From f2ef4cedecf554c0c9f0694f93df1d53a57bf70c Mon Sep 17 00:00:00 2001
From: Adam Stankiewicz <sheerun@sher.pl>
Date: Tue, 1 Sep 2020 23:02:36 +0200
Subject: Fix reason filetype detection, closes #532

---
 autoload/polyglot.vim | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'autoload')

diff --git a/autoload/polyglot.vim b/autoload/polyglot.vim
index 7d5aa867..3753dc8e 100644
--- a/autoload/polyglot.vim
+++ b/autoload/polyglot.vim
@@ -202,6 +202,16 @@ func! polyglot#DetectFsFiletype()
   setf forth | return
 endfunc
 
+func! polyglot#DetectReFiletype()
+  for lnum in range(1, min([line("$"), 50]))
+    let line = getline(lnum)
+    if line =~# '^\s*#\%(\%(if\|ifdef\|define\|pragma\)\s\+\w\|\s*include\s\+[<"]\|template\s*<\)'
+      setf cpp | return
+    endif
+    setf reason | return
+  endfor
+endfunc
+
 " Restore 'cpoptions'
 let &cpo = s:cpo_save
 unlet s:cpo_save
-- 
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