public override object VisitEnumTypeDefDecl(PParser.EnumTypeDefDeclContext context)
{
// ENUM name=iden
PEnum pEnum = (PEnum)nodesToDeclarations.Get(context);
// LBRACE enumElemList RBRACE
if (context.enumElemList() is PParser.EnumElemListContext elemList)
{
EnumElem[] elems = (EnumElem[])Visit(elemList);
for (int i = 0; i < elems.Length; i++)
{
EnumElem elem = elems[i];
elem.Value = i;
pEnum.AddElement(elem);
}
}
// | LBRACE numberedEnumElemList RBRACE
else if (context.numberedEnumElemList() is PParser.NumberedEnumElemListContext numberedElemList)
{
EnumElem[] numberedElems = (EnumElem[])Visit(numberedElemList);
foreach (EnumElem elem in numberedElems)
{
pEnum.AddElement(elem);
}
}
else
{
Debug.Fail("grammar requires enum declarations to have element lists");
}
return(pEnum);
}
public override object VisitNumberedEnumElem(PParser.NumberedEnumElemContext context)
{
string symbolName = context.name.GetText();
EnumElem elem = CurrentScope.Put(symbolName, context);
nodesToDeclarations.Put(context, elem);
return(null);
}
public EnumElem Put(string name, PParser.NumberedEnumElemContext tree)
{
EnumElem enumElem = new EnumElem(name, tree);
CheckConflicts(enumElem, Namespace(enumElems), Namespace(events));
enumElems.Add(name, enumElem);
return(enumElem);
}
public override object VisitNumberedEnumElem(PParser.NumberedEnumElemContext context)
{
// name=iden ASSIGN value=IntLiteral
EnumElem elem = (EnumElem)nodesToDeclarations.Get(context);
elem.Value = int.Parse(context.value.Text);
return(elem);
}
public bool Lookup(string name, out EnumElem tree)
{
Scope current = this;
while (current != null)
{
if (current.Get(name, out tree))
{
return(true);
}
current = current.Parent;
}
tree = null;
return(false);
}
public string GetEnumElementName(EnumElem elem)
{
return(elem.Name);
}
public bool Get(string name, out EnumElem tree)
{
return(enumElems.TryGetValue(name, out tree));
}
public EnumElemRefExpr(ParserRuleContext sourceLocation, EnumElem enumElem)
{
SourceLocation = sourceLocation;
EnumElem = enumElem;
Type = new EnumType(EnumElem.ParentEnum);
}