Function canonical_token_at

crates/openshell-core/src/secrets.rs:445–455

(text: &str, abs_start: usize)

}

fn canonical_token_at(text: &str, abs_start: usize) -> Option<(usize, &str)> {
    if !text[abs_start..].starts_with(PLACEHOLDER_PREFIX) {
        return None;
    }
    let key_start = abs_start + PLACEHOLDER_PREFIX.len();
    let key_end = text[key_start..]
        .bytes()
        .position(|b| !is_env_key_char(b))
        .map_or(text.len(), |p| key_start + p);
    (key_end > key_start).then_some((key_end, &text[abs_start..key_end]))
}

fn alias_token_at(text: &str, abs_start: usize) -> Option<(usize, &str)> {
    let suffix = &text[abs_start..];