commit https://github.com/vim/vim/commit/7fed5c18f8577b75404b80d8b9a9907b1bbd27e4 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Mar 29 23:10:31 2016 +0200 patch 7.4.1685 Problem: There is no easy way to get all the information about a match. Solution: Add matchstrpos(). (Ozaki Kiichi)

Tests for complicated + argument to :edit command

STARTTEST
:$-1w! Xfile1
:$w! Xfile2
:edit +1|s/|/PIPE/|w Xfile1| e Xfile2|1 | s/\//SLASH/|w
:w! test.out
:e Xfile1
:w >> test.out
:qa!
ENDTEST

The result should be in Xfile1: "fooPIPEbar", in Xfile2: "fooSLASHbar"
foo|bar
foo/bar