public static MultiVariableFunction FromString(string expression, params string[] variableNames)
{
var ctx = VariableContext.FromVariableNames(variableNames);
var root = StringTokenizer.ToExpression(expression, ctx);
return(new MultiVariableFunction(root, variableNames));
}
public static SingleVariableFunction FromString(string expression, string variableName)
{
var ctx = VariableContext.FromVariableNames(new List <string> {
variableName
});
var root = StringTokenizer.ToExpression(expression, ctx);
return(new SingleVariableFunction(root, variableName));
}
public static void CanSubstituteAndEvaluateFunction()
{
var ctx = VariableContext.FromVariableNames("x");
var tree = StringTokenizer.ToExpression(" 2 * x", ctx);
var function = new SingleVariableFunction(tree, "x");
Assert.AreEqual(4, function.Call(2).AsInt);
Assert.AreEqual(10, function.Call(5).AsInt);
}
public VariableContext GenerateContext()
{
return(VariableContext.FromVariableNames(AllNames()));
}
public SingleVariableFunction(ISymbol root, string variableName)
: base(root, VariableContext.FromVariableNames(new List <string> { variableName }))
{
VariableName = variableName;
}
public MultiVariableFunction(ISymbol root, params string[] variableNames)
: base(root, VariableContext.FromVariableNames(variableNames))
{
VariableNames = variableNames;
}