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278 lines
8.3 KiB
C++
278 lines
8.3 KiB
C++
//===--- ASTScopeImpl.cpp - Swift Object-Oriented AST Scope ---------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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///
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/// This file implements the common functions of the 49 ontology.
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///
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//===----------------------------------------------------------------------===//
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#include "swift/AST/ASTScope.h"
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#include "swift/AST/ASTContext.h"
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#include "swift/AST/ASTWalker.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/Expr.h"
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#include "swift/AST/Initializer.h"
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#include "swift/AST/LazyResolver.h"
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#include "swift/AST/Module.h"
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#include "swift/AST/NameLookup.h"
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#include "swift/AST/ParameterList.h"
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#include "swift/AST/Pattern.h"
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#include "swift/AST/SourceFile.h"
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#include "swift/AST/Stmt.h"
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#include "swift/AST/TypeRepr.h"
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#include "swift/Basic/NullablePtr.h"
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#include "swift/Basic/STLExtras.h"
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#include "llvm/Support/Compiler.h"
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#include <algorithm>
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using namespace swift;
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using namespace ast_scope;
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#pragma mark ASTScope
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void ASTScope::unqualifiedLookup(
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SourceFile *SF, DeclNameRef name, SourceLoc loc,
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namelookup::AbstractASTScopeDeclConsumer &consumer) {
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if (auto *s = SF->getASTContext().Stats)
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++s->getFrontendCounters().NumASTScopeLookups;
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ASTScopeImpl::unqualifiedLookup(SF, name, loc, consumer);
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}
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llvm::SmallVector<LabeledStmt *, 4> ASTScope::lookupLabeledStmts(
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SourceFile *sourceFile, SourceLoc loc) {
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return ASTScopeImpl::lookupLabeledStmts(sourceFile, loc);
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}
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std::pair<CaseStmt *, CaseStmt *> ASTScope::lookupFallthroughSourceAndDest(
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SourceFile *sourceFile, SourceLoc loc) {
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return ASTScopeImpl::lookupFallthroughSourceAndDest(sourceFile, loc);
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}
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#if SWIFT_COMPILER_IS_MSVC
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#pragma warning(push)
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#pragma warning(disable : 4996)
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#endif
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void ASTScope::dump() const { impl->dump(); }
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#if SWIFT_COMPILER_IS_MSVC
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#pragma warning(pop)
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#endif
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void ASTScope::print(llvm::raw_ostream &out) const { impl->print(out); }
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void ASTScope::dumpOneScopeMapLocation(std::pair<unsigned, unsigned> lineCol) {
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impl->dumpOneScopeMapLocation(lineCol);
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}
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#pragma mark ASTScopeImpl
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const PatternBindingEntry &AbstractPatternEntryScope::getPatternEntry() const {
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return decl->getPatternList()[patternEntryIndex];
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}
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Pattern *AbstractPatternEntryScope::getPattern() const {
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return getPatternEntry().getPattern();
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}
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NullablePtr<ClosureExpr> BraceStmtScope::parentClosureIfAny() const {
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return !getParent() ? nullptr : getParent().get()->getClosureIfClosureScope();
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}
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NullablePtr<ClosureExpr> ASTScopeImpl::getClosureIfClosureScope() const {
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return nullptr;
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}
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SourceManager &ASTScopeImpl::getSourceManager() const {
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return getASTContext().SourceMgr;
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}
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Stmt *LabeledConditionalStmtScope::getStmt() const {
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return getLabeledConditionalStmt();
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}
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#pragma mark getLabeledConditionalStmt
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LabeledConditionalStmt *IfStmtScope::getLabeledConditionalStmt() const {
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return stmt;
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}
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LabeledConditionalStmt *WhileStmtScope::getLabeledConditionalStmt() const {
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return stmt;
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}
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LabeledConditionalStmt *GuardStmtScope::getLabeledConditionalStmt() const {
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return stmt;
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}
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#pragma mark getASTContext
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ASTContext &ASTScopeImpl::getASTContext() const {
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if (auto d = getDeclIfAny())
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return d.get()->getASTContext();
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if (auto dc = getDeclContext())
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return dc.get()->getASTContext();
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return getParent().get()->getASTContext();
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}
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#pragma mark getDeclContext
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NullablePtr<DeclContext> ASTScopeImpl::getDeclContext() const {
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return nullptr;
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}
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NullablePtr<DeclContext> ASTSourceFileScope::getDeclContext() const {
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return NullablePtr<DeclContext>(SF);
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}
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NullablePtr<DeclContext> GenericTypeOrExtensionScope::getDeclContext() const {
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return getGenericContext();
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}
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NullablePtr<DeclContext> GenericParamScope::getDeclContext() const {
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return dyn_cast<DeclContext>(holder);
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}
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NullablePtr<DeclContext> PatternEntryInitializerScope::getDeclContext() const {
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return getPatternEntry().getInitContext();
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}
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NullablePtr<DeclContext> BraceStmtScope::getDeclContext() const {
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return getParent().get()->getDeclContext();
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}
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NullablePtr<DeclContext>
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DefaultArgumentInitializerScope::getDeclContext() const {
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auto *dc = decl->getDefaultArgumentInitContext();
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ASTScopeAssert(dc, "If scope exists, this must exist");
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return dc;
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}
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// When asked for a loc in an intializer in a capture list, the asked-for
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// context is the closure.
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NullablePtr<DeclContext> CaptureListScope::getDeclContext() const {
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return expr->getClosureBody();
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}
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NullablePtr<DeclContext> AttachedPropertyWrapperScope::getDeclContext() const {
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return decl->getParentPatternBinding()->getInitContext(0);
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}
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NullablePtr<DeclContext> AbstractFunctionDeclScope::getDeclContext() const {
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return decl;
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}
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NullablePtr<DeclContext> ParameterListScope::getDeclContext() const {
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return matchingContext;
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}
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#pragma mark getClassName
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std::string GenericTypeOrExtensionScope::getClassName() const {
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return declKindName() + portionName() + "Scope";
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}
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#define DEFINE_GET_CLASS_NAME(Name) \
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std::string Name::getClassName() const { return #Name; }
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DEFINE_GET_CLASS_NAME(ASTSourceFileScope)
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DEFINE_GET_CLASS_NAME(GenericParamScope)
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DEFINE_GET_CLASS_NAME(AbstractFunctionDeclScope)
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DEFINE_GET_CLASS_NAME(ParameterListScope)
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DEFINE_GET_CLASS_NAME(FunctionBodyScope)
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DEFINE_GET_CLASS_NAME(DefaultArgumentInitializerScope)
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DEFINE_GET_CLASS_NAME(AttachedPropertyWrapperScope)
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DEFINE_GET_CLASS_NAME(PatternEntryDeclScope)
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DEFINE_GET_CLASS_NAME(PatternEntryInitializerScope)
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DEFINE_GET_CLASS_NAME(ConditionalClauseScope)
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DEFINE_GET_CLASS_NAME(ConditionalClausePatternUseScope)
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DEFINE_GET_CLASS_NAME(CaptureListScope)
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DEFINE_GET_CLASS_NAME(ClosureParametersScope)
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DEFINE_GET_CLASS_NAME(TopLevelCodeScope)
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DEFINE_GET_CLASS_NAME(SpecializeAttributeScope)
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DEFINE_GET_CLASS_NAME(DifferentiableAttributeScope)
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DEFINE_GET_CLASS_NAME(SubscriptDeclScope)
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DEFINE_GET_CLASS_NAME(EnumElementScope)
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DEFINE_GET_CLASS_NAME(IfStmtScope)
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DEFINE_GET_CLASS_NAME(WhileStmtScope)
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DEFINE_GET_CLASS_NAME(GuardStmtScope)
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DEFINE_GET_CLASS_NAME(LookupParentDiversionScope)
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DEFINE_GET_CLASS_NAME(RepeatWhileScope)
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DEFINE_GET_CLASS_NAME(DoStmtScope)
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DEFINE_GET_CLASS_NAME(DoCatchStmtScope)
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DEFINE_GET_CLASS_NAME(SwitchStmtScope)
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DEFINE_GET_CLASS_NAME(ForEachStmtScope)
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DEFINE_GET_CLASS_NAME(ForEachPatternScope)
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DEFINE_GET_CLASS_NAME(CaseStmtScope)
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DEFINE_GET_CLASS_NAME(CaseLabelItemScope)
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DEFINE_GET_CLASS_NAME(CaseStmtBodyScope)
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DEFINE_GET_CLASS_NAME(BraceStmtScope)
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#undef DEFINE_GET_CLASS_NAME
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#pragma mark getSourceFile
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const SourceFile *ASTScopeImpl::getSourceFile() const {
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return getParent().get()->getSourceFile();
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}
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const SourceFile *ASTSourceFileScope::getSourceFile() const { return SF; }
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SourceRange ExtensionScope::getBraces() const { return decl->getBraces(); }
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SourceRange NominalTypeScope::getBraces() const { return decl->getBraces(); }
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NullablePtr<NominalTypeDecl>
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ExtensionScope::getCorrespondingNominalTypeDecl() const {
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return decl->getExtendedNominal();
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}
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void ASTScopeImpl::preOrderDo(function_ref<void(ASTScopeImpl *)> fn) {
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fn(this);
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preOrderChildrenDo(fn);
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}
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void ASTScopeImpl::preOrderChildrenDo(function_ref<void(ASTScopeImpl *)> fn) {
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for (auto *child : getChildren())
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child->preOrderDo(fn);
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}
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void ASTScopeImpl::postOrderDo(function_ref<void(ASTScopeImpl *)> fn) {
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for (auto *child : getChildren())
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child->postOrderDo(fn);
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fn(this);
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}
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ArrayRef<StmtConditionElement> ConditionalClauseScope::getCond() const {
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return stmt->getCond();
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}
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const StmtConditionElement &
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ConditionalClauseScope::getStmtConditionElement() const {
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return getCond()[index];
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}
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unsigned ASTScopeImpl::countDescendants() const {
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unsigned count = 0;
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const_cast<ASTScopeImpl *>(this)->preOrderDo(
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[&](ASTScopeImpl *) { ++count; });
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return count - 1;
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}
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// Can fail if a subscope is lazy and not reexpanded
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void ASTScopeImpl::assertThatTreeDoesNotShrink(function_ref<void()> fn) {
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#ifndef NDEBUG
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unsigned beforeCount = countDescendants();
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#endif
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fn();
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#ifndef NDEBUG
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unsigned afterCount = countDescendants();
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ASTScopeAssert(beforeCount <= afterCount, "shrank?!");
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#endif
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}
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