Method istitle

crates/vm/src/builtins/str.rs:1253–1278

(&self)

    #[pymethod]
    fn istitle(&self) -> bool {
        if self.data.is_empty() {
            return false;
        }

        let mut cased = false;
        let mut previous_is_cased = false;
        for c in self.as_wtf8().code_points().map(CodePoint::to_char_lossy) {
            if c.is_uppercase() || c.is_titlecase() {
                if previous_is_cased {
                    return false;
                }
                previous_is_cased = true;
                cased = true;
            } else if c.is_lowercase() {
                if !previous_is_cased {
                    return false;
                }
                previous_is_cased = true;
                cased = true;
            } else {
                previous_is_cased = false;
            }
        }
        cased
    }

    #[pymethod]
    fn count(&self, args: FindArgs) -> usize {