public void TestMethod1()
{
ExpressionOptimizer optimizer = new ExpressionOptimizer();
Expression<Func<int, int, int>> ex = (int x, int y) => F(x) > F(y) ? F(x) : (F(x) < F(2 * y) ? F(2 * y) : F(y));
var a = ex.Compile().Invoke(1, 2);
Object[] lambdaParams = { 1, 2 };
callCount = 0;
int result = (int)Program.OptimizedCalculation(ex, lambdaParams, "F");
Assert.AreEqual(a, result);
Assert.AreEqual(callCount, 3);
Expression<Func<int, int>> ex1 = (int x) => F(F(x)) + F(x) * F(F(x));
a = ex1.Compile().Invoke(2);
lambdaParams = new Object[1] { 2 };
callCount = 0;
result = (int)Program.OptimizedCalculation(ex1, lambdaParams, "F");
Assert.AreEqual(a, result);
Assert.AreEqual(callCount, 3); // плюс один внутренний вызов
}
public static LambdaExpression OptimizeLambda(LambdaExpression lambda, string func)
{
ExpressionOptimizer optimizer = new ExpressionOptimizer();
return (LambdaExpression)optimizer.Optimize(lambda, func);
}
