public override void HandleFunctionNode(TreeWalker walker, FunctionNode function)
{
List<Node> arguments = function.GetArguments(1);
LabelNode labelNode = VerifyType<LabelNode>(arguments[0]);
walker.scriptBuilder.EmitStatement($"jump {TreeWalker.MangleLabelName(labelNode.labelName)}");
}
//Return statements can take either no argument, or a label as argument (the return destination).
public Node HandleReturn()
{
Lexeme returnWord = Pop();
LabelNode returnDestination = null;
if (HasCurrent() && Peek().type == LexemeType.LABEL)
{
returnDestination = new LabelNode(Pop());
}
return(new ReturnNode(returnWord, returnDestination));
}
public override void HandleFunctionNode(TreeWalker walker, FunctionNode function)
{
List<Node> arguments = function.GetArguments(1);
LabelNode gosubTargetLabel = VerifyType<LabelNode>(arguments[0]);
walker.scriptBuilder.EmitStatement($"call {gosubTargetLabel.labelName}");
}
public LabelNode returnDestination; //can be null if no return destination given.
public ReturnNode(Lexeme lexeme, LabelNode returnDestination) : base(lexeme)
{
this.returnDestination = returnDestination;
}