private Expr TryEvaluate(ExprNode e, string exprStr)
{
Expr expr;
object?constantValue = null;
try {
constantValue = ConstantExpressionEvaluator.Evaluate(e);
} catch {
}
if (constantValue is { })
public static bool TryEvaluateAs <T>(ExprNode node, out T result)
{
object?res = new ConstantExpressionEvaluator().Visit(node);
if (res is { } && res is T castRes)