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//===--- ExceptionSpecificationType.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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Defines the ExceptionSpecificationType enumeration and various
/// utility functions.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_BASIC_EXCEPTIONSPECIFICATIONTYPE_H
#define LLVM_CLANG_BASIC_EXCEPTIONSPECIFICATIONTYPE_H
namespace clang {
/// The various types of exception specifications that exist in C++11.
enum ExceptionSpecificationType {
EST_None, ///< no exception specification
EST_DynamicNone, ///< throw()
EST_Dynamic, ///< throw(T1, T2)
EST_MSAny, ///< Microsoft throw(...) extension
EST_NoThrow, ///< Microsoft __declspec(nothrow) extension
EST_BasicNoexcept, ///< noexcept
EST_DependentNoexcept,///< noexcept(expression), value-dependent
EST_NoexceptFalse, ///< noexcept(expression), evals to 'false'
EST_NoexceptTrue, ///< noexcept(expression), evals to 'true'
EST_Unevaluated, ///< not evaluated yet, for special member function
EST_Uninstantiated, ///< not instantiated yet
EST_Unparsed ///< not parsed yet
};
inline bool isDynamicExceptionSpec(ExceptionSpecificationType ESpecType) {
return ESpecType >= EST_DynamicNone && ESpecType <= EST_MSAny;
}
inline bool isComputedNoexcept(ExceptionSpecificationType ESpecType) {
return ESpecType >= EST_DependentNoexcept &&
ESpecType <= EST_NoexceptTrue;
}
inline bool isNoexceptExceptionSpec(ExceptionSpecificationType ESpecType) {
return ESpecType == EST_BasicNoexcept || ESpecType == EST_NoThrow ||
isComputedNoexcept(ESpecType);
}
inline bool isUnresolvedExceptionSpec(ExceptionSpecificationType ESpecType) {
return ESpecType == EST_Unevaluated || ESpecType == EST_Uninstantiated;
}
/// Possible results from evaluation of a noexcept expression.
enum CanThrowResult {
CT_Cannot,
CT_Dependent,
CT_Can
};
inline CanThrowResult mergeCanThrow(CanThrowResult CT1, CanThrowResult CT2) {
// CanThrowResult constants are ordered so that the maximum is the correct
// merge result.
return CT1 > CT2 ? CT1 : CT2;
}
} // end namespace clang
#endif // LLVM_CLANG_BASIC_EXCEPTIONSPECIFICATIONTYPE_H
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