regex_syntax::Parser.parse and regex::Regex.build alignment?

[Guillermogsjc]

Hi,

is it supposed that regex_syntax::Parser method parse to return Err in the same cases that regex:Regex method build ?

My tries tell me that this assumption is correct, but do not know if it is and will be a criteria in this repository and it will be aligned in the future.

Regards

[BurntSushi]

Sorry, it is very difficult to understand your question.

I think what you're asking is whether Regex::new can fail due to anything except a parse error. Indeed it can! It can fail if the regex exceeds the configured RegexBuilder::size_limit.

[Guillermogsjc]

Sorry for my bad questioning, wanted to ask if:

regex_syntax::Parser.parse rising Err for a pattern, implies it will fail to build with regex::Regex for the same pattern?

[BurntSushi]

Ah. If the configuration is the same for both, then yes, that's correct. If it isn't so, please file a bug.