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* [Bug preprocessor/41748] New: Continued lines are not merged into one long line @ 2009-10-19 7:08 d dot g dot gorbachev at gmail dot com 2009-10-19 8:13 ` [Bug preprocessor/41748] " jakub at gcc dot gnu dot org 2009-10-19 13:18 ` [Bug preprocessor/41748] Adjust documentation to reflect new (afrer rev. 152599) cpp behavior d dot g dot gorbachev at gmail dot com 0 siblings, 2 replies; 4+ messages in thread From: d dot g dot gorbachev at gmail dot com @ 2009-10-19 7:08 UTC (permalink / raw) To: gcc-bugs This is a testcase (a space before a backslash or after a newline, and two pairs of quotes (or no quotes at all), are important): "hello," \ "world" In GCC 4.5.0 20091015, preprocessor produces this: # 1 "<stdin>" # 1 "<built-in>" # 1 "<command-line>" # 1 "<stdin>" "hello," "world" whereas older GCC versions give this: # 1 "<stdin>" # 1 "<built-in>" # 1 "<command-line>" # 1 "<stdin>" "hello," "world" Such a new behavior seems to be in contradiction with what the documentation says: "the backslash is removed and the following line is joined with the current one." -- Summary: Continued lines are not merged into one long line Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: preprocessor AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: d dot g dot gorbachev at gmail dot com GCC build triplet: i686-pc-linux-gnu GCC host triplet: i686-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41748 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug preprocessor/41748] Continued lines are not merged into one long line 2009-10-19 7:08 [Bug preprocessor/41748] New: Continued lines are not merged into one long line d dot g dot gorbachev at gmail dot com @ 2009-10-19 8:13 ` jakub at gcc dot gnu dot org 2009-10-19 13:18 ` [Bug preprocessor/41748] Adjust documentation to reflect new (afrer rev. 152599) cpp behavior d dot g dot gorbachev at gmail dot com 1 sibling, 0 replies; 4+ messages in thread From: jakub at gcc dot gnu dot org @ 2009-10-19 8:13 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from jakub at gcc dot gnu dot org 2009-10-19 08:13 ------- The lines are joined into a logical line, that's what the C standard requires. But where do you see requirement that everything on one logical line has to appear on the line in preprocessed output? The reason it is emitted on the next line is to give the second string literal token proper location. The tokens are separate and a compiler compiles both "foo" "bar" and "foo" "bar" the same (as it doesn't record the line numbers for the string literals at all). See PR41445 for why this change has been made. If you care about this because you use the preprocessed output for something else, consider using -P option. That says you don't care about token locations. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41748 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug preprocessor/41748] Adjust documentation to reflect new (afrer rev. 152599) cpp behavior 2009-10-19 7:08 [Bug preprocessor/41748] New: Continued lines are not merged into one long line d dot g dot gorbachev at gmail dot com 2009-10-19 8:13 ` [Bug preprocessor/41748] " jakub at gcc dot gnu dot org @ 2009-10-19 13:18 ` d dot g dot gorbachev at gmail dot com 1 sibling, 0 replies; 4+ messages in thread From: d dot g dot gorbachev at gmail dot com @ 2009-10-19 13:18 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from d dot g dot gorbachev at gmail dot com 2009-10-19 13:17 ------- Ok, thanks for the clarification. I believe this should be documented. -- d dot g dot gorbachev at gmail dot com changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|Continued lines are not |Adjust documentation to |merged into one long line |reflect new (afrer rev. | |152599) cpp behavior http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41748 ^ permalink raw reply [flat|nested] 4+ messages in thread
[parent not found: <bug-41748-4@http.gcc.gnu.org/bugzilla/>]
* [Bug preprocessor/41748] Adjust documentation to reflect new (afrer rev. 152599) cpp behavior [not found] <bug-41748-4@http.gcc.gnu.org/bugzilla/> @ 2011-01-27 10:11 ` d.g.gorbachev at gmail dot com 0 siblings, 0 replies; 4+ messages in thread From: d.g.gorbachev at gmail dot com @ 2011-01-27 10:11 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41748 Dmitry Gorbachev <d.g.gorbachev at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |FIXED --- Comment #3 from Dmitry Gorbachev <d.g.gorbachev at gmail dot com> 2011-01-27 08:35:26 UTC --- Documented on 'Frequently Asked Questions' wiki page: <http://gcc.gnu.org/wiki/FAQ#cpp_continuation_discarded>. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2011-01-27 8:35 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2009-10-19 7:08 [Bug preprocessor/41748] New: Continued lines are not merged into one long line d dot g dot gorbachev at gmail dot com 2009-10-19 8:13 ` [Bug preprocessor/41748] " jakub at gcc dot gnu dot org 2009-10-19 13:18 ` [Bug preprocessor/41748] Adjust documentation to reflect new (afrer rev. 152599) cpp behavior d dot g dot gorbachev at gmail dot com [not found] <bug-41748-4@http.gcc.gnu.org/bugzilla/> 2011-01-27 10:11 ` d.g.gorbachev at gmail dot com
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