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gzdoom/tools/re2c/examples/002_strip_comments/README

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2016-02-07 02:58:35 +00:00
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