mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
e212d4567f
Instead of building ArgumentShuffleExprs, lets just build a TupleExpr, with explicit representation of collected varargs and default arguments. This isn't quite as elegant as it should be, because when re-typechecking, SanitizeExpr needs to restore the 'old' parameter list by stripping out the nodes inserted by type checking. However that hackery is all isolated in one place and will go away soon. Note that there's a minor change the generated SIL. Caller default arguments (#file, #line, etc) are no longer delayed and are instead evaluated in their usual argument position. I don't believe this actually results in an observable change in behavior, but if it turns out to be a problem, we can pretty easily change it back to the old behavior with a bit of extra work.
98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
//===--- ASTVisitor.h - SILGen ASTVisitor specialization --------*- C++ -*-===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines swift::Lowering::ASTVisitor.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SWIFT_LOWERING_ASTVISITOR_H
|
|
#define SWIFT_LOWERING_ASTVISITOR_H
|
|
|
|
#include "swift/AST/ASTVisitor.h"
|
|
|
|
namespace swift {
|
|
namespace Lowering {
|
|
|
|
/// Lowering::ASTVisitor - This is a specialization of
|
|
/// swift::ASTVisitor which works only on resolved nodes and
|
|
/// which automatically ignores certain AST node kinds.
|
|
template<typename ImplClass,
|
|
typename ExprRetTy = void,
|
|
typename StmtRetTy = void,
|
|
typename DeclRetTy = void,
|
|
typename PatternRetTy = void,
|
|
typename... Args>
|
|
class ASTVisitor : public swift::ASTVisitor<ImplClass,
|
|
ExprRetTy,
|
|
StmtRetTy,
|
|
DeclRetTy,
|
|
PatternRetTy,
|
|
void,
|
|
void,
|
|
Args...>
|
|
{
|
|
public:
|
|
#define EXPR(Id, Parent)
|
|
#define UNCHECKED_EXPR(Id, Parent) \
|
|
ExprRetTy visit##Id##Expr(Id##Expr *E, Args...AA) { \
|
|
llvm_unreachable(#Id "Expr should not survive to SILGen"); \
|
|
}
|
|
#include "swift/AST/ExprNodes.def"
|
|
|
|
ExprRetTy visitErrorExpr(ErrorExpr *E, Args...AA) {
|
|
llvm_unreachable("expression kind should not survive to SILGen");
|
|
}
|
|
|
|
ExprRetTy visitCodeCompletionExpr(CodeCompletionExpr *E, Args...AA) {
|
|
llvm_unreachable("expression kind should not survive to SILGen");
|
|
}
|
|
|
|
ExprRetTy visitDefaultArgumentExpr(DefaultArgumentExpr *E, Args...AA) {
|
|
llvm_unreachable("DefaultArgumentExpr should not appear in this position");
|
|
}
|
|
|
|
ExprRetTy visitCallerDefaultArgumentExpr(CallerDefaultArgumentExpr *E, Args... AA) {
|
|
return static_cast<ImplClass*>(this)->visit(E->getSubExpr(),
|
|
std::forward<Args>(AA)...);
|
|
}
|
|
|
|
ExprRetTy visitVarargExpansionExpr(VarargExpansionExpr *E, Args... AA) {
|
|
return static_cast<ImplClass*>(this)->visit(E->getSubExpr(),
|
|
std::forward<Args>(AA)...);
|
|
}
|
|
|
|
ExprRetTy visitIdentityExpr(IdentityExpr *E, Args...AA) {
|
|
return static_cast<ImplClass*>(this)->visit(E->getSubExpr(),
|
|
std::forward<Args>(AA)...);
|
|
}
|
|
|
|
ExprRetTy visitTryExpr(TryExpr *E, Args...AA) {
|
|
return static_cast<ImplClass*>(this)->visit(E->getSubExpr(),
|
|
std::forward<Args>(AA)...);
|
|
}
|
|
|
|
ExprRetTy visitLazyInitializerExpr(LazyInitializerExpr *E, Args...AA) {
|
|
return static_cast<ImplClass*>(this)->visit(E->getSubExpr(),
|
|
std::forward<Args>(AA)...);
|
|
}
|
|
};
|
|
|
|
template <typename ImplClass,
|
|
typename ExprRetTy = void,
|
|
typename... Args>
|
|
using ExprVisitor = ASTVisitor<ImplClass, ExprRetTy, void, void, void, Args...>;
|
|
|
|
} // end namespace Lowering
|
|
} // end namespace swift
|
|
|
|
#endif
|