Method allow_invalid_utf8

regex/regex-syntax/src/parser.rs:95–98

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

(&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 ParserBuilder {
        self.hir.allow_invalid_utf8(yes);
        self
    }

    /// Enable verbose mode in the regular expression.
    ///