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84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
//===--- AnyFunctionRef.h - A Universal Function Reference ------*- C++ -*-===//
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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 - 2015 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 http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_AST_ANY_FUNCTION_REF_H
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#define SWIFT_AST_ANY_FUNCTION_REF_H
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#include "swift/Basic/LLVM.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/Expr.h"
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#include "llvm/ADT/PointerUnion.h"
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namespace swift {
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class CaptureInfo;
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/// \brief A universal function reference -- can wrap all AST nodes that
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/// represent functions and exposes a common interface to them.
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class AnyFunctionRef {
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PointerUnion<AbstractFunctionDecl *, AbstractClosureExpr *> TheFunction;
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public:
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AnyFunctionRef(AbstractFunctionDecl *AFD) : TheFunction(AFD) {
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assert(AFD && "should have a function");
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}
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AnyFunctionRef(AbstractClosureExpr *ACE) : TheFunction(ACE) {
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assert(ACE && "should have a closure");
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}
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CaptureInfo &getCaptureInfo() {
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if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
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return AFD->getCaptureInfo();
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return TheFunction.get<AbstractClosureExpr *>()->getCaptureInfo();
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}
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ArrayRef<Pattern *> getArgParamPatterns() {
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if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
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return AFD->getArgParamPatterns();
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return TheFunction.get<AbstractClosureExpr *>()->getParamPatterns();
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}
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Type getType() {
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if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
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return AFD->getType();
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return TheFunction.get<AbstractClosureExpr *>()->getType();
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}
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Type getBodyResultType() {
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if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>()) {
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if (auto *FD = dyn_cast<FuncDecl>(AFD))
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return FD->getBodyResultType();
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return TupleType::getEmpty(AFD->getASTContext());
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}
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return TheFunction.get<AbstractClosureExpr *>()->getResultType();
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}
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BraceStmt *getBody() {
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if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
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return AFD->getBody();
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auto *ACE = TheFunction.get<AbstractClosureExpr *>();
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if (auto *CE = dyn_cast<ClosureExpr>(ACE))
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return CE->getBody();
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return cast<AutoClosureExpr>(ACE)->getBody();
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}
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DeclContext *getAsDeclContext() {
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if (auto *AFD = TheFunction.dyn_cast<AbstractFunctionDecl *>())
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return AFD;
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return TheFunction.get<AbstractClosureExpr *>();
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}
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};
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} // namespace swift
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#endif // LLVM_SWIFT_AST_ANY_FUNCTION_REF_H
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