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 /// 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 /// 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_DependentNoexcept,///< noexcept(expression), value-dependent
28 EST_NoexceptFalse, ///< noexcept(expression), evals to 'false'
29 EST_NoexceptTrue, ///< noexcept(expression), evals to 'true'
30 EST_Unevaluated, ///< not evaluated yet, for special member function
31 EST_Uninstantiated, ///< not instantiated yet
32 EST_Unparsed ///< not parsed yet
33 };
34
isDynamicExceptionSpec(ExceptionSpecificationType ESpecType)35 inline bool isDynamicExceptionSpec(ExceptionSpecificationType ESpecType) {
36 return ESpecType >= EST_DynamicNone && ESpecType <= EST_MSAny;
37 }
38
isComputedNoexcept(ExceptionSpecificationType ESpecType)39 inline bool isComputedNoexcept(ExceptionSpecificationType ESpecType) {
40 return ESpecType >= EST_DependentNoexcept &&
41 ESpecType <= EST_NoexceptTrue;
42 }
43
isNoexceptExceptionSpec(ExceptionSpecificationType ESpecType)44 inline bool isNoexceptExceptionSpec(ExceptionSpecificationType ESpecType) {
45 return ESpecType == EST_BasicNoexcept || isComputedNoexcept(ESpecType);
46 }
47
isUnresolvedExceptionSpec(ExceptionSpecificationType ESpecType)48 inline bool isUnresolvedExceptionSpec(ExceptionSpecificationType ESpecType) {
49 return ESpecType == EST_Unevaluated || ESpecType == EST_Uninstantiated;
50 }
51
52 /// Possible results from evaluation of a noexcept expression.
53 enum CanThrowResult {
54 CT_Cannot,
55 CT_Dependent,
56 CT_Can
57 };
58
mergeCanThrow(CanThrowResult CT1,CanThrowResult CT2)59 inline CanThrowResult mergeCanThrow(CanThrowResult CT1, CanThrowResult CT2) {
60 // CanThrowResult constants are ordered so that the maximum is the correct
61 // merge result.
62 return CT1 > CT2 ? CT1 : CT2;
63 }
64
65 } // end namespace clang
66
67 #endif // LLVM_CLANG_BASIC_EXCEPTIONSPECIFICATIONTYPE_H
68