Hi list, the guile documentation under https://www.gnu.org/software/guile/manual/html_node/Regular-Expressions.html#index-regular-expressions directly references Regular expressions used in Emacs which do support non-greedy regexp. However in the archive of the guile-devel ML I found a thread that seems to indicate that guile simply does not support non-greedy regexp, which is perfectly in line with my findings (see below). The thread I'm referring to is found under https://www.mail-archive.com/guile-devel%40gnu.org/msg12022.html Testcase: If non-greedy regexp do work the following two statements should provide the exakt same strings: (match:substring (string-match "_(.*?)_" "a_ä_ö_de_fü_") 1) (match:substring (string-match "_([^_]*)_" "a_ä_ö_de_fü_") 1) However for me they don't. Here is a log how I tested it: $ guile GNU Guile 2.0.11 Copyright (C) 1995-2014 Free Software Foundation, Inc. Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'. This program is free software, and you are welcome to redistribute it under certain conditions; type `,show c' for details. Enter `,help' for help. scheme@(guile-user)> (match:substring (string-match "_(.*?)_" "a_ä_ö_de_fü_") 1) $1 = "ä_ö_de_fü" scheme@(guile-user)> (match:substring (string-match "_([^_]*)_" "a_ä_ö_de_fü_") 1) $2 = "ä" scheme@(guile-user)> ,q For the record: I check the same regexp in Perl where they provide the same result. AFAICT this is either misleading if not an outright documentation bug, or a missing feature in guile. Kind regards, Michael -- Michael Gerdau email: address@hidden GPG-keys available on request or at public keyserver
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