr_ApplicationMain_with_script, mainTypeDiagKind);
if (existingDiagLoc.isValid()) {
getASTContext().Diags.diagnose(existingDiagLoc,
diag::attr_ApplicationMain_script_here);
getASTContext().Diags.diagnose(existingDiagLoc,
diag::attr_ApplicationMain_parse_as_library);
}
}
}
return true;
}
void ModuleDecl::collectLinkLibraries(LinkLibraryCallback callback) const {
bool hasSourceFile = false;
for (auto *file : getFiles()) {
if (isa<SourceFile>(file)) {
hasSourceFile = true;
} else {
file->collectLinkLibraries(callback);
}
if (auto *synth = file->getSynthesizedFile()) {
synth->collectLinkLibraries(callback);
}
}
if (!hasSourceFile)
return;
llvm::SmallDenseSet<ModuleDecl *, 32> visited;
SmallVector<ImportedModule, 32> stack;
ModuleDecl::ImportFilter filter = {
ModuleDecl::ImportFilterKind::Exported,
ModuleDecl::ImportFilterKind::Default};
ModuleDecl::ImportFilter topLevelFilter = filter;
topLevelFilter |= ModuleDecl::ImportFilterKind::ImplementationOnly;
topLevelFilter |= ModuleDecl::ImportFilterKind::InternalOrBelow;
topLevelFilter |= ModuleDecl::ImportFilterKind::PackageOnly,
topLevelFilter |= ModuleDecl::ImportFilterKind::SPIOnly;
getImportedModules(stack, topLevelFilter);
// Make sure the top-level module is first; we want pre-order-ish traversal.
stack.emplace_back(ImportPath::Access(), const_cast<ModuleDecl *>(this));
while (!stack.empty()) {
auto next = stack.pop_back_val().importedModule;
if (!visited.insert(next).second)
continue;
if (next->getName() != getName()) {
next->collectLinkLibraries(callback);
}
next->getImportedModules(stack, filter);
}
}
void
SourceFile::collectLinkLibraries(ModuleDecl::LinkLibraryCallback callback) const {}
bool ModuleDecl::walk(ASTWalker &Walker) {
llvm::SaveAndRestore<ASTWalker::ParentTy> SAR(Walker.Parent, this);
for (auto SF : getFiles())
if (SF->walk(Walker))
return true;
return false;
}
ModuleDecl *ModuleDecl::getUnderlyingModuleIfOverlay() const {
for (auto *FU : getFiles()) {
if (auto *Mod = FU->getUnderlyingModuleIfOverlay())
return Mod;
}
return nullptr;
}
const clang::Module *ModuleDecl::findUnderlyingClangModule() const {
for (auto *FU : getFiles()) {
if (auto *Mod = FU->getUnderlyingClangModule())
return Mod;
}
return nullptr;
}
void ModuleDecl::collectBasicSourceFileInfo(
llvm::function_ref<void(const BasicSourceFileInfo &)> callback) const {
for (const FileUnit *fileUnit : getFiles()) {
if (const auto *SF = dyn_cast<SourceFile>(fileUnit)) {
callback(BasicSourceFileInfo(SF));
} else if (auto *serialized = dyn_cast<LoadedFile>(fileUnit)) {
serialized->collectBasicSourceFileInfo(callback);
}
}
}
void ModuleDecl::collectSerializedSearchPath(
llvm::function_ref<void(StringRef)> callback) const {
for (const FileUnit *fileUnit : getFiles()) {
if (auto *serialized = dyn_cast<LoadedFile>(fileUnit)) {
serialized->collectSerializedSearchPath(callback);
}
}
}
Fingerprint ModuleDecl::getFingerprint() const {
StableHasher hasher = StableHasher::defaultHasher();
SmallVector<Fingerprint, 16> FPs;
collectBasicSourceFileInfo([&](const BasicSourceFileInfo &bsfi) {
// For incremental imports, the hash must be insensitive to type-body
// changes, so use the one without type members.
FPs.emplace_back(bsfi.getInterfaceHashExcludingTypeMembers());
});
// Sort the fingerprints lexicographically so we have a stable hash despite
// an unstable ordering of files across rebuilds.
// FIXME: If we used a commutative hash combine (say, if we could take an
// XOR here) we could avoid this sort.
std::sort(FPs.begin(), FPs.end(), std::less<Fingerprint>());
for (const auto &FP : FPs) {
hasher.combine(FP);
}
return Fingerprint{std::move(hasher)};
}
bool ModuleDecl::isExternallyConsumed() const {
// Modules for executables aren't expected to be consumed by other modules.
// This picks up all kinds of entrypoints, including script mode,
// @UIApplicationMain and @NSApplicationMain.
if (hasEntryPoint()) {
return false;
}
// If an implicit Objective-C header was needed to construct this module, it
// must be the product of a library target.
if (!getImplicitImportInfo().BridgingHeaderPath.empty()) {
return false;
}
// App extensions are special beasts because they build without entrypoints
// like library targets, but they behave like executable targets because
// their associated modules are not suitable for distribution.
// However, app extension libraries might be consumed externally.
if (getASTContext().LangOpts.EnableAppExtensionRestrictions &&
!getASTContext().LangOpts.EnableAppExtensionLibraryRestrictions) {
return false;
}
// FIXME: This is still a lousy approximation of whether the module file will
// be externally consumed.
return true;
}
//===----------------------------------------------------------------------===//
// Cross-Import Overlays
//===----------------------------------------------------------------------===//
namespace swift {
/// Represents a file containing information about cross-module overlays.
class OverlayFile : public ASTAllocated<OverlayFile> {
friend class ModuleDecl;
/// The file that data should be loaded from.
StringRef filePath;
/// The list of module names; empty if loading failed.
llvm::TinyPtrVector<Identifier> overlayModuleNames;
enum class State { Pending, Loaded, Failed };
State state = State::Pending;
/// Actually loads the overlay module name list. This should mutate
/// \c overlayModuleNames, but not \c filePath.
///
/// \returns \c true on success, \c false on failure. Diagnoses any failures
/// before returning.
bool loadOverlayModuleNames(const ModuleDecl *M, SourceLoc diagLoc,
Identifier bystandingModule);
bool loadOverlayModuleNames(ASTContext &ctx,
StringRef module,
StringRef bystandingModule,
SourceLoc diagLoc);
public:
OverlayFile(StringRef filePath)
: filePath(filePath) {
assert(!filePath.empty());
}
/// Returns the list of additional modules that should be imported if both
/// the primary and secondary modules have been imported. This may load a
/// file; if so, it will diagnose any errors itself and arrange for the file
/// to not be loaded again.
///
/// The result can be empty, either because of an error or because the file
/// didn't contain any overlay module names.
ArrayRef<Identifier> getOverlayModuleNames(const ModuleDecl *M,
SourceLoc diagLoc,
Identifier bystandingModule) {
if (state == State::Pending) {
state = loadOverlayModuleNames(M, diagLoc, bystandingModule)
? State::Loaded : State::Failed;
}
return overlayModuleNames;
}
};
}
void ModuleDecl::addCrossImportOverlayFile(StringRef file) {
auto &ctx = getASTContext();
Identifier secondaryModule = ctx.getIdentifier(llvm::sys::path::stem(file));
declaredCrossImports[secondaryModule]
.push_back(new (ctx) OverlayFile(ctx.AllocateCopy(file)));
}
llvm::SmallSetVector<Identifier, 4>
ModuleDecl::collectCrossImportOverlay(ASTContext &ctx,
StringRef file,
StringRef moduleName,
StringRef &bystandingModule) {
OverlayFile ovFile(file);
bystandingModule = llvm::sys::path::stem(file);
ovFile.loadOverlayModuleNames(ctx, moduleName, bystandingModule, SourceLoc());
llvm::SmallSetVector<Identifier, 4> result;
for (auto Id: ovFile.overlayModuleNames) {
result.insert(Id);
}
return result;
}
bool ModuleDecl::mightDeclareCrossImportOverlays() const {
return !declaredCrossImports.empty();
}
void ModuleDecl::
findDeclaredCrossImportOverlays(Identifier bystanderName,
SmallVectorImpl<Identifier> &overlayNames,
SourceLoc diagLoc) const {
if (getName() == bystanderName)
// We don't currently support self-cross-imports.
return;
for (auto &crossImportFile : declaredCrossImports.lookup(bystanderName))
llvm::copy(crossImportFile->getOverlayModuleNames(this, diagLoc,
bystanderName),
std::back_inserter(overlayNames));
}
void ModuleDecl::getDeclaredCrossImportBystanders(
SmallVectorImpl<Identifier> &otherModules) {
for (auto &pair : declaredCrossImports)
otherModules.push_back(std::get<0>(pair));
}
void ModuleDecl::findDeclaredCrossImportOverlaysTransitive(
SmallVectorImpl<ModuleDecl *> &overlayModules) {
SmallVector<ModuleDecl *, 1> worklist;
SmallPtrSet<ModuleDecl *, 1> seen;
SourceLoc unused;
worklist.push_back(this);
if (auto *clangModule = getUnderlyingModuleIfOverlay())
worklist.push_back(clangModule);
auto addOverlay = [&](Identifier overlay) {
// We don't present non-underscored overlays as part of the underlying
// module, so ignore them.
if (!overlay.hasUnderscoredNaming())
return;
ModuleDecl *overlayMod =
getASTContext().getModuleByIdentifier(overlay);
if (!overlayMod && overlayMod != this)
return;
if (seen.insert(overlayMod).second) {
overlayModules.push_back(overlayMod);
worklist.push_back(overlayMod);
if (auto *clangModule = overlayMod->getUnderlyingModuleIfOverlay())
worklist.push_back(clangModule);
}
};
while (!worklist.empty()) {
ModuleDecl *current = worklist.back();
worklist.pop_back();
if (current->isStdlibModule()) {
for (auto overlay : getASTContext().StdlibOverlayNames) {
addOverlay(overlay);
}
}
for (auto &pair: current->declaredCrossImports) {
Identifier &bystander = std::get<0>(pair);
for (auto *file: std::get<1>(pair)) {
auto overlays = file->getOverlayModuleNames(current, unused, bystander);
for (Identifier overlay: overlays) {
addOverlay(overlay);
}
}
}
}
}
namespace {
using CrossImportMap =
llvm::SmallDenseMap<Identifier, SmallVector<OverlayFile *, 1>>;
Identifier getBystanderIfDeclaring(ModuleDecl *mod, ModuleDecl *overlay,
CrossImportMap modCrossImports) {
auto ret = std::find_if(modCrossImports.begin(), modCrossImports.end(),
[&](CrossImportMap::iterator::value_type &pair) {
for (OverlayFile *file: std::get<1>(pair)) {
ArrayRef<Identifier> overlays = file->getOverlayModuleNames(
mod, SourceLoc(), std::get<0>(pair));
if (std::find(overlays.begin(), overlays.end(),
overlay->getName()) != overlays.end())
return true;
}
return false;
});
return ret != modCrossImports.end() ? ret->first : Identifier();
}
}
std::pair<ModuleDecl *, Identifier>
ModuleDecl::getDeclaringModuleAndBystander() {
if (declaringModuleAndBystander)
return *declaringModuleAndBystander;
if (!hasUnderscoredNaming())
return *(declaringModuleAndBystander = {nullptr, Identifier()});
// If this is one of the stdlib overlays, indicate as much.
auto &ctx = getASTContext();
if (llvm::is_contained(ctx.StdlibOverlayNames, getRealName()))
return *(declaringModuleAndBystander = { ctx.getStdlibModule(),
Identifier() });
// Search the transitive set of imported @_exported modules to see if any have
// this module as their overlay.
SmallPtrSet<ModuleDecl *, 16> seen;
SmallVector<ImportedModule, 16> imported;
SmallVector<ImportedModule, 16> furtherImported;
ModuleDecl *overlayModule = this;
getImportedModules(imported, ModuleDecl::ImportFilterKind::Exported);
while (!imported.empty()) {
ModuleDecl *importedModule = imported.back().importedModule;
imported.pop_back();
if (!seen.insert(importedModule).second)
continue;
Identifier bystander = getBystanderIfDeclaring(
importedModule, overlayModule, importedModule->declaredCrossImports);
if (!bystander.empty())
return *(declaringModuleAndBystander = {importedModule, bystander});
// Also check the imported module's underlying module if it's a traditional
// overlay (i.e. not a cross-import overlay).
if (auto *clangModule = importedModule->getUnderlyingModuleIfOverlay()) {
Identifier bystander = getBystanderIfDeclaring(
clangModule, overlayModule, clangModule->declaredCrossImports);
if (!bystander.empty())
return *(declaringModuleAndBystander = {clangModule, bystander});
}
if (!importedModule->hasUnderscoredNaming())
continue;
furtherImported.clear();
importedModule->getImportedModules(furtherImported,
ModuleDecl::ImportFilterKind::Exported);
imported.append(furtherImported.begin(), furtherImported.end());
}
return *(declaringModuleAndBystander = {nullptr, Identifier()});
}
bool ModuleDecl::isClangOverlayOf(ModuleDecl *potentialUnderlying) const {
return getUnderlyingModuleIfOverlay() == potentialUnderlying;
}
bool ModuleDecl::isSameModuleLookingThroughOverlays(
ModuleDecl *other) {
if (this == other) {
return true;
}
if (this->isClangOverlayOf(other) || other->isClangOverlayOf(this)) {
return true;
}
return false;
}
bool ModuleDecl::isCrossImportOverlayOf(ModuleDecl *other) {
ModuleDecl *current = this;
ModuleDecl *otherClang = other->getUnderlyingModuleIfOverlay();
while ((current = current->getDeclaringModuleAndBystander().first)) {
if (current == other || current == otherClang)
return true;
}
return false;
}
ModuleDecl *ModuleDecl::getDeclaringModuleIfCrossImportOverlay() {
ModuleDecl *current = this, *declaring = nullptr;
while ((current = current->getDeclaringModuleAndBystander().first))
declaring = current;
return declaring;
}
bool ModuleDecl::getRequiredBystandersIfCrossImportOverlay(
ModuleDecl *declaring, SmallVectorImpl<Identifier> &bystanderNames) {
auto *clangModule = declaring->getUnderlyingModuleIfOverlay();
auto current = std::make_pair(this, Identifier());
while ((current = current.first->getDeclaringModuleAndBystander()).first) {
if (!current.second.empty())
bystanderNames.push_back(current.second);
if (current.first == declaring || current.first == clangModule)
return true;
}
return false;
}
Identifier ModuleDecl::getNameForModuleSelector() {
if (auto declaring = getDeclaringModuleIfCrossImportOverlay())
return declaring->getName();
return this->getName();
}
bool ModuleDecl::isClangHeaderImportModule() const {
auto importer = getASTContext().getClangModuleLoader();
if (!importer)
return false;
return this == importer->getImportedHeaderModule();
}
namespace {
struct OverlayFileContents {
struct Module {
std::string name;
};
unsigned version;
std::vector<Module> modules;
static llvm::ErrorOr<OverlayFileContents>
load(std::unique_ptr<llvm::MemoryBuffer> input,
SmallVectorImpl<std::string> &errorMessages);
};
} // end anonymous namespace
namespace llvm {
namespace yaml {
template <>
struct MappingTraits<OverlayFileContents::Module> {
static void mapping(IO &io, OverlayFileContents::Module &module) {
io.mapRequired("name", module.name);
}
};
template <>
struct SequenceElementTraits<OverlayFileContents::Module> {
static const bool flow = false;
};
template <>
struct MappingTraits<OverlayFileContents> {
static void mapping(IO &io, OverlayFileContents &contents) {
io.mapRequired("version", contents.version);
io.mapRequired("modules", contents.modules);
}
};
}
} // end namespace 'llvm'
static void pushYAMLError(const llvm::SMDiagnostic &diag, void *Context) {
auto &errorMessages = *static_cast<SmallVectorImpl<std::string> *>(Context);
errorMessages.emplace_back(diag.getMessage());
}
llvm::ErrorOr<OverlayFileContents>
OverlayFileContents::load(std::unique_ptr<llvm::MemoryBuffer> input,
SmallVectorImpl<std::string> &errorMessages) {
llvm::yaml::Input yamlInput(input->getBuffer(), /*Ctxt=*/nullptr,
pushYAMLError, &errorMessages);
OverlayFileContents contents;
yamlInput >> contents;
if (auto error = yamlInput.error())
return error;
if (contents.version > 1) {
std::string message = (Twine("key 'version' has invalid value: ") + Twine(contents.version)).str();
errorMessages.emplace_back(std::move(message));
return make_error_code(std::errc::result_out_of_range);
}
return contents;
}
bool
OverlayFile::loadOverlayModuleNames(ASTContext &ctx, StringRef module,
StringRef bystanderName,
SourceLoc diagLoc) {
llvm::vfs::FileSystem &fs = *ctx.SourceMgr.getFileSystem();
auto bufOrError = fs.getBufferForFile(filePath);
if (!bufOrError) {
ctx.Diags.diagnose(diagLoc, diag::cannot_load_swiftoverlay_file,
module, bystanderName,
bufOrError.getError().message(), filePath);
return false;
}
SmallVector<std::string, 4> errorMessages;
auto contentsOrErr = OverlayFileContents::load(std::move(bufOrError.get()),
errorMessages);
if (!contentsOrErr) {
if (errorMessages.empty())
errorMessages.push_back(contentsOrErr.getError().message());
for (auto message : errorMessages)
ctx.Diags.diagnose(diagLoc, diag::cannot_load_swiftoverlay_file,
module, bystanderName, message, filePath);
return false;
}
auto contents = std::move(*contentsOrErr);
for (const auto &module : contents.modules) {
auto moduleIdent = ctx.getIdentifier(module.name);
overlayModuleNames.push_back(moduleIdent);
}
return true;
}
bool
OverlayFile::loadOverlayModuleNames(const ModuleDecl *M, SourceLoc diagLoc,
Identifier bystanderName) {
return loadOverlayModuleNames(M->getASTContext(),
M->getName().str(),
bystanderName.str(),
diagLoc);
}
//===----------------------------------------------------------------------===//
// SourceFile Implementation
//===----------------------------------------------------------------------===//
void SourceFile::print(raw_ostream &OS, const PrintOptions &PO) {
StreamPrinter Printer(OS);
print(Printer, PO);
}
void SourceFile::print(ASTPrinter &Printer, const PrintOptions &PO) {
std::set<DeclKind> MajorDeclKinds = {DeclKind::Class, DeclKind::Enum,
DeclKind::Extension, DeclKind::Protocol, DeclKind::Struct};
SmallVector<Decl *> topLevelDecls;
getTopLevelDeclsWithAuxiliaryDecls(topLevelDecls);
for (auto decl : topLevelDecls) {
if (!decl->shouldPrintInContext(PO))
continue;
// For a major decl, we print an empty line before it.
if (MajorDeclKinds.find(decl->getKind()) != MajorDeclKinds.end())
Printer << "\n";
if (decl->print(Printer, PO))
Printer << "\n";
}
}
void
SourceFile::setImports(ArrayRef<AttributedImport<ImportedModule>> imports) {
assert(!Imports && "Already computed imports");
Imports = getASTContext().AllocateCopy(imports);
if (getASTContext().LangOpts.DumpSourceFileImports) {
llvm::errs() << "imports for " << getFilename() << ":\n";
for (auto Import : imports)
llvm::errs() << "\t" << Import.module.importedModule->getName() << "\n";
}
}
std::optional<AttributedImport<ImportedModule>>
SourceFile::findImport(const ModuleDecl *module) const {
return evaluateOrDefault(getASTContext().evaluator,
ImportDeclRequest{this, module}, std::nullopt);
}
std::optional<AttributedImport<ImportedModule>>
ImportDeclRequest::evaluate(Evaluator &evaluator, const SourceFile *sf,
const ModuleDecl *module) const {
auto &ctx = sf->getASTContext();
auto imports = sf->getImports();
auto mutModule = const_cast<ModuleDecl *>(module);
// Look to see if the owning module was directly imported.
for (const auto &import : imports) {
if (import.module.importedModule
->isSameModuleLookingThroughOverlays(mutModule))
return import;
}
// Now look for transitive imports.
auto &importCache = ctx.getImportCache();
for (const auto &import : imports) {
auto &importSet = importCache.getImportSet(import.module.importedModule);
for (const auto &transitive : importSet.getTransitiveImports()) {
if (transitive.importedModule
->isSameModuleLookingThroughOverlays(mutModule)) {
return import;
}
}
}
return std::nullopt;
}
bool SourceFile::hasImportUsedPreconcurrency(
AttributedImport<ImportedModule> import) const {
return PreconcurrencyImportsUsed.count(import) != 0;
}
void SourceFile::setImportUsedPreconcurrency(
AttributedImport<ImportedModule> import) {
PreconcurrencyImportsUsed.insert(import);
}
AccessLevel
SourceFile::getMaxAccessLevelUsingImport(
const ModuleDecl *mod) const {
auto known = ImportsUseAccessLevel.find(mod);
if (known == ImportsUseAccessLevel.end())
return AccessLevel::Internal;
return known->second;
}
void SourceFile::registerRequiredAccessLevelForModule(ModuleDecl *mod,
AccessLevel accessLevel) {
auto known = ImportsUseAccessLevel.find(mod);
if (known == ImportsUseAccessLevel.end())
ImportsUseAccessLevel[mod] = accessLevel;
else
ImportsUseAccessLevel[mod] = std::max(accessLevel, known->second);
// Also register modules triggering the import of cross-import overlays.
auto declaringMod = mod->getDeclaringModuleIfCrossImportOverlay();
if (!declaringMod)
return;
SmallVector<Identifier, 1> bystanders;
auto bystandersValid =
mod->getRequiredBystandersIfCrossImportOverlay(declaringMod, bystanders);
if (!bystandersValid)
return;
for (auto &otherImport : *Imports) {
auto otherImportMod = otherImport.module.importedModule;
auto otherImportModName = otherImportMod->getName();
if (otherImportMod == declaringMod ||
llvm::find(bystanders, otherImportModName) != bystanders.end()) {
registerRequiredAccessLevelForModule(otherImportMod, accessLevel);
}
}
}
bool HasImportsMatchingFlagRequest::evaluate(Evaluator &evaluator,
SourceFile *SF,
ImportFlags flag) const {
for (auto desc : SF->getImports()) {
if (desc.options.contains(flag))
return true;
}
return false;
}
std::optional<bool> HasImportsMatchingFlagRequest::getCachedResult() const {
SourceFile *sourceFile = std::get<0>(getStorage());
ImportFlags flag = std::get<1>(getStorage());
if (sourceFile->validCachedImportOptions.contains(flag))
return sourceFile->cachedImportOptions.contains(flag);
return std::nullopt;
}
void HasImportsMatchingFlagRequest::cacheResult(bool value) const {
SourceFile *sourceFile = std::get<0>(getStorage());
ImportFlags flag = std::get<1>(getStorage());
sourceFile->validCachedImportOptions |= flag;
if (value)
sourceFile->cachedImportOptions |= flag;
}
void swift::simple_display(llvm::raw_ostream &out, ImportOptions options) {
using Flag = std::pair<ImportFlags, StringRef>;
Flag possibleFlags[] = {
#define FLAG(Name) {ImportFlags::Name, #Name},
FLAG(Exported)
FLAG(Testable)
FLAG(PrivateImport)
FLAG(ImplementationOnly)
FLAG(SPIAccessControl)
FLAG(Preconcurrency)
FLAG(WeakLinked)
FLAG(Reserved)
#undef FLAG
};
auto flagsToPrint = llvm::make_filter_range(
possibleFlags, [&](Flag flag) { return options & flag.first; });
out << "{ ";
interleave(
flagsToPrint, [&](Flag flag) { out << flag.second; },
[&] { out << ", "; });
out << " }";
}
bool SourceFile::hasImportsWithFlag(ImportFlags flag) const {
auto &ctx = getASTContext();
auto *mutableThis = const_cast<SourceFile *>(this);
return evaluateOrDefault(
ctx.evaluator, HasImportsMatchingFlagRequest{mutableThis, flag}, false);
}
void SourceFile::forEachImportOfModule(
const ModuleDecl *module,
llvm::function_ref<void(AttributedImport<ImportedModule> &)> callback) {
for (auto import : *Imports) {
if (import.module.importedModule == module)
callback(import);
}
}
bool SourceFile::hasTestableOrPrivateImport(
AccessLevel accessLevel, const swift::ValueDecl *ofDecl,
SourceFile::ImportQueryKind queryKind) const {
auto *module = ofDecl->getModuleContext();
switch (accessLevel) {
case AccessLevel::Internal:
case AccessLevel::Package:
case AccessLevel::Public:
case AccessLevel::Open:
// internal/public access only needs an import marked as @_private. The
// filename does not need to match (and we don't serialize it for such
// decls).
return llvm::any_of(*Imports,
[module, queryKind](AttributedImport<ImportedModule> desc) -> bool {
if (queryKind == ImportQueryKind::TestableAndPrivate)
return desc.module.importedModule == module &&
(desc.options.contains(ImportFlags::PrivateImport) ||
desc.options.contains(ImportFlags::Testable));
else if (queryKind == ImportQueryKind::TestableOnly)
return desc.module.importedModule == module &&
desc.options.contains(ImportFlags::Testable);
else {
assert(queryKind == ImportQueryKind::PrivateOnly);
return desc.module.importedModule == module &&
desc.options.contains(ImportFlags::PrivateImport);
}
});
case AccessLevel::FilePrivate:
case AccessLevel::Private:
// Fallthrough.
break;
}
if (queryKind == ImportQueryKind::TestableOnly)
return false;
auto *DC = ofDecl->getDeclContext();
if (!DC)
return false;
auto *scope = DC->getModuleScopeContext();
if (!scope)
return false;
StringRef filename;
if (auto *file = dyn_cast<LoadedFile>(scope)) {
filename = file->getFilenameForPrivateDecl(ofDecl);
} else
return false;
if (filename.empty())
return false;
return llvm::any_of(*Imports,
[module, filename](AttributedImport<ImportedModule> desc) {
return desc.module.importedModule == module &&
desc.options.contains(ImportFlags::PrivateImport) &&
desc.sourceFileArg == filename;
});
}
// FIXME: This should probably be requestified.
RestrictedImportKind SourceFile::getRestrictedImportKind(const ModuleDecl *module) const {
auto &imports = getASTContext().getImportCache();
RestrictedImportKind importKind = RestrictedImportKind::MissingImport;
// Workaround for the cases where the bridging header isn't properly
// imported implicitly.
if (module->getName().str() == CLANG_HEADER_MODULE_NAME)
return RestrictedImportKind::None;
// Look at the imports of this source file.
for (auto &desc : *Imports) {
if (desc.options.contains(ImportFlags::ImplementationOnly)) {
if (importKind < RestrictedImportKind::ImplementationOnly &&
imports.isImportedBy(module, desc.module.importedModule))
importKind = RestrictedImportKind::ImplementationOnly;
}
else if (desc.options.contains(ImportFlags::SPIOnly)) {
if (importKind < RestrictedImportKind::SPIOnly &&
imports.isImportedBy(module, desc.module.importedModule))
importKind = RestrictedImportKind::SPIOnly;
}
// If the module is imported publicly, there's no restriction.
else if (imports.isImportedBy(module, desc.module.importedModule))
return RestrictedImportKind::None;
}
// Now check this file's enclosing module in case there are re-exports.
if (imports.isImportedBy(module, getParentModule()))
return RestrictedImportKind::None;
return importKind;
}
ImportAccessLevel
SourceFile::getImportAccessLevel(const ModuleDecl *targetModule) const {
assert(Imports.has_value());
// Leave it to the caller to avoid calling this service for a self import.
// We want to return AccessLevel::Public, but there's no import site to return.
assert(targetModule != getParentModule() &&
"getImportAccessLevel doesn't support checking for a self-import");
/// Order of relevancy of `import` to reach `targetModule` assuming the same
/// visibility level. Lower is better/more authoritative.
auto rateImport = [&](const ImportAccessLevel import) -> int {
auto importedModule = import->module.importedModule->getTopLevelModule();
// Prioritize public names:
if (targetModule->getExportAsName() == importedModule->getBaseIdentifier())
return 0;
if (targetModule->getPublicModuleName(/*onlyIfImported*/false) ==
importedModule->getName())
return 1;
// The defining module or overlay:
if (targetModule == importedModule)
return 2;
if (targetModule == importedModule->getUnderlyingModuleIfOverlay())
return 3;
// Any import in the sources:
if (import->importLoc.isValid()) {
// Prefer clang submodules to their top level modules:
if (import->module.importedModule != importedModule)
return 4;
return 5;
}
return 10;
};
// Find the import with the least restrictive access-level.
// Among those prioritize more relevant one.
auto &imports = getASTContext().getImportCache();
ImportAccessLevel restrictiveImport = std::nullopt;
for (auto &import : *Imports) {
auto importedModule = import.module.importedModule->getTopLevelModule();
if ((!restrictiveImport.has_value() ||
import.accessLevel > restrictiveImport->accessLevel ||
(import.accessLevel == restrictiveImport->accessLevel &&
rateImport(import) < rateImport(restrictiveImport))) &&
imports.isImportedBy(targetModule, importedModule)) {
restrictiveImport = import;
}
}
// Reexports from the local module take precedence over non-public imports
// and lift all access-level restrictions. We still prioritize file local
// public imports as diagnostics will have an import to point to and
// they are recommended over indirect imports.
if ((!restrictiveImport.has_value() ||
restrictiveImport->accessLevel < AccessLevel::Public) &&
!(restrictiveImport &&
restrictiveImport->module.importedModule->isClangHeaderImportModule()) &&
imports.isImportedBy(targetModule, getParentModule()))
return std::nullopt;
return restrictiveImport;
}
CharSourceRange
IfConfigClauseRangeInfo::getDirectiveRange(const SourceManager &SM) const {
return CharSourceRange(SM, DirectiveLoc, BodyLoc);
}
CharSourceRange
IfConfigClauseRangeInfo::getBodyRange(const SourceManager &SM) const {
return CharSourceRange(SM, BodyLoc, EndLoc);
}
CharSourceRange
IfConfigClauseRangeInfo::getWholeRange(const SourceManager &SM) const {
return CharSourceRange(SM, DirectiveLoc, EndLoc);
}
void SourceFile::recordIfConfigClauseRangeInfo(
const IfConfigClauseRangeInfo &range) {
#if SWIFT_BUILD_SWIFT_SYNTAX
// Don't record ranges; they'll be extracted from swift-syntax when needed.
#else
IfConfigClauseRanges.Ranges.push_back(range);
IfConfigClauseRanges.IsSorted = false;
#endif
}
void ModuleDecl::setPackageName(Identifier name) {
Package = PackageUnit::create(name, *this, getASTContext());
}
bool ModuleDecl::isImportedImplementationOnly(const ModuleDecl *module,
bool assumeImported) const {
if (module == this) return false;
auto &imports = getASTContext().getImportCache();
// Look through non-implementation-only imports to see if module is imported
// in some other way. Otherwise we assume it's implementation-only imported.
ModuleDecl::ImportFilter filter = {
ModuleDecl::ImportFilterKind::Exported,
ModuleDecl::ImportFilterKind::Default,
ModuleDecl::ImportFilterKind::PackageOnly,
ModuleDecl::ImportFilterKind::SPIOnly,
ModuleDecl::ImportFilterKind::ShadowedByCrossImportOverlay};
SmallVector<ImportedModule, 4> results;
getImportedModules(results, filter);
for (auto &desc : results) {
if (imports.isImportedBy(module, desc.importedModule))
return false;
}
if (assumeImported)
return true;
results.clear();
getImportedModules(results,
{ModuleDecl::ImportFilterKind::ImplementationOnly});
for (auto &desc : results)
if (imports.isImportedBy(module, desc.importedModule))
return true;
return false;
}
void SourceFile::lookupImportedSPIGroups(
const ModuleDecl *importedModule,
llvm::SmallSetVector<Identifier, 4> &spiGroups) const {
auto &imports = getASTContext().getImportCache();
for (auto &import : *Imports) {
if (import.options.contains(ImportFlags::SPIAccessControl) &&
(importedModule == import.module.importedModule ||
imports.isImportedByViaSwiftOnly(importedModule,
import.module.importedModule))) {
spiGroups.insert(import.spiGroups.begin(), import.spiGroups.end());
}
}
}
bool SourceFile::isModuleImportedPreconcurrency(
const ModuleDecl *importedModule) const {
auto &imports = getASTContext().getImportCache();
for (auto &import : *Imports) {
if (import.options.contains(ImportFlags::Preconcurrency) &&
(importedModule == import.module.importedModule ||
imports.isImportedByViaSwiftOnly(importedModule,
import.module.importedModule))) {
return true;
}
}
return false;
}
bool shouldImplicitImportAsSPI(ArrayRef<Identifier> spiGroups) {
for (auto group : spiGroups) {
if (group.empty())
return true;
}
return false;
}
bool SourceFile::isImportedAsSPI(const ValueDecl *targetDecl) const {
auto targetModule = targetDecl->getModuleContext();
llvm::SmallSetVector<Identifier, 4> importedSPIGroups;
// Objective-C SPIs are always imported implicitly.
if (targetDecl->hasClangNode())
return !targetDecl->getSPIGroups().empty();
if (shouldImplicitImportAsSPI(targetDecl->getSPIGroups()))
return true;
if (hasTestableOrPrivateImport(AccessLevel::Public, targetDecl, PrivateOnly))
return true;
lookupImportedSPIGroups(targetModule, importedSPIGroups);
if (importedSPIGroups.empty())
return false;
auto declSPIGroups = targetDecl->getSPIGroups();
for (auto declSPI : declSPIGroups)
if (importedSPIGroups.count(declSPI))
return true;
return false;
}
bool ModuleDecl::isImportedAsSPI(const AbstractSpecializeAttr *attr,
const ValueDecl *targetDecl) const {
auto declSPIGroups = attr->getSPIGroups();
if (shouldImplicitImportAsSPI(declSPIGroups))
return true;
auto targetModule = targetDecl->getModuleContext();
llvm::SmallSetVector<Identifier, 4> importedSPIGroups;
lookupImportedSPIGroups(targetModule, importedSPIGroups);
if (importedSPIGroups.empty()) return false;
for (auto declSPI : declSPIGroups)
if (importedSPIGroups.count(declSPI))
return true;
return false;
}
bool ModuleDecl::isImportedAsSPI(Identifier spiGroup,
const ModuleDecl *fromModule) const {
if (shouldImplicitImportAsSPI({spiGroup}))
return true;
llvm::SmallSetVector<Identifier, 4> importedSPIGroups;
lookupImportedSPIGroups(fromModule, importedSPIGroups);
if (importedSPIGroups.empty())
return false;
return importedSPIGroups.count(spiGroup);
}
bool ModuleDecl::isImportedAsWeakLinked(const ModuleDecl *module) const {
return getASTContext().getImportCache().isWeakImportedBy(module, this);
}
bool Decl::isSPI() const {
return !getSPIGroups().empty();
}
ArrayRef<Identifier> Decl::getSPIGroups() const {
const Decl *D = getAbstractSyntaxDeclForAttributes();
if (!isa<ValueDecl>(D) &&
!isa<ExtensionDecl>(D))
return ArrayRef<Identifier>();
return evaluateOrDefault(getASTContext().evaluator,
SPIGroupsRequest{ D },
ArrayRef<Identifier>());
}
llvm::ArrayRef<Identifier>
SPIGroupsRequest::evaluate(Evaluator &evaluator, const Decl *decl) const {
// Applies only to public ValueDecls and ExtensionDecls.
assert (isa<ValueDecl>(decl) ||
isa<ExtensionDecl>(decl));
// ABI decls share the SPI groups of their API decl.
auto abiRole = ABIRoleInfo(decl);
if (!abiRole.providesAPI() && abiRole.getCounterpart())
return abiRole.getCounterpart()->getSPIGroups();
// First, look for local attributes.
llvm::SetVector<Identifier> spiGroups;
for (auto attr : decl->getAttrs().getAttributes<SPIAccessControlAttr>())
for (auto spi : attr->getSPIGroups())
spiGroups.insert(spi);
// Backing storage for a wrapped property gets the SPI groups from the
// original property.
if (auto varDecl = dyn_cast<VarDecl>(decl))
if (auto originalDecl = varDecl->getOriginalWrappedProperty()) {
auto originalSPIs = originalDecl->getSPIGroups();
spiGroups.insert(originalSPIs.begin(), originalSPIs.end());
}
// Accessors get the SPI groups from the PBD.
if (auto AD = dyn_cast<AccessorDecl>(decl))
if (auto VD = dyn_cast<VarDecl>(AD->getStorage()))
if (auto *PBD = VD->getParentPatternBinding()) {
auto moreGroups = PBD->getSPIGroups();
spiGroups.insert(moreGroups.begin(), moreGroups.end());
}
// If there is no local SPI information, look at the context.
if (spiGroups.empty()) {
// Then in the extended nominal type.
if (auto extension = dyn_cast<ExtensionDecl>(decl)) {
if (auto extended = extension->getExtendedNominal()) {
auto extSPIs = extended->getSPIGroups();
if (!extSPIs.empty()) return extSPIs;
}
}
// And finally in the parent context.
auto parent = decl->getDeclContext();
if (auto parentD = parent->getAsDecl()) {
if (!isa<ModuleDecl>(parentD)) {
return parentD->getSPIGroups();
}
}
}
auto &ctx = decl->getASTContext();
return ctx.AllocateCopy(spiGroups.getArrayRef());
}
LibraryLevel ModuleDecl::getLibraryLevel() const {
return evaluateOrDefault(getASTContext().evaluator,
ModuleLibraryLevelRequest{this},
LibraryLevel::Other);
}
LibraryLevel
ModuleLibraryLevelRequest::evaluate(Evaluator &evaluator,
const ModuleDecl *module) const {
auto &ctx = module->getASTContext();
namespace path = llvm::sys::path;
SmallString<128> scratch;
/// Is \p path under the folder SDK/a/b/c/d/e?
auto hasSDKPrefix =
[&](StringRef path, const Twine &a, const Twine &b = "",
const Twine &c = "", const Twine &d = "", const Twine &e = "") {
scratch = ctx.SearchPathOpts.getSDKPath();
path::append(scratch, a, b, c, d);
path::append(scratch, e);
return path.starts_with(scratch);
};
/// Is \p modulePath from System/Library/PrivateFrameworks/?
auto fromPrivateFrameworks = [&](StringRef modulePath) -> bool {
if (!ctx.LangOpts.Target.isOSDarwin()) return false;
return hasSDKPrefix(modulePath, "AppleInternal", "Library", "Frameworks") ||
hasSDKPrefix(modulePath, "System", "Library", "PrivateFrameworks") ||
hasSDKPrefix(modulePath, "System", "iOSSupport", "System", "Library", "PrivateFrameworks") ||
hasSDKPrefix(modulePath, "usr", "local", "include");
};
if (module->isNonSwiftModule()) {
if (auto *underlying = module->findUnderlyingClangModule()) {
// Imported clangmodules are SPI if they are defined by a private
// modulemap or from the PrivateFrameworks folder in the SDK.
bool moduleIsSPI = underlying->ModuleMapIsPrivate ||
fromPrivateFrameworks(underlying->PresumedModuleMapFile);
return moduleIsSPI ? LibraryLevel::SPI : LibraryLevel::API;
}
return LibraryLevel::Other;
} else if (module->isMainModule()) {
// The current compilation target.
return ctx.LangOpts.LibraryLevel;
} else {
// Other Swift modules are SPI if they are from the PrivateFrameworks
// folder in the SDK.
auto modulePath = module->getModuleFilename();
return fromPrivateFrameworks(modulePath) ?
LibraryLevel::SPI : LibraryLevel::API;
}
}
bool SourceFile::shouldCrossImport() const {
return Kind != SourceFileKind::SIL && Kind != SourceFileKind::Interface &&
getASTContext().LangOpts.EnableCrossImportOverlays;
}
void ModuleDecl::clearLookupCache() {
getASTContext().getImportCache().clear();
setIsObjCNameLookupCachePopulated(false);
ObjCNameLookupCache.clear();
if (!Cache)
return;
// Abandon any current cache. We'll rebuild it on demand.
Cache.reset();
}
void
SourceFile::cacheVisibleDecls(SmallVectorImpl<ValueDecl*> &&globals) const {
SmallVectorImpl<ValueDecl*> &cached = getCache().AllVisibleValues;
cached = std::move(globals);
}
const SmallVectorImpl<ValueDecl *> &
SourceFile::getCachedVisibleDecls() const {
return getCache().AllVisibleValues;
}
llvm::StringMap<SourceFilePathInfo>
SourceFile::getInfoForUsedFilePaths() const {
llvm::StringMap<SourceFilePathInfo> result;
result[getFilename()].physicalFileLoc =
getASTContext().SourceMgr.getLocForBufferStart(BufferID);
for (auto &vpath : VirtualFilePaths) {
result[vpath.Item].virtualFileLocs.insert(vpath.Loc);
}
return result;
}
/// Returns a map of filenames to a map of file paths to SourceFilePathInfo
/// instances, for all SourceFiles in the module.
static llvm::StringMap<llvm::StringMap<SourceFilePathInfo>>
getInfoForUsedFileNames(const ModuleDecl *module) {
llvm::StringMap<llvm::StringMap<SourceFilePathInfo>> result;
for (auto *file : module->getFiles()) {
auto *sourceFile = dyn_cast<SourceFile>(file);
if (!sourceFile) continue;
for (auto &pair : sourceFile->getInfoForUsedFilePaths()) {
StringRef fullPath = pair.first();
StringRef fileName = llvm::sys::path::filename(fullPath);
auto &info = pair.second;
result[fileName][fullPath].merge(info);
}
}
return result;
}
static void computeFileID(const ModuleDecl *module, StringRef name,
SmallVectorImpl<char> &result) {
// The module might alias itself (e.g., to use a raw identifier as the name
// that it references itself with in its own source code), so we need to look
// that up.
Identifier moduleName = module->getASTContext().getRealModuleName(
module->getName(),
ASTContext::ModuleAliasLookupOption::aliasFromRealName);
if (moduleName.mustAlwaysBeEscaped()) {
result.push_back('`');
result.append(moduleName.str().begin(), moduleName.str().end());
result.push_back('`');
} else {
result.assign(moduleName.str().begin(), moduleName.str().end());
}
result.push_back('/');
result.append(name.begin(), name.end());
}
static StringRef
resolveFileIDConflicts(const ModuleDecl *module, StringRef fileString,
const llvm::StringMap<SourceFilePathInfo> &paths,
bool shouldDiagnose) {
assert(paths.size() > 1);
/// The path we consider to be "correct"; we will emit fix-its changing the
/// other paths to match this one.
StringRef winner = "";
// First, select a winner.
for (const auto &pathPair : paths) {
// If there is a physical file with this name, we use its path and stop
// looking.
if (pathPair.second.physicalFileLoc.isValid()) {
winner = pathPair.first();
break;
}
// Otherwise, we favor the lexicographically "smaller" path.
if (winner.empty() || winner > pathPair.first()) {
winner = pathPair.first();
}
}
// If we're not diagnosing, that's all we need to do.
if (!shouldDiagnose)
return winner;
SmallString<64> winnerLiteral;
llvm::raw_svector_ostream winnerLiteralStream{winnerLiteral};
swift::printAsQuotedString(winnerLiteralStream, winner);
auto &diags = module->getASTContext().Diags;
// Diagnose the conflict at each #sourceLocation that specifies it.
for (const auto &pathPair : paths) {
bool isWinner = (pathPair.first() == winner);
// Don't diagnose #sourceLocations that match the physical file.
if (pathPair.second.physicalFileLoc.isValid()) {
if (!isWinner) {
// The driver is responsible for diagnosing this, but naughty people who
// have directly invoked the frontend could make it happen here instead.
StringRef filename = llvm::sys::path::filename(winner);
diags.diagnose(SourceLoc(), diag::error_two_files_same_name,
filename, winner, pathPair.first());
diags.diagnose(SourceLoc(), diag::note_explain_two_files_same_name);
}
continue;
}
for (auto loc : pathPair.second.virtualFileLocs) {
diags.diagnose(loc,
diag::source_location_creates_file_id_conflicts,
fileString);
// Offer a fix-it unless it would be tautological.
if (!isWinner)
diags.diagnose(loc, diag::fixit_correct_source_location_file, winner)
.fixItReplace(loc, winnerLiteral);
}
}
return winner;
}
llvm::StringMap<std::pair<std::string, bool>>
ModuleDecl::computeFileIDMap(bool shouldDiagnose) const {
llvm::StringMap<std::pair<std::string, bool>> result;
SmallString<64> scratch;
for (auto &namePair : getInfoForUsedFileNames(this)) {
computeFileID(this, namePair.first(), scratch);
auto &infoForPaths = namePair.second;
assert(!infoForPaths.empty());
// TODO: In the future, we'd like to handle these conflicts gracefully by
// generating a unique `#fileID` string for each conflicting name. For now,
// we will simply warn about conflicts.
StringRef winner = infoForPaths.begin()->first();
if (infoForPaths.size() > 1)
winner = resolveFileIDConflicts(this, scratch, infoForPaths,
shouldDiagnose);
for (auto &pathPair : infoForPaths) {
result[pathPair.first()] =
std::make_pair(scratch.str().str(), pathPair.first() == winner);
}
}
return result;
}
SourceFile::SourceFile(ModuleDecl &M, SourceFileKind K,
unsigned bufferID,
ParsingOptions parsingOpts, bool isPrimary)
: FileUnit(FileUnitKind::Source, M), BufferID(bufferID),
ParsingOpts(parsingOpts), IsPrimary(isPrimary), Kind(K) {
assert(BufferID != (unsigned)~0);
M.getASTContext().addDestructorCleanup(*this);
assert(!IsPrimary || M.isMainModule() &&
"A primary cannot appear outside the main module");
if (isScriptMode()) {
bool problem = M.registerEntryPointFile(this, SourceLoc(), std::nullopt);
assert(!problem && "multiple main files?");
(void)problem;
}
M.getASTContext().SourceMgr.recordSourceFile(bufferID, this);
}
SourceFile::ParsingOptions
SourceFile::getDefaultParsingOptions(const LangOptions &langOpts) {
ParsingOptions opts;
if (langOpts.DisablePoundIfEvaluation)
opts |= ParsingFlags::DisablePoundIfEvaluation;
if (langOpts.CollectParsedToken)
opts |= ParsingFlags::CollectParsedTokens;
if (langOpts.hasFeature(Feature::ParserRoundTrip))
opts |= ParsingFlags::RoundTrip;
if (langOpts.hasFeature(Feature::ParserValidation))
opts |= ParsingFlags::ValidateNewParserDiagnostics;
return opts;
}
ArrayRef<Token> SourceFile::getAllTokens() const {
assert(shouldCollectTokens() && "Disabled");
auto &eval = getASTContext().evaluator;
auto *mutableThis = const_cast<SourceFile *>(this);
return *evaluateOrDefault(eval, ParseSourceFileRequest{mutableThis}, {})
.CollectedTokens;
}
bool SourceFile::shouldCollectTokens() const {
return Kind != SourceFileKind::SIL &&
ParsingOpts.contains(ParsingFlags::CollectParsedTokens);
}
bool SourceFile::hasDelayedBodyParsing() const {
if (ParsingOpts.contains(ParsingFlags::DisableDelayedBodies))
return false;
// Not supported right now.
if (Kind == SourceFileKind::SIL)
return false;
if (shouldCollectTokens())
return false;
return true;
}
/// Add a hoisted declaration. See Decl::isHoisted().
void SourceFile::addHoistedDecl(Decl *d) {
assert(d->isHoisted());
Hoisted.push_back(d);
}
ArrayRef<Decl *> SourceFile::getTopLevelDecls() const {
auto &ctx = getASTContext();
auto *mutableThis = const_cast<SourceFile *>(this);
return evaluateOrDefault(
ctx.evaluator, ParseTopLevelDeclsRequest{mutableThis}, {});
}
void SourceFile::addTopLevelDecl(Decl *d) {
// Force decl parsing if we haven't already.
(void)getTopLevelItems();
Items->push_back(d);
// FIXME: This violates core properties of the evaluator.
auto &ctx = getASTContext();
auto *mutableThis = const_cast<SourceFile *>(this);
ctx.evaluator.clearCachedOutput(ParseTopLevelDeclsRequest{mutableThis});
}
void SourceFile::prependTopLevelDecl(Decl *d) {
// Force decl parsing if we haven't already.
(void)getTopLevelItems();
Items->insert(Items->begin(), d);
// FIXME: This violates core properties of the evaluator.
auto &ctx = getASTContext();
auto *mutableThis = const_cast<SourceFile *>(this);
ctx.evaluator.clearCachedOutput(ParseTopLevelDeclsRequest{mutableThis});
}
void SourceFile::addDelayedFunction(AbstractFunctionDecl *AFD) {
// If we defer type checking to runtime, we won't
// have to type check `AFD` ahead of time
auto &Ctx = getASTContext();
if (Ctx.TypeCheckerOpts.DeferToRuntime &&
Ctx.LangOpts.hasFeature(Feature::LazyImmediate))
return;
DelayedFunctions.push_back(AFD);
}
void SourceFile::typeCheckDelayedFunctions() {
for (unsigned i = 0; i < DelayedFunctions.size(); i++) {
auto *AFD = DelayedFunctions[i];
assert(!AFD->getDeclContext()->isLocalContext());
AFD->getTypecheckedBody();
(void) AFD->getCaptureInfo();
}
DelayedFunctions.clear();
}
ArrayRef<ASTNode> SourceFile::getTopLevelItems() const {
auto &ctx = getASTContext();
auto *mutableThis = const_cast<SourceFile *>(this);
return evaluateOrDefault(ctx.evaluator, ParseSourceFileRequest{mutableThis},
{}).TopLevelItems;
}
ArrayRef<Decl *> SourceFile::getHoistedDecls() const {
return Hoisted;
}
void *SourceFile::getExportedSourceFile() const {
auto &eval = getASTContext().evaluator;
return evaluateOrDefault(eval, ExportedSourceFileRequest{this}, nullptr);
}
bool FileUnit::walk(ASTWalker &walker) {
SmallVector<Decl *, 64> Decls;
getTopLevelDecls(Decls);
llvm::SaveAndRestore<ASTWalker::ParentTy> SAR(walker.Parent,
getParentModule());
bool SkipInternal = getKind() == FileUnitKind::SerializedAST &&
!walker.shouldWalkSerializedTopLevelInternalDecls();
for (Decl *D : Decls) {
if (SkipInternal) {
// Ignore if the decl isn't visible
if (auto *VD = dyn_cast<ValueDecl>(D)) {
if (VD->getFormalAccess() < AccessLevel::Public)
continue;
}
// Also ignore if the extended nominal isn't visible
if (auto *ED = dyn_cast<ExtensionDecl>(D)) {
auto *ND = ED->getExtendedNominal();
if (ND && ND->getFormalAccess() < AccessLevel::Public)
continue;
}
}
#ifndef NDEBUG
PrettyStackTraceDecl debugStack("walking into decl", D);
#endif
if (D->walk(walker))
return true;
if (walker.shouldWalkAccessorsTheOldWay()) {
// Pretend that accessors share a parent with the storage.
//
// FIXME: Update existing ASTWalkers to deal with accessors appearing as
// children of the storage instead.
if (auto *ASD = dyn_cast<AbstractStorageDecl>(D)) {
for (auto AD : ASD->getAllAccessors()) {
if (AD->walk(walker))
return true;
}
}
}
}
return false;
}
bool SourceFile::walk(ASTWalker &walker) {
llvm::SaveAndRestore<ASTWalker::ParentTy> SAR(walker.Parent,
getParentModule());
for (auto Item : getTopLevelItems()) {
if (auto D = Item.dyn_cast<Decl *>()) {
if (D->walk(walker))
return true;
} else {
Item.walk(walker);
}
if (walker.shouldWalkAccessorsTheOldWay()) {
// Pretend that accessors share a parent with the storage.
//
// FIXME: Update existing ASTWalkers to deal with accessors appearing as
// children of the storage instead.
if (auto *ASD = dyn_cast_or_null<AbstractStorageDecl>(
Item.dyn_cast<Decl *>())) {
for (auto AD : ASD->getAllAccessors()) {
if (AD->walk(walker))
return true;
}
}
}
}
return false;
}
StringRef SourceFile::getFilename() const {
SourceManager &SM = getASTContext().SourceMgr;
return SM.getIdentifierForBuffer(BufferID);
}
StringRef SourceFile::getBuffer() const {
SourceManager &SM = getASTContext().SourceMgr;
return SM.getEntireTextForBuffer(BufferID);
}
ASTScope &SourceFile::getScope() {
if (!Scope)
Scope = new (getASTContext()) ASTScope(this);
return *Scope.get();
}
Identifier SourceFile::getPrivateDiscriminator(bool createIfMissing) const {
if (!PrivateDiscriminator.empty() || !createIfMissing)
return PrivateDiscriminator;
StringRef name = getFilename();
if (name.empty()) {
assert(1 == count_if(getParentModule()->getFiles(),
[](const FileUnit *FU) -> bool {
return isa<SourceFile>(FU) &&
cast<SourceFile>(FU)->getFilename().empty();
}) &&
"can't promise uniqueness if multiple source files are nameless");
// We still need a discriminator, so keep going.
}
// Use a hash of the basename of the source file as our discriminator.
// This keeps us from leaking information about the original filename
// while still providing uniqueness. Using the basename makes the
// discriminator invariant across source checkout locations.
// FIXME: Use a faster hash here? We don't need security, just uniqueness.
llvm::MD5 hash;
hash.update(getParentModule()->getName().str());
hash.update(llvm::sys::path::filename(name));
llvm::MD5::MD5Result result;
hash.final(result);
// Use the hash as a hex string, prefixed with an underscore to make sure
// it is a valid identifier.
// FIXME: There are more compact ways to encode a 16-byte value.
SmallString<33> buffer{"_"};
SmallString<32> hashString;
llvm::MD5::stringifyResult(result, hashString);
buffer += hashString;
PrivateDiscriminator = getASTContext().getIdentifier(buffer.str().upper());
return PrivateDiscriminator;
}
Identifier
SourceFile::getDiscriminatorForPrivateDecl(const Decl *D) const {
assert(D->getDeclContext()->getModuleScopeContext() == this ||
D->getDeclContext()->getModuleScopeContext() == getSynthesizedFile());
return getPrivateDiscriminator(/*createIfMissing=*/true);
}
SynthesizedFileUnit *FileUnit::getSynthesizedFile() const {
return cast_or_null<SynthesizedFileUnit>(SynthesizedFileAndKind.getPointer());
}
SynthesizedFileUnit &FileUnit::getOrCreateSynthesizedFile() {
auto SynthesizedFile = getSynthesizedFile();
if (!SynthesizedFile) {
if (auto thisSynth = dyn_cast<SynthesizedFileUnit>(this))
return *thisSynth;
SynthesizedFile = new (getASTContext()) SynthesizedFileUnit(*this);
SynthesizedFileAndKind.setPointer(SynthesizedFile);
}
return *SynthesizedFile;
}
AvailabilityScope *SourceFile::getAvailabilityScope() const {
return RootAvailabilityScope;
}
void SourceFile::setAvailabilityScope(AvailabilityScope *scope) {
RootAvailabilityScope = scope;
}
ArrayRef<OpaqueTypeDecl *> SourceFile::getOpaqueReturnTypeDecls() {
for (auto *vd : UnvalidatedDeclsWithOpaqueReturnTypes.takeVector()) {
if (vd->getDeclContext()->getInnermostSkippedFunctionContext()) {
// Ignore things in skipped functions.
continue;
}
if (auto opaqueDecl = vd->getOpaqueResultTypeDecl()) {
auto inserted = ValidatedOpaqueReturnTypes.insert(
{opaqueDecl->getOpaqueReturnTypeIdentifier().str(),
opaqueDecl});
if (inserted.second) {
OpaqueReturnTypes.push_back(opaqueDecl);
}
}
}
return OpaqueReturnTypes;
}
OpaqueTypeDecl *
SourceFile::lookupOpaqueResultType(StringRef MangledName) {
// Check already-validated decls.
auto found = ValidatedOpaqueReturnTypes.find(MangledName);
if (found != ValidatedOpaqueReturnTypes.end())
return found->second;
// If there are unvalidated decls with opaque types, go through and validate
// them now.
(void) getOpaqueReturnTypeDecls();
found = ValidatedOpaqueReturnTypes.find(MangledName);
if (found != ValidatedOpaqueReturnTypes.end())
return found->second;
// Otherwise, we don't have a matching opaque decl.
return nullptr;
}
bool SourceFile::isAsyncTopLevelSourceFile() const {
return isScriptMode() &&
(bool)evaluateOrDefault(getASTContext().evaluator,
GetSourceFileAsyncNode{this}, ASTNode());
}
ASTNode GetSourceFileAsyncNode::evaluate(Evaluator &eval,
const SourceFile *sf) const {
for (Decl *d : sf->getTopLevelDecls()) {
TopLevelCodeDecl *tld = dyn_cast<TopLevelCodeDecl>(d);
if (tld && tld->getBody()) {
if (ASTNode asyncNode = tld->getBody()->findAsyncNode())
return asyncNode;
}
}
return ASTNode();
}
ArrayRef<TypeDecl *> SourceFile::getLocalTypeDecls() const {
auto *mutableThis = const_cast<SourceFile *>(this);
return evaluateOrDefault(getASTContext().evaluator,
LocalTypeDeclsRequest{mutableThis}, {});
}
std::optional<SourceFile::FileIDStr>
SourceFile::FileIDStr::parse(StringRef fileID) {
auto names = fileID.split('/');
auto moduleName = names.first;
auto fileName = names.second;
if (moduleName.empty() || fileName.empty() || !fileName.ends_with(".swift") ||
fileName.contains('/'))
return {};
return {SourceFile::FileIDStr{/*.moduleName=*/moduleName,
/*.fileName=*/fileName}};
}
bool SourceFile::FileIDStr::matches(const SourceFile *file) const {
// Never match with SourceFiles that do not correpond to a file on disk
if (file->getFilename().empty())
return false;
return moduleName == file->getParentModule()->getNameStr() &&
fileName == llvm::sys::path::filename(file->getFilename());
}
std::optional<DefaultIsolation> SourceFile::getDefaultIsolation() const {
auto &ctx = getASTContext();
return evaluateOrDefault(
ctx.evaluator, DefaultIsolationInSourceFileRequest{this}, std::nullopt);
}
namespace {
class LocalTypeDeclCollector : public ASTWalker {
SmallVectorImpl<TypeDecl *> &results;
public:
LocalTypeDeclCollector(SmallVectorImpl<TypeDecl *> &results)
: results(results) {}
MacroWalking getMacroWalkingBehavior() const override {
return MacroWalking::Expansion;
}
PreWalkAction walkToDeclPre(Decl *D) override {
switch (D->getKind()) {
case DeclKind::Enum:
case DeclKind::Struct:
case DeclKind::Class:
case DeclKind::Protocol:
case DeclKind::TypeAlias:
if (D->getDeclContext()->isLocalContext())
results.push_back(cast<TypeDecl>(D));
break;
default:
break;
}
return Action::Continue();
}
};
} // namespace
ArrayRef<TypeDecl *> LocalTypeDeclsRequest::evaluate(Evaluator &evaluator,
SourceFile *sf) const {
SmallVector<TypeDecl *> results;
LocalTypeDeclCollector collector(results);
sf->walk(collector);
return sf->getASTContext().AllocateCopy(results);
}
//===----------------------------------------------------------------------===//
// SynthesizedFileUnit Implementation
//===----------------------------------------------------------------------===//
SynthesizedFileUnit::SynthesizedFileUnit(FileUnit &FU)
: FileUnit(FileUnitKind::Synthesized, *FU.getParentModule()), FU(FU) {
FU.getASTContext().addDestructorCleanup(*this);
}
Identifier
SynthesizedFileUnit::getDiscriminatorForPrivateDecl(const Decl *D) const {
assert(D->getDeclContext()->getModuleScopeContext() == this);
// Use cached primitive discriminator if it exists.
if (!PrivateDiscriminator.empty())
return PrivateDiscriminator;
// Start with the discriminator that the file we belong to would use.
auto ownerDiscriminator = getFileUnit().getDiscriminatorForPrivateDecl(D);
// Hash that with a special string to produce a different value that preserves
// the entropy of the original.
// TODO: Use a more robust discriminator for synthesized files. Pick something
// that cannot conflict with `SourceFile` discriminators.
llvm::MD5 hash;
hash.update(ownerDiscriminator.str());
hash.update("SYNTHESIZED FILE");
llvm::MD5::MD5Result result;
hash.final(result);
// Use the hash as a hex string, prefixed with an underscore to make sure
// it is a valid identifier.
// FIXME: There are more compact ways to encode a 16-byte value.
SmallString<33> buffer{"_"};
SmallString<32> hashString;
llvm::MD5::stringifyResult(result, hashString);
buffer += hashString;
PrivateDiscriminator = getASTContext().getIdentifier(buffer.str().upper());
return PrivateDiscriminator;
}
void SynthesizedFileUnit::lookupValue(
DeclName name, NLKind lookupKind,
OptionSet<ModuleLookupFlags> Flags,
SmallVectorImpl<ValueDecl *> &result) const {
for (auto *decl : TopLevelDecls) {
if (auto VD = dyn_cast<ValueDecl>(decl)) {
if (VD->getName().matchesRef(name) && ABIRoleInfo(VD).matchesOptions(Flags)) {
result.push_back(VD);
}
}
}
}
void SynthesizedFileUnit::lookupObjCMethods(
ObjCSelector selector,
SmallVectorImpl<AbstractFunctionDecl *> &results) const {
// Synthesized files only contain top-level declarations, no `@objc` methods.
}
void SynthesizedFileUnit::getTopLevelDecls(
SmallVectorImpl<swift::Decl *> &results) const {
results.append(TopLevelDecls.begin(), TopLevelDecls.end());
}
//===----------------------------------------------------------------------===//
// Miscellaneous
//===----------------------------------------------------------------------===//
void FileUnit::anchor() {}
void FileUnit::getTopLevelDeclsWhereAttributesMatch(
SmallVectorImpl<Decl*> &Results,
llvm::function_ref<bool(DeclAttributes)> matchAttributes) const {
auto prevSize = Results.size();
getTopLevelDecls(Results);
// Filter out unwanted decls that were just added to Results.
// Note: We could apply this check in all implementations of
// getTopLevelDecls instead or in everything that creates a Decl.
auto newEnd = std::remove_if(Results.begin() + prevSize, Results.end(),
[&matchAttributes](const Decl *D) -> bool {
return !matchAttributes(D->getAttrs());
});
Results.erase(newEnd, Results.end());
}
void FileUnit::getTopLevelDeclsWithAuxiliaryDecls(
SmallVectorImpl<Decl*> &results) const {
std::function<void(Decl *)> addResult;
addResult = [&](Decl *decl) {
results.push_back(decl);
decl->visitAuxiliaryDecls(addResult);
};
SmallVector<Decl *, 32> nonExpandedDecls;
nonExpandedDecls.reserve(results.capacity());
getTopLevelDecls(nonExpandedDecls);
for (auto *decl : nonExpandedDecls) {
addResult(decl);
}
}
void FileUnit::dumpDisplayDecls() const {
SmallVector<Decl *, 32> Decls;
getDisplayDecls(Decls);
for (auto *D : Decls) {
D->dump(llvm::errs());
}
}
void FileUnit::dumpTopLevelDecls() const {
SmallVector<Decl *, 32> Decls;
getTopLevelDecls(Decls);
for (auto *D : Decls) {
D->dump(llvm::errs());
}
}
void swift::simple_display(llvm::raw_ostream &out, const FileUnit *file) {
if (!file) {
out << "(null)";
return;
}
switch (file->getKind()) {
case FileUnitKind::Source:
out << '\"' << cast<SourceFile>(file)->getFilename() << '\"';
return;
case FileUnitKind::Builtin:
out << "(Builtin)";
return;
case FileUnitKind::Synthesized:
out << "(synthesized)";
return;
case FileUnitKind::DWARFModule:
case FileUnitKind::ClangModule:
case FileUnitKind::SerializedAST:
out << '\"' << cast<LoadedFile>(file)->getFilename() << '\"';
return;
}
llvm_unreachable("Unhandled case in switch");
}
StringRef LoadedFile::getFilename() const {
return "";
}
static const clang::Module *
getClangModule(llvm::PointerUnion<const ModuleDecl *, const void *> Union) {
return static_cast<const clang::Module *>(cast<const void *>(Union));
}
StringRef ModuleEntity::getName(bool useRealNameIfAliased) const {
assert(!Mod.isNull());
if (auto SwiftMod = Mod.dyn_cast<const ModuleDecl*>())
return useRealNameIfAliased ? SwiftMod->getRealName().str() : SwiftMod->getName().str();
return getClangModule(Mod)->Name;
}
std::string ModuleEntity::getFullName(bool useRealNameIfAliased) const {
assert(!Mod.isNull());
if (auto SwiftMod = Mod.dyn_cast<const ModuleDecl*>())
return std::string(useRealNameIfAliased ? SwiftMod->getRealName() : SwiftMod->getName());
return getClangModule(Mod)->getFullModuleName();
}
bool ModuleEntity::isSystemModule() const {
assert(!Mod.isNull());
if (auto SwiftMod = Mod.dyn_cast<const ModuleDecl*>())
return SwiftMod->isSystemModule();
return getClangModule(Mod)->IsSystem;
}
bool ModuleEntity::isNonUserModule() const {
assert(!Mod.isNull());
if (auto *SwiftMod = Mod.dyn_cast<const ModuleDecl *>())
return SwiftMod->isNonUserModule();
// TODO: Should handle clang modules as well
return getClangModule(Mod)->IsSystem;
}
bool ModuleEntity::isBuiltinModule() const {
assert(!Mod.isNull());
if (auto SwiftMod = Mod.dyn_cast<const ModuleDecl*>())
return SwiftMod->isBuiltinModule();
return false;
}
const ModuleDecl* ModuleEntity::getAsSwiftModule() const {
assert(!Mod.isNull());
if (auto SwiftMod = Mod.dyn_cast<const ModuleDecl*>())
return SwiftMod;
return nullptr;
}
const clang::Module* ModuleEntity::getAsClangModule() const {
assert(!Mod.isNull());
if (isa<const ModuleDecl *>(Mod))
return nullptr;
return getClangModule(Mod);
}
// See swift/Basic/Statistic.h for declaration: this enables tracing SourceFiles, is
// defined here to avoid too much layering violation / circular linkage
// dependency.
struct SourceFileTraceFormatter : public UnifiedStatsReporter::TraceFormatter {
void traceName(const void *Entity, raw_ostream &OS) const override {
if (!Entity)
return;
const SourceFile *SF = static_cast<const SourceFile *>(Entity);
OS << llvm::sys::path::filename(SF->getFilename());
}
void traceLoc(const void *Entity, SourceManager *SM,
clang::SourceManager *CSM, raw_ostream &OS) const override {
// SourceFiles don't have SourceLocs of their own; they contain them.
}
};
static SourceFileTraceFormatter TF;
template<>
const UnifiedStatsReporter::TraceFormatter*
FrontendStatsTracer::getTraceFormatter<const SourceFile *>() {
return &TF;
}
bool IsNonUserModuleRequest::evaluate(Evaluator &evaluator, ModuleDecl *mod) const {
// If there's no SDK path, fallback to checking whether the module was
// in the system search path or a clang system module
auto &ctx = mod->getASTContext();
SearchPathOptions &searchPathOpts = ctx.SearchPathOpts;
StringRef sdkPath = searchPathOpts.getSDKPath();
if (sdkPath.empty() && mod->isSystemModule())
return true;
// Some temporary module's get created with no module name and they have no
// files. Avoid running `getFiles` on them (which will assert if there
// aren't any).
if (!mod->hasName() || mod->getFiles().empty())
return false;
StringRef modulePath;
auto fileUnit = mod->getFiles().front();
if (auto *LF = dyn_cast_or_null<LoadedFile>(fileUnit)) {
modulePath = LF->getSourceFilename();
} else if (auto *SF = dyn_cast_or_null<SourceFile>(fileUnit)) {
// Checking for SourceFiles lets custom tools get the correct is-system
// state for index units when compiling a textual interface directly.
modulePath = SF->getFilename();
}
if (modulePath.empty())
return false;
// If we have a platform path, check against that as it will be a parent of
// the SDK path.
auto *FS = ctx.SourceMgr.getFileSystem().get();
auto sdkOrPlatform = searchPathOpts.getSDKPlatformPath(FS).value_or(sdkPath);
StringRef runtimePath = searchPathOpts.RuntimeResourcePath;
if (!runtimePath.empty() && pathStartsWith(runtimePath, modulePath)) {
return true;
}
if (!sdkOrPlatform.empty() && pathStartsWith(sdkOrPlatform, modulePath)) {
return true;
}
// `getSDKPlatformPath` returns a real path but the module might have path
// inside a symlink pointing to that real path. To catch this case, also check
// whether the module's real path is inside the SDK's real path.
llvm::SmallString<128> moduleRealPath;
if (FS->getRealPath(modulePath, moduleRealPath)) {
modulePath = moduleRealPath;
}
if (!runtimePath.empty() && pathStartsWith(runtimePath, moduleRealPath)) {
return true;
}
if (!sdkOrPlatform.empty() && pathStartsWith(sdkOrPlatform, moduleRealPath)) {
return true;
}
return false;
}
evaluator::SideEffect CustomDerivativesRequest::evaluate(Evaluator &evaluator,
SourceFile *sf) const {
ModuleDecl *module = sf->getParentModule();
assert(isParsedModule(module));
llvm::SmallVector<AbstractFunctionDecl *, 0> decls =
module->getSourceLookupCache().getCustomDerivativeDecls();
for (const AbstractFunctionDecl *afd : decls) {
for (const auto *derAttr :
afd->getAttrs().getAttributes<DerivativeAttr>()) {
// Resolve derivative function configurations from `@derivative`
// attributes by type-checking them.
(void)derAttr->getOriginalFunction(sf->getASTContext());
}
}
return {};
}
version::Version ModuleDecl::getLanguageVersionBuiltWith() const {
for (auto *F : getFiles()) {
auto *LD = dyn_cast<LoadedFile>(F);
if (!LD)
continue;
auto version = LD->getLanguageVersionBuiltWith();
if (!version.empty())
return version;
}
return version::Version();
}
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