Mercurial > vim
view runtime/macros/urm/README.txt @ 30186:d9768ddc26fd v9.0.0429
patch 9.0.0429: not all keys are tested for the MS-Windows GUI
Commit: https://github.com/vim/vim/commit/0adae2da17598669e442ba38547ab18a6c1406de
Author: Yegappan Lakshmanan <yegappan@yahoo.com>
Date: Fri Sep 9 17:39:02 2022 +0100
patch 9.0.0429: not all keys are tested for the MS-Windows GUI
Problem: Not all keys are tested for the MS-Windows GUI.
Solution: Add more key codes to the list. (Yegappan Lakshmanan,
closes #11097)
author | Bram Moolenaar <Bram@vim.org> |
---|---|
date | Fri, 09 Sep 2022 18:45:03 +0200 |
parents | 3fc0f57ecb91 |
children | d6dde6229b36 |
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This is another proof that Vim is perfectly compatible with Vi. The URM macro package was written by Rudolf Koenig ("Rudi") (rudolf@koeniglich.de) for hpux-vi in August 1991. Getting started: type in your shell: vim urm<RETURN> in vim: :so urm.vim<RETURN> in vim: * (to load the registers and boot the URM-machine :-) in vim: g (for 'go') and watch the fun. Per default, 3 and 4 are multiplied. Watch the Program counter, it is visible as a komma moving around. This is a "standard URM" (Universal register machine) interpreter. The URM concept is used in theoretical computer science to aid in theorem proving. Here it proves that vim is a general problem solver (if you bring enough patience). The interpreter begins with register 1 (not 0), without macros and more-lines capability. A dot marks the end of a program. (Bug: there must be a space after the dot.) The registers are the first few lines, beginning with a '>' . The program is the first line after the registers. You should always initialize the registers required by the program. Output register: line 2 Input registers: line 2 to ... Commands: a<n> increment register <n> s<n> decrement register <n> <x>;<y> execute command <x> and then <y> (<x>)<n> execute command <x> while register <n> is nonzero . ("dot blank") halt the machine. Examples: Add register 2 to register 3: (a2;s3)3. Multiply register 2 with register 3: (a4;a5;s2)2; ((a2;s4)4; s3; (a1;a4;s5)5; (a5;s1)1)3. There are more (complicated) examples in the file examples. Note, undo may take a while after a division.