6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
//===--- CurrentSourceLocExprScope.h ----------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines types used to track the current context needed to evaluate
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// a SourceLocExpr.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_AST_CURRENTSOURCELOCEXPRSCOPE_H
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#define LLVM_CLANG_AST_CURRENTSOURCELOCEXPRSCOPE_H
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#include <cassert>
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namespace clang {
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class Expr;
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/// Represents the current source location and context used to determine the
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/// value of the source location builtins (ex. __builtin_LINE), including the
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/// context of default argument and default initializer expressions.
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class CurrentSourceLocExprScope {
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/// The CXXDefaultArgExpr or CXXDefaultInitExpr we're currently evaluating.
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const Expr *DefaultExpr = nullptr;
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public:
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/// A RAII style scope guard used for tracking the current source
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/// location and context as used by the source location builtins
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/// (ex. __builtin_LINE).
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class SourceLocExprScopeGuard;
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const Expr *getDefaultExpr() const { return DefaultExpr; }
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explicit CurrentSourceLocExprScope() = default;
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private:
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explicit CurrentSourceLocExprScope(const Expr *DefaultExpr)
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: DefaultExpr(DefaultExpr) {}
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CurrentSourceLocExprScope(CurrentSourceLocExprScope const &) = default;
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CurrentSourceLocExprScope &
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operator=(CurrentSourceLocExprScope const &) = default;
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};
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class CurrentSourceLocExprScope::SourceLocExprScopeGuard {
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public:
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SourceLocExprScopeGuard(const Expr *DefaultExpr,
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CurrentSourceLocExprScope &Current)
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: Current(Current), OldVal(Current), Enable(false) {
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assert(DefaultExpr && "the new scope should not be empty");
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if ((Enable = (Current.getDefaultExpr() == nullptr)))
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Current = CurrentSourceLocExprScope(DefaultExpr);
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}
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~SourceLocExprScopeGuard() {
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if (Enable)
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Current = OldVal;
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}
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private:
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SourceLocExprScopeGuard(SourceLocExprScopeGuard const &) = delete;
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SourceLocExprScopeGuard &operator=(SourceLocExprScopeGuard const &) = delete;
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CurrentSourceLocExprScope &Current;
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CurrentSourceLocExprScope OldVal;
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bool Enable;
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};
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} // end namespace clang
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#endif // LLVM_CLANG_AST_CURRENTSOURCELOCEXPRSCOPE_H
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