Hi:
I work in Csharp's parser files by LEX/YACC.Now I have only CSharp-lex.l
and CSharp.y file,but they not have CSharp'comment Parse. this is a part of
CSharp-lex.l.
............... ......
/***** Comments *****/
"/*" { yy_push_state(I N_COMMENT); }
<IN_COMMENT>. { ; /* ignore */ }
<IN_COMMENT>\ n { ; /* ignore */ }
<IN_COMMENT>" */" { yy_pop_state(); }
{single_line_co mment} { ; /* ignore */ }
............... ....
CSharp.y file not have any more comment regular.
Now I need comment parser in CSharp-lex.l. and CSharp.y files. Who give me
the files?
THS
EKEY
05.1.31 2 4553 go****@wain-sh.com wrote: /***** Comments *****/ "/*" { yy_push_state(I N_COMMENT); } <IN_COMMENT>. { ; /* ignore */ } <IN_COMMENT>\ n { ; /* ignore */ } <IN_COMMENT>" */" { yy_pop_state(); }
{single_line_co mment} { ; /* ignore */ }
I'm afraid I didn't understand your question, but the above snippet is using
lex start conditions to parse C-style comments, as used in C#. You can read
more about them here: http://www.gnu.org/software/flex/man..._11.html#SEC11
On this page you will also find a much more efficient snippet of code for
parsing the same thing:
"/*" BEGIN(comment);
<comment>[^*\n]* /* eat anything that's not a '*' */
<comment>"*"+[^*/\n]* /* eat up '*'s not followed by '/'s */
<comment>\n ++line_num;
<comment>"*"+ "/" BEGIN(INITIAL);
It's more efficient because it "eats" large strings of comment characters,
instead of eating one character at a time. You would simply add it somewhere
in your .y file. (line_num is assumed to be an integer variable tracking the
current line number). I hope this helps.
--
Derrick Coetzee, Microsoft Speech Server developer
This posting is provided "AS IS" with no warranties, and confers no rights.
If you look for a C# parser, try http://www.c-sharpcorner.com/Code/20...CodeParser.asp
Lionel.
"news.microsoft .com" <go****@wain-sh.com> a ecrit dans le message de news: ez************* *@TK2MSFTNGP15. phx.gbl... Hi: I work in Csharp's parser files by LEX/YACC.Now I have only CSharp-lex.l and CSharp.y file,but they not have CSharp'comment Parse. this is a part of CSharp-lex.l.
............... ..... /***** Comments *****/ "/*" { yy_push_state(I N_COMMENT); } <IN_COMMENT>. { ; /* ignore */ } <IN_COMMENT>\ n { ; /* ignore */ } <IN_COMMENT>" */" { yy_pop_state(); }
{single_line_co mment} { ; /* ignore */ } ............... ...
CSharp.y file not have any more comment regular.
Now I need comment parser in CSharp-lex.l. and CSharp.y files. Who give me the files?
THS EKEY 05.1.31 This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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