public void TestGetBySymbol()
{
var o = BinaryOperator.BySymbol("+");
Assert.AreEqual("+", o.Symbol);
Assert.AreEqual(2.0, o.Evaluate(1, 1));
}
public override Node Visit(BinaryOperatorNode node)
{
BinaryOperator newBinaryOperator = node.BinaryOperator;
switch (node.BinaryOperator.Symbol)
{
case "+":
newBinaryOperator = BinaryOperator.BySymbol("-");
break;
case "-":
newBinaryOperator = BinaryOperator.BySymbol("+");
break;
}
return(new BinaryOperatorNode(newBinaryOperator, node.LeftNode.Visit(this), node.RightNode.Visit(this)));
}
public override Node VisitExpression([NotNull] FormulaGrammerParser.ExpressionContext context)
{
int idxMultiplyExpression = 0;
int idxOp = 1;
var multiplyExpression = context.multiplyingExpression(idxMultiplyExpression++);
var node = this.VisitMultiplyingExpression(multiplyExpression);
while ((multiplyExpression = context.multiplyingExpression(idxMultiplyExpression++)) != null)
{
var op = BinaryOperator.BySymbol(context.GetChild(idxOp).GetText());
var right = this.VisitMultiplyingExpression(multiplyExpression);
node = new BinaryOperatorNode(op, node, right);
idxOp += 2;
}
return(node);
}
public void TestGetBySymbol_NotExisting()
{
var o = BinaryOperator.BySymbol("abv");
}