Subparser feature

A interresting feature would be to be able to compose parsers using special attributes in production rules:

 public enum EToken
    {
        [Lexeme(GenericToken.Identifier, IdentifierType.AlphaNumeric)]
        ID = 1,
        
        [Lexeme(GenericToken.Int)]
        INT = 2
    }

    public class Parser
    {
        [Production("main : ID subRuleParser INT")]
        public object Main(Token<EToken> id, object subParsed, Token<EToken> integer)
        {
            // do something here
            return null;
        }
        
        // declare use of SubParserType class as a subParser
        [Production("subRuleParser : SubParser(SubParserType) ")]
        public object subParsed(object value)
        {
            return value;
        }
    }

    public class SubParserType
    {
        [Production("submain : ID ")] // root rule
        public object SubMain(Token<EToken> id)
        {
            return id.Value;
        }        
    }

All the parsers constituing the global parser mus have the exact same type (Parser<ETOken,object> in above exemple) Instead of defining a dedicated rule for subparser it could be defined inside the production rule

[Production("main : ID subRuleParser[SubParser(SubParserType) INT")]
        public object Main(Token<EToken> id, object subParsed, Token<EToken> integer)
        {
            // do something here
            return null;
        }

this notation is terser but first one allow reuse if necessary (bot could exist at the same time)

[b3b00]

@znakeeye I 've just push a prerelease nuget version 2.7.0-alpha . you can use it to test token channels if you want

[b3b00]

hello @znakeeye , No I did not merge it to dev branch. I am still thinking of the real value of the feature compared to the added complexity.

you still can give it a try cloning my repo and using branch experiment/islands

I am quiet affraid by the documentation work needed to clearly explain channels and islands. these are not classic parsing concept but more antlr specifics.

i would greatly appreciate help for it if your still interested.