public override bool Evaluate(InterpreterScope scope, out ExpressionBase result)
{
var left = GetIntegerParameter(scope, "left", out result);
var right = GetIntegerParameter(scope, "right", out result);
var mathematic = new MathematicExpression(left, MathematicOperation.Add, right);
return(mathematic.ReplaceVariables(scope, out result));
}
public void TestAddStrings()
{
var left = new StringConstantExpression("ban");
var right = new StringConstantExpression("ana");
var expr = new MathematicExpression(left, MathematicOperation.Add, right);
var scope = new InterpreterScope();
ExpressionBase result;
Assert.That(expr.ReplaceVariables(scope, out result), Is.True);
Assert.That(result, Is.InstanceOf <StringConstantExpression>());
Assert.That(((StringConstantExpression)result).Value, Is.EqualTo("banana"));
}
public void TestBitwiseAndZero()
{
var left = new IntegerConstantExpression(0xCF);
var right = new IntegerConstantExpression(0);
var expr = new MathematicExpression(left, MathematicOperation.BitwiseAnd, right);
var scope = new InterpreterScope();
ExpressionBase result;
Assert.That(expr.ReplaceVariables(scope, out result), Is.True);
Assert.That(result, Is.InstanceOf <IntegerConstantExpression>());
Assert.That(((IntegerConstantExpression)result).Value, Is.EqualTo(0));
}
public void TestAddZero()
{
var left = new FunctionCallExpression("byte", new[] { new IntegerConstantExpression(0) });
var right = new IntegerConstantExpression(0);
var expr = new MathematicExpression(left, MathematicOperation.Add, right);
var scope = new InterpreterScope();
scope.Context = new TriggerBuilderContext();
scope.AddFunction(new MemoryAccessorFunction("byte", FieldSize.Byte));
ExpressionBase result;
Assert.That(expr.ReplaceVariables(scope, out result), Is.True);
Assert.That(result.ToString(), Is.EqualTo(left.ToString()));
}
public void TestModulusZero()
{
var left = new FunctionCallExpression("byte", new[] { new IntegerConstantExpression(0) });
var right = new IntegerConstantExpression(0);
var expr = new MathematicExpression(left, MathematicOperation.Modulus, right);
var scope = new InterpreterScope();
scope.Context = new TriggerBuilderContext();
scope.AddFunction(new MemoryAccessorFunction("byte", FieldSize.Byte));
ExpressionBase result;
Assert.That(expr.ReplaceVariables(scope, out result), Is.False);
Assert.That(((ParseErrorExpression)result).Message, Is.EqualTo("Division by zero"));
}
public void TestAddVariables()
{
var value1 = new IntegerConstantExpression(1);
var value2 = new IntegerConstantExpression(2);
var left = new VariableExpression("left");
var right = new VariableExpression("right");
var expr = new MathematicExpression(left, MathematicOperation.Add, right);
var scope = new InterpreterScope();
scope.AssignVariable(left, value1);
scope.AssignVariable(right, value2);
ExpressionBase result;
Assert.That(expr.ReplaceVariables(scope, out result), Is.True);
Assert.That(result, Is.InstanceOf <IntegerConstantExpression>());
Assert.That(((IntegerConstantExpression)result).Value, Is.EqualTo(3));
}