emacs - 多词缩写展开

Question

我发现了这个关于多词缩写的邮件列表消息，但仍然无法扩展工作。

我定义了这两个缩写：

"agw"          0    "a great whale"
"a g w"         0    "a great whale"

在“agw”之后按空格有效，但不是“ag w”。但是，如果我调用 (abbrev-expansion "a g w")，则返回正确的扩展。

问题是如何让 Emacs 向后搜索超出一个单词边界？

是的，yasnippet 存在并且我使用它，但是缩写更加无缝（例如，“1/2”之后的按空格将其变成 unicode 一半）。我也不想更改语法表。

Answer 1

SPACE，在插入自身之前，会在点之前寻找一个缩写来展开。它使用'backward-word'，它将在前一个空格处停止。因此 SPACE 不能扩展缩写内的空格。

Answer 2

As explained by Andreas, it does not work because by default abbrevs only work if they are made up of chars that are "word constituent" and " " is not a word constituent. You can change this rule, tho, for a given table, with something like (abbrev-table-put <table> :regexp <regexp>) where a regexp like "\\<\\(\\w+:?\\)\\W*" would pretty much reproduce the default behavior.

Now for your case, you want a regexp that will match "a g w" and "agw" but note that it shouldn't match the "agw" of "dawg" and neither should it match "a g agw", which makes it a bit tricky. One way to do that is to define your regexp as (concat "\\<" (regexp-opt '("agw" "a g w")) "\\W*"), which is fairly simple to do but has the downside that it requires changing the regexp any time you add an abbrev.