//===--- 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

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_SEMA_ENTEREXPRESSIONEVALUATIONCONTEXT_H

#define LLVM_CLANG_SEMA_ENTEREXPRESSIONEVALUATIONCONTEXT_H

#include "clang/Sema/Sema.h"

namespace clang {

class Decl;

/// RAII object that enters a new expression evaluation context.

class EnterExpressionEvaluationContext {

  Sema &Actions;

  bool Entered = true;

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);

  }

  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()219k
 &&

        
Actions.getLangOpts().CPlusPlus1111.0k
) {

      Actions.PushExpressionEvaluationContext(

          Sema::ExpressionEvaluationContext::UnevaluatedList);

      Entered = true;

    }

  }

  ~EnterExpressionEvaluationContext() {

    if (Entered)

      Actions.PopExpressionEvaluationContext();

  }

};

} // namespace clang

#endif