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7e788b8ab9
Now that we use DefaultArgumentExpr for both kinds of default arguments, this is no longer needed.
93 lines
3.3 KiB
C++
93 lines
3.3 KiB
C++
//===--- ASTVisitor.h - SILGen ASTVisitor specialization --------*- 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 - 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 defines swift::Lowering::ASTVisitor.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_LOWERING_ASTVISITOR_H
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#define SWIFT_LOWERING_ASTVISITOR_H
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#include "swift/AST/ASTVisitor.h"
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namespace swift {
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namespace Lowering {
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/// Lowering::ASTVisitor - This is a specialization of
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/// swift::ASTVisitor which works only on resolved nodes and
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/// which automatically ignores certain AST node kinds.
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template<typename ImplClass,
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typename ExprRetTy = void,
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typename StmtRetTy = void,
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typename DeclRetTy = void,
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typename PatternRetTy = void,
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typename... Args>
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class ASTVisitor : public swift::ASTVisitor<ImplClass,
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ExprRetTy,
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StmtRetTy,
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DeclRetTy,
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PatternRetTy,
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void,
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void,
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Args...>
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{
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public:
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#define EXPR(Id, Parent)
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#define UNCHECKED_EXPR(Id, Parent) \
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ExprRetTy visit##Id##Expr(Id##Expr *E, Args...AA) { \
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llvm_unreachable(#Id "Expr should not survive to SILGen"); \
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}
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#include "swift/AST/ExprNodes.def"
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ExprRetTy visitErrorExpr(ErrorExpr *E, Args...AA) {
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llvm_unreachable("expression kind should not survive to SILGen");
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}
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ExprRetTy visitCodeCompletionExpr(CodeCompletionExpr *E, Args...AA) {
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llvm_unreachable("expression kind should not survive to SILGen");
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}
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ExprRetTy visitDefaultArgumentExpr(DefaultArgumentExpr *E, Args...AA) {
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llvm_unreachable("DefaultArgumentExpr should not appear in this position");
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}
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ExprRetTy visitVarargExpansionExpr(VarargExpansionExpr *E, Args... AA) {
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return static_cast<ImplClass*>(this)->visit(E->getSubExpr(),
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std::forward<Args>(AA)...);
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}
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ExprRetTy visitIdentityExpr(IdentityExpr *E, Args...AA) {
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return static_cast<ImplClass*>(this)->visit(E->getSubExpr(),
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std::forward<Args>(AA)...);
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}
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ExprRetTy visitTryExpr(TryExpr *E, Args...AA) {
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return static_cast<ImplClass*>(this)->visit(E->getSubExpr(),
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std::forward<Args>(AA)...);
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}
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ExprRetTy visitLazyInitializerExpr(LazyInitializerExpr *E, Args...AA) {
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return static_cast<ImplClass*>(this)->visit(E->getSubExpr(),
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std::forward<Args>(AA)...);
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}
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};
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template <typename ImplClass,
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typename ExprRetTy = void,
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typename... Args>
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using ExprVisitor = ASTVisitor<ImplClass, ExprRetTy, void, void, void, Args...>;
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} // end namespace Lowering
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} // end namespace swift
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#endif
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