mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
f3ff561c6f
This is phase-1 of switching from llvm::Optional to std::optional in the
next rebranch. llvm::Optional was removed from upstream LLVM, so we need
to migrate off rather soon. On Darwin, std::optional, and llvm::Optional
have the same layout, so we don't need to be as concerned about ABI
beyond the name mangling. `llvm::Optional` is only returned from one
function in
```
getStandardTypeSubst(StringRef TypeName,
bool allowConcurrencyManglings);
```
It's the return value, so it should not impact the mangling of the
function, and the layout is the same as `std::optional`, so it should be
mostly okay. This function doesn't appear to have users, and the ABI was
already broken 2 years ago for concurrency and no one seemed to notice
so this should be "okay".
I'm doing the migration incrementally so that folks working on main can
cherry-pick back to the release/5.9 branch. Once 5.9 is done and locked
away, then we can go through and finish the replacement. Since `None`
and `Optional` show up in contexts where they are not `llvm::None` and
`llvm::Optional`, I'm preparing the work now by going through and
removing the namespace unwrapping and making the `llvm` namespace
explicit. This should make it fairly mechanical to go through and
replace llvm::Optional with std::optional, and llvm::None with
std::nullopt. It's also a change that can be brought onto the
release/5.9 with minimal impact. This should be an NFC change.
109 lines
3.8 KiB
C++
109 lines
3.8 KiB
C++
//===--- ExprContextAnalysis.h - Expession context analysis ---------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2019 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SWIFT_IDE_EXPRCONTEXTANALYSIS_H
|
|
#define SWIFT_IDE_EXPRCONTEXTANALYSIS_H
|
|
|
|
#include "swift/AST/Type.h"
|
|
#include "swift/AST/TypeCheckRequests.h"
|
|
#include "swift/AST/Types.h"
|
|
#include "swift/Basic/LLVM.h"
|
|
#include "swift/Basic/SourceLoc.h"
|
|
#include "swift/IDE/PossibleParamInfo.h"
|
|
|
|
namespace swift {
|
|
class DeclContext;
|
|
class Expr;
|
|
class ValueDecl;
|
|
|
|
namespace ide {
|
|
enum class SemanticContextKind : uint8_t;
|
|
|
|
/// Type check parent contexts of the given decl context, and the body of the
|
|
/// given context until \c Loc if the context is a function body.
|
|
void typeCheckContextAt(TypeCheckASTNodeAtLocContext TypeCheckCtx,
|
|
SourceLoc Loc);
|
|
|
|
/// From \p DC, find and returns the outer most expression which source range is
|
|
/// exact the same as \p TargetRange. Returns \c nullptr if not found.
|
|
Expr *findParsedExpr(const DeclContext *DC, SourceRange TargetRange);
|
|
|
|
/// Remove \c CodeCompletionExpr from \p expr . Returns \c true if it actually
|
|
/// mutated the expression.
|
|
///
|
|
/// NOTE: Currently, this only removes CodeCompletionExpr at call argument
|
|
/// position.
|
|
bool removeCodeCompletionExpr(ASTContext &Ctx, Expr *&expr);
|
|
|
|
/// Collects possible expected return types of the given decl context.
|
|
/// \p DC should be an \c AbstractFunctionDecl or an \c AbstractClosureExpr.
|
|
void collectPossibleReturnTypesFromContext(DeclContext *DC,
|
|
SmallVectorImpl<Type> &candidates);
|
|
|
|
struct FunctionTypeAndDecl {
|
|
AnyFunctionType *Type;
|
|
ValueDecl *Decl;
|
|
llvm::Optional<SemanticContextKind> SemanticContext;
|
|
|
|
FunctionTypeAndDecl(AnyFunctionType *Type, ValueDecl *Decl)
|
|
: Type(Type), Decl(Decl) {}
|
|
FunctionTypeAndDecl(AnyFunctionType *Type, ValueDecl *Decl,
|
|
SemanticContextKind SemanticContext)
|
|
: Type(Type), Decl(Decl), SemanticContext(SemanticContext) {}
|
|
};
|
|
|
|
/// Given an expression and its decl context, the analyzer tries to figure out
|
|
/// the expected type of the expression by analyzing its context.
|
|
class ExprContextInfo {
|
|
SmallVector<Type, 2> PossibleTypes;
|
|
SmallVector<PossibleParamInfo, 2> PossibleParams;
|
|
SmallVector<FunctionTypeAndDecl, 2> PossibleCallees;
|
|
Expr *AnalyzedExpr = nullptr;
|
|
bool implicitSingleExpressionReturn = false;
|
|
|
|
public:
|
|
ExprContextInfo(DeclContext *DC, Expr *TargetExpr);
|
|
|
|
// Returns a list of possible context types.
|
|
ArrayRef<Type> getPossibleTypes() const { return PossibleTypes; }
|
|
|
|
/// Whether the type context comes from a single-expression body without
|
|
/// and explicit return e.g. `foo({ <here> })` and not foo({ return <here>}).
|
|
///
|
|
/// Since the input may be incomplete, such as in code-completion, take into
|
|
/// account that the types returned by `getPossibleTypes()` are only a hint.
|
|
bool isImplicitSingleExpressionReturn() const {
|
|
return implicitSingleExpressionReturn;
|
|
}
|
|
|
|
// Returns a list of possible argument label names.
|
|
// Valid only if \c getKind() is \c CallArgument.
|
|
ArrayRef<PossibleParamInfo> getPossibleParams() const {
|
|
return PossibleParams;
|
|
}
|
|
|
|
// Returns a list of possible callee
|
|
// Valid only if \c getKind() is \c CallArgument.
|
|
ArrayRef<FunctionTypeAndDecl> getPossibleCallees() const {
|
|
return PossibleCallees;
|
|
}
|
|
|
|
Expr *getAnalyzedExpr() const {
|
|
return AnalyzedExpr;
|
|
}
|
|
};
|
|
|
|
} // namespace ide
|
|
} // namespace swift
|
|
|
|
#endif // SWIFT_IDE_EXPRCONTEXTANALYSIS_H
|