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我发现下面的Antlr 4语法：ANTLR的V4文法的XQuery 3.1
error(134): xquery31.g4:178:26: rule reference PragmaContentsInternal is not currently supported in a set
error(134): xquery31.g4:264:25: rule reference DirPIContentsInternal is not currently supported in a set
error(134): xquery31.g4:268:32: rule reference CDataSectionContentsInternal is not currently supported in a set
error(134): xquery31.g4:311:17: rule reference StringConstructorCharsInternal is not currently supported in a set
warning(156): xquery31.g4:377:59: invalid escape sequence
warning(156): xquery31.g4:378:60: invalid escape sequence
warning(156): xquery31.g4:392:30: invalid escape sequence
warning(156): xquery31.g4:394:30: invalid escape sequence
error(134): xquery31.g4:416:27: rule reference CommentContentsInternal is not currently supported in a set
warning(146): xquery31.g4:13:0: non-fragment lexer rule Prolog can match the empty string
warning(146): xquery31.g4:110:0: non-fragment lexer rule WindowVars can match the empty string
warning(146): xquery31.g4:127:0: non-fragment lexer rule OrderModifier can match the empty string
warning(146): xquery31.g4:211:0: non-fragment lexer rule PredicateList can match the empty string
warning(146): xquery31.g4:248:0: non-fragment lexer rule DirAttributeList can match the empty string
warning(146): xquery31.g4:261:0: non-fragment lexer rule DirCommentContents can match the empty string
error(99): xquery31.g4::: grammar xquery31 has no rules
是否有：
https://gist.github.com/JoeyAcc/829c28fcf18091ed6ebfcf91d7519f58
我试图从其生成代码收到以下错误解决这个ANTLR V4语法的建议？