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" Split a string with a split character that can be escaped with another,
" e.g. &runtimepath with commas and backslashes respectively
function! vimrc#SplitEscaped(str, ...) abort
" Arguments to function
let str = a:str " String to split
let sep = a:0 >= 1 ? a:1 : ',' " Optional split char, default comma
let esc = a:0 >= 2 ? a:2 : '\' " Optional escape char, default backslash
" Get length of string, return empty list if it's zero
let len = strlen(str)
if !len
return []
endif
" Collect items into list by iterating characterwise
let list = [''] " List items
let idx = 0 " Offset in string
while idx < len
if str[idx] ==# sep
" This character is the item separator, and it wasn't escaped; start a
" new list item
call add(list, '')
else
" This character is the escape character, so we'll skip to the next
" character, if any, and add that; testing suggests that a terminal
" escape character on its own shouldn't be added
if str[idx] ==# esc
let idx += 1
endif
let list[-1] .= str[idx]
endif
" Bump index for next character
let idx += 1
endwhile
" Return the completed list
return list
endfunction
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