private static bool DoTag(Interpreter interpreter, SourceReader reader, State state)
{
reader.Read(TokenType.LeftSquare);
var name = reader.ReadToken();
// Check if metapattern
if (name.Identifier == TokenType.Question)
{
state.AddPreBlueprint(new MetapatternBlueprint(interpreter));
interpreter.PushState(State.CreateDerivedDistinct(reader.Source, reader.ReadToScopeClose(TokenType.LeftSquare, TokenType.RightSquare, BracketPairs.All), interpreter));
return(true);
}
// Check if replacer
if (name.Identifier == TokenType.Regex)
{
return(DoReplacer(name, interpreter, reader, state));
}
if (name.Identifier == TokenType.Dollar)
{
return(reader.IsNext(TokenType.Text) ? DoSubCall(name, interpreter, reader, state) : DoSubDefinition(name, interpreter, reader, state));
}
if (!Util.ValidateName(name.Value.Trim()))
{
throw new RantException(reader.Source, name, "Invalid tag name '" + name.Value + "'");
}
bool none = false;
if (!reader.Take(TokenType.Colon))
{
if (!reader.Take(TokenType.RightSquare))
{
throw new RantException(reader.Source, name, "Expected ':' or ']' after tag name.");
}
none = true;
}
if (none)
{
state.AddPreBlueprint(new TagBlueprint(interpreter, reader.Source, name));
}
else
{
var items = reader.ReadItemsToClosureTrimmed(TokenType.LeftSquare, TokenType.RightSquare,
TokenType.Semicolon, BracketPairs.All).ToArray();
state.AddPreBlueprint(new TagBlueprint(interpreter, reader.Source, name, items));
}
return(true);
}
private static bool DoReplacer(Token <TokenType> name, Interpreter interpreter, SourceReader reader, State state)
{
reader.Read(TokenType.Colon);
var args = reader.ReadItemsToClosureTrimmed(TokenType.LeftSquare, TokenType.RightSquare, TokenType.Semicolon, BracketPairs.All).ToArray();
if (args.Length != 2)
{
throw new RantException(reader.Source, name, "Replacer expected 2 arguments, but got " + args.Length + ".");
}
state.AddPreBlueprint(new ReplacerBlueprint(interpreter, Util.ParseRegex(name.Value), args[1]));
interpreter.PushState(State.CreateDerivedDistinct(reader.Source, args[0], interpreter));
return(true);
}
private static bool DoSubCall(Token <TokenType> first, Interpreter interpreter, SourceReader reader, State state)
{
var name = reader.ReadToken();
if (!Util.ValidateName(name.Value))
{
throw new RantException(reader.Source, name, "Invalid subroutine name '" + name.Value + "'");
}
bool none = false;
if (!reader.Take(TokenType.Colon))
{
if (!reader.Take(TokenType.RightSquare))
{
throw new RantException(reader.Source, name, "Expected ':' or ']' after subroutine name.");
}
none = true;
}
IEnumerable <Token <TokenType> >[] args = null;
Subroutine sub = null;
if (none)
{
if ((sub = interpreter.Engine.Subroutines.Get(name.Value, 0)) == null)
{
throw new RantException(reader.Source, name, "No subroutine was found with the name '" + name.Value + "' and 0 parameters.");
}
}
else
{
args = reader.ReadItemsToClosureTrimmed(TokenType.LeftSquare, TokenType.RightSquare, TokenType.Semicolon,
BracketPairs.All).ToArray();
if ((sub = interpreter.Engine.Subroutines.Get(name.Value, args.Length)) == null)
{
throw new RantException(reader.Source, name, "No subroutine was found with the name '" + name.Value + "' and " + args.Length + " parameter" + (args.Length != 1 ? "s" : "") + ".");
}
}
state.AddPreBlueprint(new SubCallBlueprint(interpreter, reader.Source, sub, args));
return(true);
}