Function resolve_to_fqn

src/util.rs:35–66

Resolve an unqualified or partially-qualified PHP class/function name to a fully-qualified name using the file's `use` map and namespace. Rules: - Leading `\` — strip it and return (already fully-qualified). - Unqualified (no `\`): 1. Check the `use_map` for a direct mapping. 2. Prefix with the current namespace. 3. Fall back to the bare name (global namespace). - Qualified (contains `\`, no lead

(
    name: &str,
    use_map: &HashMap<String, String>,
    namespace: &Option<String>,
)

///     2. Prefix with the current namespace.
///     3. Fall back to the bare name.
pub(crate) fn resolve_to_fqn(
    name: &str,
    use_map: &HashMap<String, String>,
    namespace: &Option<String>,
) -> String {
    // Already fully-qualified with leading `\` — strip and return.
    if let Some(stripped) = name.strip_prefix('\\') {
        return stripped.to_string();
    }

    // Unqualified name (no backslash) — try use_map, then namespace, then bare.
    if !name.contains('\\') {
        if let Some(fqn) = use_map.get(name) {
            return fqn.clone();
        }
        if let Some(ns) = namespace {
            return format!("{}\\{}", ns, name);
        }
        return name.to_string();
    }

    // Qualified name (contains `\` but no leading `\`).
    let first_segment = name.split('\\').next().unwrap_or(name);
    if let Some(fqn_prefix) = use_map.get(first_segment) {
        let rest = &name[first_segment.len()..];
        return format!("{}{}", fqn_prefix, rest);
    }
    if let Some(ns) = namespace {
        return format!("{}\\{}", ns, name);
    }
    name.to_string()
}

/// Resolve a class name to its FQN via the class loader.
///