Antlr4.Semantics.BasicSemanticChecks.CheckTokenDefinition C# (CSharp) Method

        internal virtual void CheckTokenDefinition(IToken tokenID)
        {
            string fileName = tokenID.InputStream.SourceName;
            if (!Grammar.IsTokenName(tokenID.Text))
            {
                g.tool.errMgr.GrammarError(ErrorType.TOKEN_NAMES_MUST_START_UPPER,
                                           fileName,
                                           tokenID,
                                           tokenID.Text);
            }
        }