llvm/llvm-project
Vedi su GitHub[clang] Poor diagnostic with wrong template argument type
Open
#121.235 aperta il 27 dic 2024
clang:diagnosticsconfirmedenhancementgood first issue
Metriche repository
- Star
- (26.378 star)
- Metriche merge PR
- (Merge medio 1g 2h) (1000 PR mergiate in 30 g)
Descrizione
Clang diagnostic for invalid bool-to-enum template parameter conversion lacks failure detail when compared to GCC, as the following C++ snippet:
enum endianness { little = 0, big };
template <endianness e>
inline void foo() {}
void bar() {
foo<false>();
}
Fails as follows on latest clang:
<source>:7:5: error: no matching function for call to 'foo'
7 | foo<false>();
| ^~~~~~~~~~
<source>:4:13: note: candidate template ignored: invalid explicitly-specified argument for template parameter 'big_endian'
4 | inline void foo() {}
GCC explicitly indicates the conversion failure instead:
<source>:4:13: note: template argument deduction/substitution failed:
<source>:7:15: error: could not convert 'false' from 'bool' to 'endianness'
7 | foo<false>();
| ~~~~~~~~~~^~
| |
| bool
Godbolt: https://godbolt.org/z/hnazTn3M7 (cc/ @shafik).