Function is_concat_expression

src/code_actions/extract_constant.rs:156–174

Returns `true` when the text is a concatenated string expression like `'prefix_' . 'suffix'`. Each segment must be a string literal or a numeric literal separated by `.` operators.

(text: &str)

/// like `'prefix_' . 'suffix'`. Each segment must be a string literal
/// or a numeric literal separated by `.` operators.
fn is_concat_expression(text: &str) -> bool {
    if !text.contains('.') {
        return false;
    }

    // Split on ` . ` (the PHP concatenation operator with typical spacing).
    // We also handle `.` without spaces.
    let parts = split_concat_parts(text);
    if parts.len() < 2 {
        return false;
    }

    parts.iter().all(|p| {
        let t = p.trim();
        (t.starts_with('\'') && t.ends_with('\'') && t.len() >= 2)
            || (t.starts_with('"') && t.ends_with('"') && t.len() >= 2)
            || is_numeric_literal(t)
    })
}

/// Split a string on the PHP `.` concatenation operator, respecting
/// string literal boundaries.