Find-replace-regexp with elisp replacement not working correctly

Question

I have a string in a buffer "THIS_IS_A_TEST" (the quotes are part of the string).

I want to turn this in to "ThisIsATest". I'm attempting to do this using a query-replace-regexp where I substitute \(\w+\)_? with \,(capitalize \1). However, the upcased words are not being capitalized.

Running M-c (capitalize-word) on any of those words works fine, and if my test string is changed to "this_is_a_test", then I get the desired result ("ThisIsATest").

What's going wrong? Is this a bug in capitalize?

(Note that this still happens without an init file loaded)

legoscia · Accepted Answer · 2013-11-04 15:16:50Z

2

It works for me if I set case-replace to nil. I'm not sure why this doesn't do the same thing for the lower case string, though...

answered Nov 4, 2013 at 15:16

legoscia

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4 Comments

Drew Over a year ago

For me it works fine for both (lowercase and uppercase tests). Note, however, that there are two variables that govern the behavior here: case-replace and case-fold-search.

Squidly Over a year ago

I haven't modified either case-replace or case-fold-search but I would not expect (capitalize "FOO") to have different semantics depending on whether I'm using it in a search or not. If this is the 'expected' behaviour, rather than my misuse of it (somehow), then I propose that this is a bug.

phils Over a year ago

MrBones: Note that capitalize isn't doing anything unexpected (if you type ? for help during the replacement query, it will show you that the call to capitalize returned the expected value). The behaviour here is a question of what Emacs does when the replacement word is identical, save for case, to the original (or a case-modified original); and the variables mentioned control that behaviour.

Squidly Over a year ago

So capitalize is doing capitalizing, but case-replace combined with case-fold-search is undoing it? IMO, that's a bug

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