1 //===--- ExceptionSpecificationType.h ---------------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// \brief Defines the ExceptionSpecificationType enumeration and various
12 /// utility functions.
13 ///
14 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CLANG_BASIC_EXCEPTIONSPECIFICATIONTYPE_H
16 #define LLVM_CLANG_BASIC_EXCEPTIONSPECIFICATIONTYPE_H
17
18 namespace clang {
19
20 /// \brief The various types of exception specifications that exist in C++11.
21 enum ExceptionSpecificationType {
22 EST_None, ///< no exception specification
23 EST_DynamicNone, ///< throw()
24 EST_Dynamic, ///< throw(T1, T2)
25 EST_MSAny, ///< Microsoft throw(...) extension
26 EST_BasicNoexcept, ///< noexcept
27 EST_ComputedNoexcept, ///< noexcept(expression)
28 EST_Unevaluated, ///< not evaluated yet, for special member function
29 EST_Uninstantiated, ///< not instantiated yet
30 EST_Unparsed ///< not parsed yet
31 };
32
isDynamicExceptionSpec(ExceptionSpecificationType ESpecType)33 inline bool isDynamicExceptionSpec(ExceptionSpecificationType ESpecType) {
34 return ESpecType >= EST_DynamicNone && ESpecType <= EST_MSAny;
35 }
36
isNoexceptExceptionSpec(ExceptionSpecificationType ESpecType)37 inline bool isNoexceptExceptionSpec(ExceptionSpecificationType ESpecType) {
38 return ESpecType == EST_BasicNoexcept || ESpecType == EST_ComputedNoexcept;
39 }
40
isUnresolvedExceptionSpec(ExceptionSpecificationType ESpecType)41 inline bool isUnresolvedExceptionSpec(ExceptionSpecificationType ESpecType) {
42 return ESpecType == EST_Unevaluated || ESpecType == EST_Uninstantiated;
43 }
44
45 /// \brief Possible results from evaluation of a noexcept expression.
46 enum CanThrowResult {
47 CT_Cannot,
48 CT_Dependent,
49 CT_Can
50 };
51
mergeCanThrow(CanThrowResult CT1,CanThrowResult CT2)52 inline CanThrowResult mergeCanThrow(CanThrowResult CT1, CanThrowResult CT2) {
53 // CanThrowResult constants are ordered so that the maximum is the correct
54 // merge result.
55 return CT1 > CT2 ? CT1 : CT2;
56 }
57
58 } // end namespace clang
59
60 #endif // LLVM_CLANG_BASIC_EXCEPTIONSPECIFICATIONTYPE_H
61