Function CSTL_u8string_replace_at

pub unsafe extern "C" fn CSTL_u8string_replace_at(
    instance: CSTL_UTF8StringRef,
    off: usize,
    count: usize,
    ptr: *const char8_t,
    alloc: *mut CSTL_Alloc,
) -> bool

Replaces the substring at offset off in instance with the length given by count with the null-terminated string at ptr.

If off is outside of the range [instance, instance + CSTL_u8string_size(instance)] or if the length of the resulting string is greater than CSTL_u8string_max_size() this function has no effect and returns false, otherwise it returns true.