[darcs-users] break line, combine lines, add/delete whitespace as patch primitives?
adam at megacz.com
Wed May 5 06:23:19 UTC 2004
So, obviously the ideal is to use the tree-transform stuff from that
Pierce paper. In the meantime...
We discovered earlier that running emacs' M-q (reflow paragraph) on a
big text file wreaks havoc on darcs; it thinks you changed every line
in the file and spends over two days pegging a 1ghz cpu trying to
Perhaps, like token-replace, there should be four new patch primitives
- split line at character 'n'
- merge line with following line
- insert 'n' chars of whitespace after 'm'th char in line
- delete 'n' chars of whitespace starting with 'm'th char on line
This would be nice for other things too; for example darcs could make
a visible indication when asking you about patches if a patch only
involves line break/merge and whitespace changes... if it's (for
example) C/C++/Java source code (but not Haskell!) I would probably
just okay any such change after barely skimming it.
"Truth is One, though the Sages know it as Many." -- Rig Veda
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