From: daniel@...42.com Date: 2020-09-25T01:54:40+00:00 Subject: [ruby-core:100116] [Ruby master Bug#17184] No stdlib function to perform simple string replacement Issue #17184 has been updated by Dan0042 (Daniel DeLorme). > I think we should remove special treatment of `\+`, etc in the replacement string for `sub/gsub(String, String)`. > There is no Regexp involved, so I think there is no reason to have those Regexp backreferences. I agree that would be the sensible behavior, but I'm not sure the incompatibility is worth it. Imagine you try `"foo".gsub("o", '\+')` expecting to get `f\+\+` as a result. Instead you get just `f`, and after a lot of searching and debugging you end up with `"foo".gsub("o", '\\\\+')` which produces the correct result. If we were to change the behavior, the result will change to `f\\+\\+`. I'm sure there's a lot of ruby code out there that use a replacement string with a ton of backslashes to avoid this issue. Breaking all that code is not a good idea imho. ---------------------------------------- Bug #17184: No stdlib function to perform simple string replacement https://bugs.ruby-lang.org/issues/17184#change-87684 * Author: sheerun (Adam Stankiewicz) * Status: Open * Priority: Normal * ruby -v: ruby 2.5.5p157 (2019-03-15 revision 67260) [x86_64-darwin19] * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN ---------------------------------------- I have following simple `build.rb`: ```rb template = File.read('template.vim') script = File.read('script.vim') File.write('app.vim', template.gsub("SCRIPT", script)) ``` And then following `template.vim`: ```vim " some header SCRIPT ``` Plus following `script.vim`: ```vim if g:something =~ "\s\+" echo 'g:something is empty' endif ``` I'd expect that the script above produces `app.vim` with following contents: ```vim " some header if g:something =~ "\s\+" echo 'g:something is empty' endif ``` Unfortunately it produces following: ```vim " some header if g:something =~ "\s" echo 'g:something is empty' endif ``` It's probably because gsub interprets `\+` in script as back-reference. I tried to find replacement function in ruby that just replaces one string with something else, without interpreting replacement in any way, but surprisingly I haven't found any.. Am I mistaken? -- https://bugs.ruby-lang.org/ Unsubscribe: