From: php at koterov dot ru Operating system: all PHP version: 5.2.6 PHP Bug Type: Feature/Change Request Bug description: Support of #line instruction for parser context substitutuon
Description: ------------ In Perl, we could write the following program test.pl (lines are enumerated for better look): 01 #!/usr/bin/perl -w 02 print "hello!\n"; 03 print "something!\n"; 04 05 #line 100 "aaa.pl" 06 print $undefined_var; This code generates a warning message "Using of undefined variable", but (attention!) - the context of this error is NOT "test.pl line 5", but - "aaa.pl line 100". So, the "pseudo-comment" operator #line xxx "yyy" in Perl substitutes the current parsing context to a specified line number and filename. (You may ommit filename, then - only the line number will be substituted). And, if a warning or a fatal error occurs, the line number and filename in the error message will be changed. There is the same feature in C language: it is used by C preprocessor to execute #include directives an keep line numbers clear to understand. This feature is VERY VERY useful when we write some code translator (e.g. from a templating language to pure PHP). This kind of translation is done e.g. in Smarty: it translates Smarty templates into pure PHP code, but line numbers are mixed up in translated files, so we cannot revert back and detect which line of the template had produced an error. Please say, do you plan to add this feature to a new PHP versions? I'd like to ask you very much about it... -- Edit bug report at http://bugs.php.net/?id=45111&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=45111&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=45111&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=45111&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=45111&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=45111&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=45111&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=45111&r=needscript Try newer version: http://bugs.php.net/fix.php?id=45111&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=45111&r=support Expected behavior: http://bugs.php.net/fix.php?id=45111&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=45111&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=45111&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=45111&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45111&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=45111&r=dst IIS Stability: http://bugs.php.net/fix.php?id=45111&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=45111&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=45111&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=45111&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=45111&r=mysqlcfg
