Method allow_invalid_utf8

regex/regex-syntax/src/hir/translate.rs:66–72

When enabled, translation will permit the construction of a regular expression that may match invalid UTF-8. When disabled (the default), the translator is guaranteed to produce an expression that will only ever match valid UTF-8 (otherwise, the translator will return an error). Perhaps surprisingly, when invalid UTF-8 isn't allowed, a negated ASCII word boundary (uttered as `(?-u:\B)` in the co

(
        &mut self,
        yes: bool,
    )

    /// the parser to return an error. Namely, a negated ASCII word boundary
    /// can result in matching positions that aren't valid UTF-8 boundaries.
    pub fn allow_invalid_utf8(
        &mut self,
        yes: bool,
    ) -> &mut TranslatorBuilder {
        self.allow_invalid_utf8 = yes;
        self
    }

    /// Enable or disable the case insensitive flag (`i`) by default.
    pub fn case_insensitive(&mut self, yes: bool) -> &mut TranslatorBuilder {