Math::Expression::Evaluator::Util - Common functions for Math::Expression::Evaluator

    use Math::Expression::Evaluator::Util qw(is_lvalue);

    # ...
    if (is_lvalue($ast)){
        # $ast represents an lvalue, at the moment just a variable
    }

This is package with common functions used in the different modules in the Math::Expression::Evaluator distribution.

is_lvalue

is_lvalue($ast) checks if (a simplified version of) $ast represents something that can be assigned to, i.e. is a variable.