Rob, The input file you described is not correct, since it has #ifdef def2 statement3; #else statement4; #endif nested within another #ifdef ... #else ... #endif. My input file is the output of "diff -D def file1 file2" (on unix). This will generate a file which has the following patterns and none of the patterns can be nested within the other:
#ifdef .... #else ... #endif #ifndef .... #else ... #endif #ifdef .... #endif #ifndef .... #endif I need to substitute the above patterns to be read by a home grown program. I encountered a problem due to the following reason. There was: #ifndef def .... #endif def - Call it sentence1 #ifndef def ... #else def ... #endif def - Call it sentence2 I tried the following line but it matched sentence1 and sentence2 together. I need to match sentence1 and sentence2 seperately. $line1 =~ m/#ifndef\s+def(.*?)#else\s+def(.*?)#endif\s+def/isg For this #ifndef def (...1...) #else def (...2...) #endif def should be matched only if #if is not there within (...1...) and (...2...). Hopefully I have conveyed it more clearly. Thanks, Raghu ====================================================== Raghupathy wrote: > Hi All, > > I have a text file as shown below. How do I match > patterns like the following: > > Pattern to be matched: > ========================= > #ifndef def > ...... (anything except #if) > #else def > ....... (anything except #if) > #endif def > > > My Input Data: > ===================================================== > #ifndef def > DELETE sys1..tbl1 > #endif def > > SELECT col1, col2, col3 > #ifndef def > FROM sys1..tbl1 > #else def > FROM sys1..tbl2 > #endif def > WHERE schdid is not null > > ===================================================== > > What I tried is below (but did not work since it > captured patterns which had "#if" nested within the > main pattern). > > $line1 =~ > m/#ifndef\s+def(.*?)#else\s+def(.*?)#endif\s+def/isg > I thought I knew what you meant, but then I changed my mind! If your input file is, say statement1; #ifdef def1 statement2; #ifdef def2 statement3; #else statement4; #endif statement5; #else statement6; #ifdef def3 statement7; #else statement8; #endif statement9; #endif What is it that you want to capture? Rob __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
