Function is_class_like_keyword

src/completion/phpdoc/generation.rs:694–722

Check whether a declaration string starts with a class-like keyword (class, interface, trait, enum), possibly preceded by modifiers.

(decl: &str)

/// Check whether a declaration string starts with a class-like keyword
/// (class, interface, trait, enum), possibly preceded by modifiers.
fn is_class_like_keyword(decl: &str) -> bool {
    let class_keywords = ["class", "interface", "trait", "enum"];
    let modifier_keywords = ["abstract", "final", "readonly"];
    let lower = decl.to_lowercase();
    let mut rest = lower.as_str().trim();
    loop {
        let mut found = false;
        for kw in &class_keywords {
            if let Some(after) = rest.strip_prefix(*kw)
                && (after.is_empty() || after.starts_with(|c: char| c.is_whitespace()))
            {
                return true;
            }
        }
        for kw in &modifier_keywords {
            if let Some(after) = rest.strip_prefix(*kw)
                && (after.is_empty() || after.starts_with(|c: char| c.is_whitespace()))
            {
                rest = after.trim_start();
                found = true;
                break;
            }
        }
        if !found {
            break;
        }
    }
    false
}

/// Extract parent class names and interface names from a class-like
/// declaration header (e.g. `class Foo extends Bar implements Baz`).