Function is_extractable_literal

src/code_actions/extract_constant.rs:33–66

Returns `true` when the trimmed selection text looks like a PHP literal that can be extracted into a class constant.

(text: &str)

/// Returns `true` when the trimmed selection text looks like a PHP
/// literal that can be extracted into a class constant.
fn is_extractable_literal(text: &str) -> bool {
    let t = text.trim();
    if t.is_empty() {
        return false;
    }

    // String literals
    if (t.starts_with('\'') && t.ends_with('\'')) || (t.starts_with('"') && t.ends_with('"')) {
        return t.len() >= 2;
    }

    // Boolean / null literals
    let lower = t.to_ascii_lowercase();
    if matches!(lower.as_str(), "true" | "false" | "null") {
        return true;
    }

    // Numeric literals (integer or float)
    if is_numeric_literal(t) {
        return true;
    }

    // Concatenated string expression: `'a' . 'b'`
    if is_concat_expression(t) {
        return true;
    }

    // Negative numeric literal: `-42`, `-3.14`
    if t.starts_with('-') && is_numeric_literal(t[1..].trim_start()) {
        return true;
    }

    false
}

/// Returns `true` when the text is a numeric literal (integer or float,
/// including hex `0x`, octal `0o`, binary `0b`, and underscored forms).