| Issue |
176767
|
| Summary |
Clang rejects cv-qualified anonymous bit-fields (valid C++17)
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
vrukesh
|
What code / commands /steps will reproduce the problem?
Compile the sample code:
`
typedef int t;
typedef int q;
struct S {
const ::t : 1;
volatile q : 1;
};
int main(void) {}
`
**Compiler Explorer link:** https://godbolt.org/z/zhPWaq6qo
**What is the expected result?**
Compilation should pass
**What happens instead?**
g++ (GCC) compilation passes.
Clang rejects the unnamed bit-fields that carry cv-qualifiers.
C++17 [class.bit] says a bit-field is declared with a `decl-specifier-seq` (integral or enum type) and may omit the identifier; it forbids only reference types. No rule bans cv-qualifiers on an unnamed bit-field, so `const int : N;` and `volatile int : N;` are well-formed. The qualifiers are simply irrelevant because the field has no name, but the declaration is valid.
Clang’s rejection is nonconforming; the declarations should be accepted per the standard.
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