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Try-catch erroneous E121 message from redir => #41

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Jun 24, 2022
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Try-catch erroneous E121 message from redir => #41

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40 changes: 25 additions & 15 deletions autoload/markbar/helpers.vim
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Original file line number Diff line number Diff line change
@@ -1,18 +1,30 @@
" We always redir => l:redir_output to prevent superfluous `E121: Undefined
" variable` messages when (neo)vim tries to look up a local variable from a
" previous stack frame's `redir =>` invocation.
" RETURNS: (v:t_string) Output of executing the given command.
" DETAILS: We wrap the redir in try-catch to catch erroneous `E121:
" Undefined variable` messages that appear when (neo)vim tries to
" look up a local variable from a previous stack frame's `redir =>`
" invocation.
"
" See: https://github.com/Yilin-Yang/vim-markbar/issues/33
" See: https://github.com/Yilin-Yang/vim-markbar/issues/33
function! markbar#helpers#Redir(command) abort
let l:redir_output = ''
try
redir => l:redir_output
execute a:command
redir end
catch /E121/
redir => l:redir_output
execute a:command
redir end
endtry
return l:redir_output
endfunction


" RETURNS: (v:t_list) A list populated with the numbers of every
" buffer, listed or unlisted.
function! markbar#helpers#GetOpenBuffers() abort
let l:redir_output = ''
redir => l:redir_output
silent ls!
redir end
let l:buffers_str_list = split(l:redir_output, '\r\{0,1}\n')
let l:buffers_str = markbar#helpers#Redir('silent ls!')
let l:buffers_str_list = split(l:buffers_str, '\r\{0,1}\n')
let l:buffers_list = []
for l:str in l:buffers_str_list
call add(l:buffers_list, matchstr(l:str, '[0-9]\+') + 0)
Expand Down Expand Up @@ -57,9 +69,8 @@ endfunction
function! markbar#helpers#GetLocalMarks() abort
let l:redir_output = ''
try
redir => l:redir_output
silent marks abcdefghijklmnopqrstuvwxyz[]<>'`\"^.(){}
redir end
let l:redir_output = markbar#helpers#Redir(
\ "silent marks abcdefghijklmnopqrstuvwxyz[]<>'`\\\"^.(){}")
let l:redir_output .= "\n"
catch /E283/
let l:redir_output = 'mark line col file/text\n'
Expand All @@ -77,9 +88,8 @@ endfunction
function! markbar#helpers#GetGlobalMarks() abort
let l:redir_output = ''
try
redir => l:redir_output
silent marks ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
redir end
let l:redir_output = markbar#helpers#Redir(
\ 'silent marks ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789')
catch /E283/
let l:redir_output = 'mark line col file/text\n'
endtry
Expand Down