https://bugs.llvm.org/show_bug.cgi?id=52280
Bug ID: 52280
Summary: Incrementation of bool values is erroneously permitted
in not-evaluated contexts
Product: clang
Version: 12.0
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: C++2b
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
This program is valid:
```
template<class T>
concept is_incrementable = requires(T t) {
{ ++t };
};
int main() {
static_assert( is_incrementable<int> );
static_assert( !is_incrementable<bool> );
}
```
but rejected in Clang because it permits the incrementation of bool values in
not-evaluated contexts.
Related discussion: https://stackoverflow.com/q/51011835/7325599
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