mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
58e0efc345
given decl, and plumb the information down to it. NFC since the argument is currently dead. Swift SVN r24132
122 lines
4.0 KiB
C++
122 lines
4.0 KiB
C++
//===--- AnyFunctionRef.h - A Universal Function Reference ------*- C++ -*-===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See http://swift.org/LICENSE.txt for license information
|
|
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SWIFT_AST_ANY_FUNCTION_REF_H
|
|
#define SWIFT_AST_ANY_FUNCTION_REF_H
|
|
|
|
#include "swift/Basic/LLVM.h"
|
|
#include "swift/AST/Decl.h"
|
|
#include "swift/AST/Expr.h"
|
|
#include "swift/AST/Types.h"
|
|
#include "llvm/ADT/PointerUnion.h"
|
|
|
|
namespace swift {
|
|
class CaptureInfo;
|
|
|
|
/// \brief A universal function reference -- can wrap all AST nodes that
|
|
/// represent functions and exposes a common interface to them.
|
|
class AnyFunctionRef {
|
|
PointerUnion<AbstractFunctionDecl *, AbstractClosureExpr *> TheFunction;
|
|
|
|
public:
|
|
AnyFunctionRef(AbstractFunctionDecl *AFD) : TheFunction(AFD) {
|
|
assert(AFD && "should have a function");
|
|
}
|
|
AnyFunctionRef(AbstractClosureExpr *ACE) : TheFunction(ACE) {
|
|
assert(ACE && "should have a closure");
|
|
}
|
|
|
|
CaptureInfo &getCaptureInfo() const {
|
|
if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
|
|
return AFD->getCaptureInfo();
|
|
return TheFunction.get<AbstractClosureExpr *>()->getCaptureInfo();
|
|
}
|
|
|
|
void getLocalCaptures(SmallVectorImpl<CaptureInfo::
|
|
LocalCaptureTy> &Result) const {
|
|
auto FD = dyn_cast_or_null<FuncDecl>(
|
|
TheFunction.dyn_cast<AbstractFunctionDecl *>());
|
|
getCaptureInfo().getLocalCaptures(FD, Result);
|
|
}
|
|
|
|
ArrayRef<Pattern *> getBodyParamPatterns() const {
|
|
if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
|
|
return AFD->getBodyParamPatterns();
|
|
return TheFunction.get<AbstractClosureExpr *>()->getParamPatterns();
|
|
}
|
|
|
|
Type getType() const {
|
|
if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
|
|
return AFD->getType();
|
|
return TheFunction.get<AbstractClosureExpr *>()->getType();
|
|
}
|
|
|
|
/// FIXME: This should just be getType() when interface types take over in
|
|
/// the AST.
|
|
Type getInterfaceType() const {
|
|
if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
|
|
return AFD->getInterfaceType();
|
|
return TheFunction.get<AbstractClosureExpr *>()->getType();
|
|
}
|
|
|
|
Type getBodyResultType() const {
|
|
if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>()) {
|
|
if (auto *FD = dyn_cast<FuncDecl>(AFD))
|
|
return FD->getBodyResultType();
|
|
return TupleType::getEmpty(AFD->getASTContext());
|
|
}
|
|
return TheFunction.get<AbstractClosureExpr *>()->getResultType();
|
|
}
|
|
|
|
BraceStmt *getBody() const {
|
|
if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
|
|
return AFD->getBody();
|
|
auto *ACE = TheFunction.get<AbstractClosureExpr *>();
|
|
if (auto *CE = dyn_cast<ClosureExpr>(ACE))
|
|
return CE->getBody();
|
|
return cast<AutoClosureExpr>(ACE)->getBody();
|
|
}
|
|
|
|
DeclContext *getAsDeclContext() const {
|
|
if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
|
|
return AFD;
|
|
return TheFunction.get<AbstractClosureExpr *>();
|
|
}
|
|
|
|
AbstractFunctionDecl *getAbstractFunctionDecl() const {
|
|
return TheFunction.dyn_cast<AbstractFunctionDecl*>();
|
|
}
|
|
|
|
AbstractClosureExpr *getAbstractClosureExpr() const {
|
|
return TheFunction.dyn_cast<AbstractClosureExpr*>();
|
|
}
|
|
|
|
/// Return true if this closure is passed as an argument to a function and is
|
|
/// known not to escape from that function. In this case, captures can be
|
|
/// more efficient.
|
|
bool isKnownNoEscape() const {
|
|
if (TheFunction.is<AbstractFunctionDecl *>())
|
|
return false;
|
|
|
|
auto *CE = TheFunction.get<AbstractClosureExpr *>();
|
|
if (!CE->getType() || CE->getType()->is<ErrorType>())
|
|
return false;
|
|
return CE->getType()->castTo<FunctionType>()->isNoEscape();
|
|
}
|
|
|
|
};
|
|
|
|
} // namespace swift
|
|
|
|
#endif // LLVM_SWIFT_AST_ANY_FUNCTION_REF_H
|
|
|