public object Visit(Backpipe expr)
{
object callable = Evaluate(expr.callee);
if (!(callable is ICallable))
{
throw new ErrorHandler.RuntimeError(expr.backpipe, "Expected expression that resolved to a function");
}
//iterate along manually rather than using the tree
for (object iter = expr.following; iter != null; iter = iter is Backpipe ? ((Backpipe)iter).following : null)
{
object arg = Evaluate(iter is Backpipe ? ((Backpipe)iter).callee : (Expr)iter);
((ICallable)callable).Call(this, expr.backpipe, new List <object>()
{
arg
});
}
return(null);
}
public object Visit(Backpipe expr)
{
Resolve(expr.callee);
Resolve(expr.following);
return(null);
}