private static bool DoSubDefinition(Token <TokenType> first, Interpreter interpreter, SourceReader reader, State state)
{
bool meta = reader.Take(TokenType.Question);
reader.Read(TokenType.LeftSquare);
var parameters = new List <Tuple <string, ParamFlags> >();
var tName = reader.Read(TokenType.Text, "subroutine name");
if (!Util.ValidateName(tName.Value))
{
throw new RantException(reader.Source, tName, "Invalid subroutine name: '" + tName.Value + "'");
}
if (!reader.Take(TokenType.Colon))
{
reader.Read(TokenType.RightSquare);
}
else
{
while (true)
{
bool isTokens = reader.Take(TokenType.At);
parameters.Add(Tuple.Create(reader.Read(TokenType.Text, "parameter name").Value, isTokens ? ParamFlags.Code : ParamFlags.None));
if (reader.Take(TokenType.RightSquare, false))
{
break;
}
reader.Read(TokenType.Semicolon);
}
}
reader.SkipSpace();
reader.Read(TokenType.Colon);
var body = reader.ReadToScopeClose(TokenType.LeftSquare, TokenType.RightSquare, BracketPairs.All).ToArray();
if (meta)
{
interpreter.PushState(State.CreateDerivedDistinct(reader.Source, body, interpreter));
state.AddPreBlueprint(new FunctionBlueprint(interpreter, _ =>
{
_.Engine.Subroutines.Define(tName.Value, Subroutine.FromString(tName.Value, _.PopResultString(), parameters.ToArray()));
return(false);
}));
}
else
{
interpreter.Engine.Subroutines.Define(tName.Value, Subroutine.FromTokens(tName.Value, reader.Source, body, parameters.ToArray()));
}
return(meta);
}
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 DoMath(Interpreter interpreter, SourceReader reader, State state)
{
reader.Read(TokenType.LeftParen);
bool isStatement = reader.Take(TokenType.At);
var tokens = reader.ReadToScopeClose(TokenType.LeftParen, TokenType.RightParen, BracketPairs.All);
interpreter.PushState(State.CreateDerivedDistinct(reader.Source, tokens, interpreter));
state.AddPreBlueprint(new FunctionBlueprint(interpreter, _ =>
{
var v = Parser.Calculate(_, _.PopResultString());
if (!isStatement)
{
_.Print(_.FormatNumber(v));
}
return(false);
}));
return(true);
}