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[clang][Sema][NFC] Move
EnterExpressionEvaluationContext
to its own…
… file Sema.h is huge. This makes a small reduction to it by moving EnterExpressionEvaluationContext into a new header, since it is an independent component. Differential Revision: https://reviews.llvm.org/D149796
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clang/include/clang/Sema/EnterExpressionEvaluationContext.h
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//===--- EnterExpressionEvaluationContext.h ---------------------*- C++ -*-===// | ||
// | ||
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||
// See https://llvm.org/LICENSE.txt for license information. | ||
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
// | ||
//===----------------------------------------------------------------------===// | ||
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#ifndef LLVM_CLANG_SEMA_ENTEREXPRESSIONEVALUATIONCONTEXT_H | ||
#define LLVM_CLANG_SEMA_ENTEREXPRESSIONEVALUATIONCONTEXT_H | ||
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#include "clang/Sema/Sema.h" | ||
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namespace clang { | ||
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class Decl; | ||
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/// RAII object that enters a new expression evaluation context. | ||
class EnterExpressionEvaluationContext { | ||
Sema &Actions; | ||
bool Entered = true; | ||
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public: | ||
EnterExpressionEvaluationContext( | ||
Sema &Actions, Sema::ExpressionEvaluationContext NewContext, | ||
Decl *LambdaContextDecl = nullptr, | ||
Sema::ExpressionEvaluationContextRecord::ExpressionKind ExprContext = | ||
Sema::ExpressionEvaluationContextRecord::EK_Other, | ||
bool ShouldEnter = true) | ||
: Actions(Actions), Entered(ShouldEnter) { | ||
if (Entered) | ||
Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, | ||
ExprContext); | ||
} | ||
EnterExpressionEvaluationContext( | ||
Sema &Actions, Sema::ExpressionEvaluationContext NewContext, | ||
Sema::ReuseLambdaContextDecl_t, | ||
Sema::ExpressionEvaluationContextRecord::ExpressionKind ExprContext = | ||
Sema::ExpressionEvaluationContextRecord::EK_Other) | ||
: Actions(Actions) { | ||
Actions.PushExpressionEvaluationContext( | ||
NewContext, Sema::ReuseLambdaContextDecl, ExprContext); | ||
} | ||
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enum InitListTag { InitList }; | ||
EnterExpressionEvaluationContext(Sema &Actions, InitListTag, | ||
bool ShouldEnter = true) | ||
: Actions(Actions), Entered(false) { | ||
// In C++11 onwards, narrowing checks are performed on the contents of | ||
// braced-init-lists, even when they occur within unevaluated operands. | ||
// Therefore we still need to instantiate constexpr functions used in such | ||
// a context. | ||
if (ShouldEnter && Actions.isUnevaluatedContext() && | ||
Actions.getLangOpts().CPlusPlus11) { | ||
Actions.PushExpressionEvaluationContext( | ||
Sema::ExpressionEvaluationContext::UnevaluatedList); | ||
Entered = true; | ||
} | ||
} | ||
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~EnterExpressionEvaluationContext() { | ||
if (Entered) | ||
Actions.PopExpressionEvaluationContext(); | ||
} | ||
}; | ||
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} // namespace clang | ||
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#endif |
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