private static AstNode ParseEnum(TokenStream stream)
{
stream.Expect (TokenClass.Keyword, "enum");
string name = stream.Expect (TokenClass.Identifier).Value;
EnumDeclaration decl = new EnumDeclaration (stream.Location, name);
stream.Expect (TokenClass.OpenBrace);
int defaultVal = -1;
while (!stream.Match (TokenClass.CloseBrace)) {
string ident = stream.Expect (TokenClass.Identifier).Value;
if (stream.Accept (TokenClass.Operator, "=")) {
string val = stream.Expect (TokenClass.IntLiteral).Value;
int numVal = 0;
if (val != "") {
numVal = Int32.Parse (val);
}
decl.Items [ident] = numVal;
} else {
decl.Items [ident] = defaultVal--;
}
if (!stream.Accept (TokenClass.Comma)) {
break;
}
}
stream.Expect (TokenClass.CloseBrace);
return decl;
}
private IodineEnum CompileEnum(EnumDeclaration enumDecl)
{
IodineEnum ienum = new IodineEnum (enumDecl.Name);
foreach (string name in enumDecl.Items.Keys) {
ienum.AddItem (name, enumDecl.Items [name]);
}
return ienum;
}
public override void Accept (EnumDeclaration enumDecl)
{
IodineEnum ienum = new IodineEnum (enumDecl.Name);
foreach (string name in enumDecl.Items.Keys) {
ienum.AddItem (name, enumDecl.Items [name]);
}
methodBuilder.EmitInstruction (enumDecl.Location, Opcode.LoadConst,
methodBuilder.Module.DefineConstant (ienum));
methodBuilder.EmitInstruction (enumDecl.Location, Opcode.StoreLocal,
symbolTable.GetSymbol (enumDecl.Name).Index);
}
public void Accept(EnumDeclaration enumDecl)
{
module.SetAttribute (enumDecl.Name, CompileEnum (enumDecl));
}
public override void Accept (EnumDeclaration enumDecl)
{
errorLog.AddError (ErrorType.ParserError, enumDecl.Location,
"statement can not exist inside pattern!");
}
public virtual void Accept(EnumDeclaration enumDecl)
{
}
public void Accept(EnumDeclaration enumDecl)
{
symbolTable.AddSymbol (enumDecl.Name);
}
public void Accept(EnumDeclaration enumDecl)
{
}
