...
- FILE_AND_GRAMMAR_NAME_DIFFER
- LEXER_RULES_NOT_ALLOWED
- PARSER_RULES_NOT_ALLOWED
- CANNOT_ALIAS_TOKENS_IN_LEXER
- ARGS_ON_TOKEN_REF
- ILLEGAL_OPTION
- REWRITE_OR_OP_WITH_NO_OUTPUT_OPTION
- NO_RULES
- REWRITE_FOR_MULTI_ELEMENT_ALT
- HETERO_ILLEGAL_IN_REWRITE_ALT
- AST_OP_WITH_NON_AST_OUTPUT_OPTION
- AST_OP_IN_ALT_WITH_REWRITE
- CONFLICTING_OPTION_IN_TREE_FILTER
- WILDCARD_AS_ROOT
- INVALID_IMPORT
- TOKEN_VOCAB_IN_DELEGATE
- IMPORT_NAME_CLASH
- new errors:
- REPEATED_PREQUEL; repeated options or tokens spec (since we allow in any order now)
- TOKEN_NAMES_MUST_START_UPPER
...