forked from OSchip/llvm-project
e5825190b8
Before this patch type traits are checked in Parser, so use type traits
directly did not cause assertion faults. However if type traits are initialized
from a template, we didn't perform arity checks before evaluating. This
patch moves arity checks from Parser to Sema, and performing arity
checks in Sema actions, so type traits get checked corretly.
Crash input:
```
template<class... Ts> bool b = __is_constructible(Ts...);
bool x = b<>;
```
After this patch:
```
clang/test/SemaCXX/type-trait-eval-crash-issue-57008.cpp:5:32: error: type trait requires 1 or more arguments; have 0 arguments
template<class... Ts> bool b = __is_constructible(Ts...);
^~~~~~~~~~~~~~~~~~
clang/test/SemaCXX/type-trait-eval-crash-issue-57008.cpp:6:10: note: in instantiation of variable template specialization 'b<>' requested here
bool x = b<>;
^
1 error generated.
```
See https://godbolt.org/z/q39W78hsK.
Fixes https://github.com/llvm/llvm-project/issues/57008
Reviewed By: aaron.ballman
Differential Revision: https://reviews.llvm.org/D131423
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|---|---|---|
| .. | ||
| Targets | ||
| Attributes.cpp | ||
| BuiltinTargetFeatures.h | ||
| Builtins.cpp | ||
| CLWarnings.cpp | ||
| CMakeLists.txt | ||
| CharInfo.cpp | ||
| CodeGenOptions.cpp | ||
| Cuda.cpp | ||
| DarwinSDKInfo.cpp | ||
| Diagnostic.cpp | ||
| DiagnosticIDs.cpp | ||
| DiagnosticOptions.cpp | ||
| ExpressionTraits.cpp | ||
| FileEntry.cpp | ||
| FileManager.cpp | ||
| FileSystemStatCache.cpp | ||
| IdentifierTable.cpp | ||
| LangOptions.cpp | ||
| LangStandards.cpp | ||
| MakeSupport.cpp | ||
| Module.cpp | ||
| NoSanitizeList.cpp | ||
| ObjCRuntime.cpp | ||
| OpenCLOptions.cpp | ||
| OpenMPKinds.cpp | ||
| OperatorPrecedence.cpp | ||
| ProfileList.cpp | ||
| SanitizerSpecialCaseList.cpp | ||
| Sanitizers.cpp | ||
| Sarif.cpp | ||
| SourceLocation.cpp | ||
| SourceManager.cpp | ||
| Stack.cpp | ||
| TargetID.cpp | ||
| TargetInfo.cpp | ||
| Targets.cpp | ||
| Targets.h | ||
| TokenKinds.cpp | ||
| TypeTraits.cpp | ||
| Version.cpp | ||
| Warnings.cpp | ||
| XRayInstr.cpp | ||
| XRayLists.cpp | ||