Function is_null_expr

src/completion/variable/forward_walk.rs:8456–8466

Check if an expression is `null`.

(expr: &Expression<'_>)

/// Check if an expression is `null`.
fn is_null_expr(expr: &Expression<'_>) -> bool {
    match expr {
        Expression::Literal(Literal::Null(_)) => true,
        Expression::ConstantAccess(ca) => {
            let name = ca.name.value();
            let clean = crate::util::strip_fqn_prefix(name);
            clean.eq_ignore_ascii_case("null")
        }
        _ => false,
    }
}

/// Extract a direct variable name from an expression.
fn expr_to_var_name(expr: &Expression<'_>) -> Option<String> {