public static void SameThen(PElm p1, PElm p2, Action <PElm, PElm> action)
{
if (p1.Type == p2.Type)
{
action(p1, p2);
}
}
private void DoBinOp(string op)
{
PElm.SameThen(_stack[_sp - 1], _stack[_sp], (p1, p2) =>
{
var value = op switch
{
"add" => p1.Value + p2.Value,
"sub" => p1.Value - p2.Value,
"mul" => p1.Value * p2.Value,
"div" => p1.Value / p2.Value,
"mod" => p1.Value % p2.Value,
"and" => p1.Value && p2.Value,
"or" => p1.Value || p2.Value,
"equ" => p1.Value == p2.Value,
"leq" => p1.Value <= p2.Value,
"les" => p1.Value <p2.Value,
"grt" => p1.Value> p2.Value,
"geq" => p1.Value >= p2.Value,
"neq" => p1.Value != p2.Value,
_ => throw new NotSupportedException()
};
_stack[--_sp] = new PElm(value);
});