Method new_substr

crates/vm/src/builtins/str.rs:455–467

(&self, s: Wtf8Buf)

    }

    fn new_substr(&self, s: Wtf8Buf) -> Self {
        let kind = if self.kind().is_ascii() || s.is_ascii() {
            StrKind::Ascii
        } else if self.kind().is_utf8() || s.is_utf8() {
            StrKind::Utf8
        } else {
            StrKind::Wtf8
        };
        unsafe {
            // SAFETY: kind is properly decided for substring
            Self::new_str_unchecked(s.into(), kind)
        }
    }

    #[inline]
    pub const fn as_wtf8(&self) -> &Wtf8 {