private Function Resolve(string Token, IEnumerable <Expression> Args)
{
Function resolve = context.LookupFunction(Token, Args).SingleOrDefault();
if (!(resolve is null))
{
return(resolve);
}
private Function Resolve(string Token, IEnumerable <Expression> Args)
{
Function resolve = context.LookupFunction(Token, Args).SingleOrDefault();
if (!ReferenceEquals(resolve, null))
{
return(resolve);
}
else
{
return(UnknownFunction.New(Token, Args.Count()));
}
}
protected override Expression VisitCall(Call F)
{
F = (Call)base.VisitCall(F);
if (F.Target is UnknownFunction)
{
IEnumerable <Function> lookup = ns.LookupFunction(F.Target.Name, F.Arguments);
switch (lookup.Count())
{
case 0: return(F);
case 1: return(Call.New(lookup.Single(), F.Arguments));
default: throw new UnresolvedName(F.Target.Name);
}
}
return(F);
}
