* libcpp backtrack lexer
@ 2014-02-24 19:25 Prathamesh Kulkarni
2014-02-26 19:30 ` Prathamesh Kulkarni
0 siblings, 1 reply; 2+ messages in thread
From: Prathamesh Kulkarni @ 2014-02-24 19:25 UTC (permalink / raw)
To: gcc-help
How do I backtrack the lexer to restart lexing from a particular token
on the same
line ?
Shall this be correct: ?
cpp_token *cur_token = pfile->cur_token;
if (foo (pfile) == 0) // foo advances pfile->cur_token
pfile->cur_token = cur_token; // restart lexing from cur_token
foo does not advance pfile->cur_token beyond the same line, so I guess
cur_token shall still be pointing to a valid token (since tokens on
the same line are preserved) ?
Thanks and Regards,
Prathamesh
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: libcpp backtrack lexer
2014-02-24 19:25 libcpp backtrack lexer Prathamesh Kulkarni
@ 2014-02-26 19:30 ` Prathamesh Kulkarni
0 siblings, 0 replies; 2+ messages in thread
From: Prathamesh Kulkarni @ 2014-02-26 19:30 UTC (permalink / raw)
To: gcc-help
Ping ?
On Tue, Feb 25, 2014 at 12:55 AM, Prathamesh Kulkarni
<bilbotheelffriend@gmail.com> wrote:
> How do I backtrack the lexer to restart lexing from a particular token
> on the same
> line ?
> Shall this be correct: ?
> cpp_token *cur_token = pfile->cur_token;
> if (foo (pfile) == 0) // foo advances pfile->cur_token
> pfile->cur_token = cur_token; // restart lexing from cur_token
>
> foo does not advance pfile->cur_token beyond the same line, so I guess
> cur_token shall still be pointing to a valid token (since tokens on
> the same line are preserved) ?
>
> Thanks and Regards,
> Prathamesh
^ permalink raw reply [flat|nested] 2+ messages in thread
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