Re: Java Comment-Preserving Grammar

>> Scanner Usually Skips Over Comments In The Source Code Already,
>> Such That The Parser Doesn'T Even See Them. However, You Can Write
>> Your Own Scanner And Parser, That Make Comments Explicit In The Grammer.
>> But If You Want To Allow Comments _Anywhere_ In Yout Language, The
>> Good Luck!! :-) That Grammar Is Going To Be A Mess....


>> Would it be that hard? Most languages that I know
>> of allow comments in places where blank space is allowed.


Many languages allow space/comments between any adjacent tokens. In such
cases, you could replace every <token> in the grammar with
<token><whitespace/comment?> (with some extra cruft at the start).


But this (regular) behavior is can also be captured in the lexer by
associating the whitespace/comment to the preceding token. Or maybe the
following.


--
mac the naïf

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