public void SubstitutionTestId()
{
BaseExpression expr = BaseExpression.Parse("x + y + z");
BaseExpression expr2 = expr.Subst(new Dictionary <string, BaseExpression>());
Assert.AreEqual(expr.ToString(), expr2.ToString());
}
public override BaseExpression Visit(BaseExpression expression)
{
if (expression.IsConstant)
{
var v = expression.TryStaticEvaluate();
if (v.HasValue)
{
// Do not substitute the constant value if it is a longer string than the expression
if (!_allowLonger && v.ToString().Length > expression.ToString().Length)
{
return(base.Visit(expression));
}
if (v.Value.Type == Type.Number)
{
return(base.Visit(new ConstantNumber(v.Value.Number)));
}
else
{
return(base.Visit(new ConstantString(v.Value.String)));
}
}
}
return(base.Visit(expression));
}
public void SubstitutionTestId2()
{
BaseExpression expr = BaseExpression.Parse("1 + 2 + x + y");
var subst = new Dictionary <string, BaseExpression>();
subst["a"] = new IntegerExpression(3);
subst["b"] = new IntegerExpression(9);
BaseExpression expr2 = expr.Subst(subst);
Assert.AreEqual(expr.ToString(), expr2.ToString());
}
public override string ToString()
{
return(_expr.ToString());
}
/// <summary>
/// Define a conditional transformation
/// </summary>
/// <param name="expression">An expression</param>
/// <returns>The transformation for chaining</returns>
public Transformation IfCondition(BaseExpression expression)
{
return(IfCondition(expression.ToString()));
}
public override string ToCode()
{
return(BaseExpression != null?BaseExpression.ToString() : RepresentedType != null?RepresentedType.ToString() : "null");
}
public override string ToCode()
{
return(BaseExpression == null ? (Variable == null ?"null":Variable.ToString(false)) : BaseExpression.ToString());
}