# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1561491905 -7200
# Node ID 93cb37b45636cac8f1636d012f907841e2616e61
# Parent  3e79aa490556c6590aa9811d57f0df9787e2204e
patch 8.1.1593: filetype not detected for C++ header files without extension

commit https://github.com/vim/vim/commit/6a7af8e2dbcb768a768831d9e6355c855c215ebc
Author: Bram Moolenaar <Bram@vim.org>
Date:   Tue Jun 25 21:34:26 2019 +0200

    patch 8.1.1593: filetype not detected for C++ header files without extension

    Problem:    Filetype not detected for C++ header files without extension.
    Solution:   Recognize the file by the Emacs file mode. (Dmitry Ilyin,
                closes #4593)

diff --git a/runtime/scripts.vim b/runtime/scripts.vim
--- a/runtime/scripts.vim
+++ b/runtime/scripts.vim
@@ -195,7 +195,7 @@ else
   if s:line1 =~# '^:$'
     call dist#ft#SetFileTypeSH(s:line1)	" defined in filetype.vim
 
-    " Z shell scripts
+  " Z shell scripts
   elseif s:line1 =~# '^#compdef\>' || s:line1 =~# '^#autoload\>' ||
         \ "\n".s:line1."\n".s:line2."\n".s:line3."\n".s:line4."\n".s:line5 =~# '\n\s*emulate\s\+\%(-[LR]\s\+\)\=[ckz]\=sh\>'
     set ft=zsh
@@ -204,15 +204,20 @@ else
   elseif s:line1 =~# '^From \([a-zA-Z][a-zA-Z_0-9\.=-]*\(@[^ ]*\)\=\|-\) .* \(19\|20\)\d\d$'
     set ft=mail
 
-    " Mason
+  " Mason
   elseif s:line1 =~# '^<[%&].*>'
     set ft=mason
 
-    " Vim scripts (must have '" vim' as the first line to trigger this)
+  " Vim scripts (must have '" vim' as the first line to trigger this)
   elseif s:line1 =~# '^" *[vV]im$'
     set ft=vim
 
-    " MOO
+  " libcxx and libstdc++ standard library headers like "iostream" do not have
+  " an extension, recognize the Emacs file mode.
+  elseif s:line1 =~? '-\*-.*C++.*-\*-'
+    set ft=cpp
+
+  " MOO
   elseif s:line1 =~# '^\*\* LambdaMOO Database, Format Version \%([1-3]\>\)\@!\d\+ \*\*$'
     set ft=moo
 
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -586,6 +586,8 @@ let s:script_checks = {
       \ 'cfengine': [['#!/path/cfengine']],
       \ 'erlang': [['#!/path/escript']],
       \ 'haskell': [['#!/path/haskell']],
+      \ 'cpp': [['// Standard iostream objects -*- C++ -*-'],
+      \         ['// -*- C++ -*-']],
       \ }
 
 func Test_script_detection()
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1593,
+/**/
     1592,
 /**/
     1591,