Questions about syntax parsing

[UtOpiiAa]

When I analyse my g4 file， an exception is raised ： ANT02 error(156): invalid escape sequence \" 。 I don't know how to handle this problem，so I have to delete this '\"'

My full entry is below ：

fragment
ESC_SEQ
: '\\' ('b'|'t'|'n'|'f'|'r'|'\"'|'\''|'\\')
| UNICODE_ESC
| OCTAL_ESC
;

[kaby76]

You don't need to "escape" a double quote. So instead of '\"' it should be '"'.

[UtOpiiAa]

Thank you very much！That problem bothered me for a long time because original antlr4 didn't recognize this error.

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