llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang
Author: Younan Zhang (zyn0217)
<details>
<summary>Changes</summary>
Instead of merely suggesting the template arguments are invalid, we now provide
an explanation of why the explicit template argument is invalid, following the
last diagnostic note.
For example,
```cpp
template<int*>
void f();
void g() {
f<42>();
}
```
We now have diagnostics
1. no matching function for call to 'f'
2. candidate template ignored: invalid explicitly-specified argument for 1st
template parameter
But don't explain why the 1st is invalid. With this patch, we will have an
additional note
3. value of type 'int' is not implicitly convertible to 'int *'
---
Full diff: https://github.com/llvm/llvm-project/pull/139066.diff
18 Files Affected:
- (modified) clang/lib/Sema/SemaOverload.cpp (+16-1)
- (modified) clang/test/AST/ByteCode/builtin-align-cxx.cpp (+2-1)
- (modified) clang/test/AST/ByteCode/cxx20.cpp (+2-1)
- (modified) clang/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p12.cpp
(+8-4)
- (modified) clang/test/CXX/drs/cwg2xx.cpp (+4)
- (modified) clang/test/CXX/drs/cwg3xx.cpp (+2)
- (modified) clang/test/CXX/expr/expr.const/p3-0x.cpp (+2-1)
- (modified) clang/test/CXX/temp/temp.param/p8-cxx20.cpp (+2-1)
- (modified) clang/test/CXX/temp/temp.res/temp.local/p1.cpp (+4-2)
- (modified) clang/test/Modules/cxx-templates.cpp (+2)
- (modified) clang/test/SemaCXX/builtin-align-cxx.cpp (+2-1)
- (modified) clang/test/SemaCXX/calling-conv-compat.cpp (+2-1)
- (modified) clang/test/SemaCXX/constexpr-function-recovery-crash.cpp (+2-1)
- (modified) clang/test/SemaCXX/cxx2a-template-lambdas.cpp (+4-2)
- (modified) clang/test/SemaCXX/typo-correction.cpp (+2-1)
- (modified) clang/test/SemaTemplate/concepts-using-decl.cpp (+4-2)
- (modified) clang/test/SemaTemplate/overload-candidates.cpp (+6-4)
- (modified) clang/test/SemaTemplate/temp_arg_nontype_cxx11.cpp (+3-2)
``````````diff
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</details>
https://github.com/llvm/llvm-project/pull/139066
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