用Vim中的do / end替换匹配的{braces}（Ruby）

Question

Does anyone have a plugin or macro to replace matching { braces } with do and end in Vim? Preferably turning a single-line statement like this:

foo.each { |f| f.whatever }

into:

foo.each do |f|
  f.whatever
end

I could make a macro myself for that one case, but I'd like something that could also handle converting existing multi-line, potentially complicated blocks, like:

foo.each { |f|
  f.bars.each { |b| b.whatever }
  hash = { a: 123, b: 456 }
}

into:

foo.each do |f|
  f.bars.each { |b| b.whatever }
  hash = { a: 123, b: 456 }
end

I've looked at vim-surround and rails.vim , and haven't found a way with either.

Answer 1

There is a Vim plugin called Vim Blockle that performs this function.

Once you install the plugin you put the cursor on the { } do or end and press <Leader>b to swap the block styles.

Answer 2

I assume that in your multi-line example, the output would be :

foo.each do |f|
  f.bars.each do |b| b.whatever end
  hash = { a: 123, b: 456 }
end

that is, the f.bars.each{...} should be replaced too.

if it is the goal, try this:

gg/each\s*{<enter>qqf{%send<esc><c-o>sdo<esc>nq200@q

short explanation:

gg               " move cursor to top
/each\s*{<enter> " search pattern we want
qq               " start recording macro to register q
f{               " move to {
%send<esc>       " move to closing {, and change it to "end", back to normal
<c-o>sdo         " back to beginning { and change it into "do"
<esc>nq          " back to normal, and go to next match, stop recording

then you could do for example 200@q and check the result.