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Build # 10995570458

Build Type

push

github

Committed by web-flow

Commit Message

grep: implement -x for fixed strings

* Standards document mentions that option -x should work with fixed strings [1]
* This version didn't allow -x with -F; add it now for better compliance with standard
* I have a small test file with some C code
* test1: "perl grep int a.c" --> matches "int\n" and "printf(...);\n"
* test2: "perl grep -i Int a.c" --> same match as test1
* test3: "perl grep -iv Int a.c" --> matches all except "int\n" and "printf(...);\n"
* test4: "perl grep -v Int a.c" --> matches all lines because Int doesn't appear at all
* test5: "perl grep -F -x int a.c" --> matches only "int\n"
* test6: "perl grep -Fxi Int a.c" --> same match as test5
* test7: "perl grep -Fxiv Int a.c" --> matches all except "int\n"
* test8: "perl grep -Fxv Int a.c" --> matches all lines because Int doesn't appear at all

1. https://pubs.opengroup.org/onlinepubs/9699919799/utilities/grep.html

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