Function looks_like_arg_key

src/lib.rs:486–490

True for strings that look like an intentional `key=value` key (e.g. `limit`, `safeSearch`, `second_arg`) rather than a positional value that merely contains a literal `=`, like a URL query string (`https://x.com?q=rust`).

(k: &str)

/// `safeSearch`, `second_arg`) rather than a positional value that merely
/// contains a literal `=`, like a URL query string (`https://x.com?q=rust`).
fn looks_like_arg_key(k: &str) -> bool {
    let mut chars = k.chars();
    matches!(chars.next(), Some(c) if c.is_ascii_alphabetic() || c == '_')
        && chars.all(|c| c.is_ascii_alphanumeric() || c == '_')
}

/// Split a `key=value` argument, trim both sides, and parse the value into
/// JSON. Shared by the `named_args` and `raw_args` loops in [`parse_args`].