Antlr4.Semantics.SemanticPipeline.AssignChannelTypes C# (CSharp) Method

        internal virtual void AssignChannelTypes(Grammar g, IList<GrammarAST> channelDefs)
        {
            Grammar outermost = g.GetOutermostGrammar();
            foreach (GrammarAST channel in channelDefs)
            {
                string channelName = channel.Text;

                // Channel names can't alias tokens or modes, because constant
                // values are also assigned to them and the ->channel(NAME) lexer
                // command does not distinguish between the various ways a constant
                // can be declared. This method does not verify that channels do not
                // alias rules, because rule names are not associated with constant
                // values in ANTLR grammar semantics.

                if (g.GetTokenType(channelName) != TokenConstants.InvalidType)
                {
                    g.tool.errMgr.GrammarError(ErrorType.CHANNEL_CONFLICTS_WITH_TOKEN, g.fileName, channel.Token, channelName);
                }

                if (LexerATNFactory.COMMON_CONSTANTS.ContainsKey(channelName))
                {
                    g.tool.errMgr.GrammarError(ErrorType.CHANNEL_CONFLICTS_WITH_COMMON_CONSTANTS, g.fileName, channel.Token, channelName);
                }

                if (outermost is LexerGrammar)
                {
                    LexerGrammar lexerGrammar = (LexerGrammar)outermost;
                    if (lexerGrammar.modes.ContainsKey(channelName))
                    {
                        g.tool.errMgr.GrammarError(ErrorType.CHANNEL_CONFLICTS_WITH_MODE, g.fileName, channel.Token, channelName);
                    }
                }

                outermost.DefineChannelName(channel.Text);
            }
        }
    }