// funCall: [funCall] assign
AstNode FunCall()
{
var a = Assign();
for (;;)
{
if (IsEof() || Is(TT.RightParen) ||
Is(TT.Question) || Is(TT.Colon))
{
return(a);
}
Pos p = pos;
a = new AstNode.FunCall(p, a, Assign());
}
}
public EvalObject Visit(AstNode.FunCall v)
{
var fun = Eval(v.fun);
switch (fun)
{
case EvalObject.Int:
throw new EvalException(v.pos, "Int is not callable");
case EvalObject.Builtin b:
return(b.Call(Eval(v.arg)));
case EvalObject.Lambda l:
return(l.Call(Eval(v.arg), env));
default:
throw new InvalidOperationException();
}
}