public virtual api.Function resolveFunction(string localName, int arity)
{
api.Function f = (api.Function)_functions[signature(localName, arity)];
if (f != null || arity == -1)
{
return(f);
}
// see if we got a varg one
f = (api.Function)_functions[signature(localName, -1)];
// nope
if (f == null)
{
return(null);
}
if (f.canMatchArity(arity))
{
return(f);
}
return(null);
}
/// <summary>
/// Obtain the function name and arity from signature.
/// </summary>
/// <param name="f">
/// current function. </param>
/// <returns> Signature. </returns>
private static string signature(api.Function f)
{
return(signature(f.Name, f.VariableArgument ? -1 : f.MinArity));
}
/// <summary>
/// Add a function.
/// </summary>
/// <param name="x">
/// function to add. </param>
public virtual void addFunction(api.Function x)
{
_functions[signature(x)] = x;
}
