| Issue |
110339
|
| Summary |
Is the regex [b-a] legal?
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
Alcaro
|
```c++
#include <regex>
int main()
{
try {
std::regex r("[\\d-e]");
puts("it's legal");
} catch (std::exception& e) {
puts(e.what());
}
try {
std::regex r("[b-a]");
puts("it's legal");
} catch (std::exception& e) {
puts(e.what());
}
}
```
https://godbolt.org/z/oMvEr5YTs
Output: `The _expression_ contained an invalid character range, such as [b-a] in most encodings.` and `it's legal`
Expected behavior: I'd expect that if I can produce an error saying that [b-a] is invalid, then an input of [b-a] returns that same error.
(Also, if you change it to `[1-0]`, it's illegal in all encodings. The C and C++ specs demand that the 0-9 are ascending and consecutive.)
![]()
_______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
