zdoom/qzdoom-gpl
0
0
Fork 0
mirror of https://github.com/ZDoom/qzdoom-gpl.git synced 2024-12-13 05:30:54 +00:00
Code Issues Projects Releases Packages Wiki Activity
qzdoom-gpl/tools/re2c/examples/002_strip_comments
History
Randy Heit 43c6c9b5ee Update re2c to version 0.16
2016-02-06 20:58:35 -06:00
..
README Update re2c to version 0.16 2016-02-06 20:58:35 -06:00
strip_001.s.re Update re2c to version 0.16 2016-02-06 20:58:35 -06:00
strip_002.s.re Update re2c to version 0.16 2016-02-06 20:58:35 -06:00
strip_003.b.re Update re2c to version 0.16 2016-02-06 20:58:35 -06:00

README 

re2c lesson 002_strip_comments, (c) M. Boerger 2006

In this lesson you will learn how to use multiple scanner blocks and how to 
read the input from a file instead of a zero terminated string. In the end you
will have a scanner that filters comments out of c source files but keeps re2c
comments.

The first scanner can be generated with:

  re2c -s -o t.c strip_001.s.re

In the second step we will learn about YYMARKER that stores backtracking 
information.

  re2c -s -0 t.c strip_002.b.re

The third step brings trailing contexts that are stored in YYCTXMARKER. We also
change to use -b instead of -s option since the scanner gets more and more
complex.

  re2c -b -0 t.c strip_002.b.re