3 files changed, 38 insertions, 8 deletions
diff --git a/scripts/build b/scripts/build
index f688c28f..67f01ca3 100755
--- a/scripts/build
+++ b/scripts/build
@@ -268,10 +268,6 @@ def rule_to_code(rule)
     end
   end
 
-  if rule.has_key?("rules")
-    return rule["rules"].map { |r| indent(rule_to_code(r), 0) }.join("\n")
-  end
-
   if rule.has_key?("pattern") || rule.has_key?("or") || rule.has_key?("and")
     return <<~EOS
       if #{pattern_to_condition(rule)}
@@ -280,6 +276,10 @@ def rule_to_code(rule)
     EOS
   end
 
+  if rule.has_key?("rules")
+    return rule["rules"].map { |r| indent(rule_to_code(r), 0) }.join("\n")
+  end
+
   if rule.has_key?("if_set")
     return <<~EOS
       if #{rule["negative"] ? "!" : ""}#{rule["if_set"]}
@@ -288,6 +288,14 @@ def rule_to_code(rule)
     EOS
   end
 
+  if rule.has_key?("if_exists")
+    return <<~EOS
+      if #{rule["negative"] ? "!" : ""}exists("#{rule["if_exists"]}")
+      #{indent(rule_to_code(except(rule, "if_exists", "negative")), 2)}
+      endif
+    EOS
+  end
+
   if rule.has_key?("set")
     return <<~EOS
       let #{rule["set"]} = 1
@@ -455,7 +463,7 @@ def generate_ftdetect(packages, heuristics)
       extensions = filetype["extensions"]
       filenames = filetype["filenames"]
 
-      expected_extensions = all_filetypes.has_key?(name) ? all_filetypes.fetch(name)[:extensions] : []
+      expected_extensions = (all_filetypes.has_key?(name) ? all_filetypes.fetch(name)[:extensions] : []).map(&:downcase)
       ignored_extensions = expand_all(filetype.fetch("ignored_extensions", []))
       ignored_warnings = expand_all(filetype.fetch("ignored_warnings", []))
 
diff --git a/scripts/test_extensions.vim b/scripts/test_extensions.vim
index 9cac0b21..f2aaf66c 100644
--- a/scripts/test_extensions.vim
+++ b/scripts/test_extensions.vim
@@ -181,6 +181,18 @@ call TestExtension("ave", "foobar.ave", "")
 " Awk
 call TestExtension("awk", "foobar.awk", "")
 
+" C++
+call TestExtension("c", "foobar.c", "")
+call TestExtension("cpp", "foobar.cxx", "")
+call TestExtension("cpp", "foobar.c++", "")
+call TestExtension("cpp", "foobar.hh", "")
+call TestExtension("cpp", "foobar.hxx", "")
+call TestExtension("cpp", "foobar.hpp", "")
+call TestExtension("cpp", "foobar.ipp", "")
+call TestExtension("cpp", "foobar.moc", "")
+call TestExtension("cpp", "foobar.tcc", "")
+call TestExtension("cpp", "foobar.inl", "")
+
 " vim-polyglot only
 call TestExtension("blade", "test.blade.php", "")
 call TestExtension("yaml.ansible", "playbook.yml", "")
@@ -233,7 +245,7 @@ call TestExtension("vb", "vb.dsm", "")
 call TestExtension("vb", "vb.dsm", "")
 call TestExtension("vb", "vb.ctl", "")
 
-" Idris
+" .idr extension
 call TestExtension("idris", "lowercase.idr", "--idris1")
 call TestExtension("idris", "uppercase.idr", "--Idris1")
 call TestExtension("idris", "start-space-l.idr", "-- idris1")
@@ -253,7 +265,17 @@ call TestExtension("idris2", "two-spaces-u.idr", "-- Idris 2")
 call TestExtension("idris2", "mypkg.ipkg", "package mypkg\n\ndepends = effects")
 call TestExtension("idris2", "use-post-proj.idr", "%language PostfixProjections")
 
-" Literate Idris
+" .lidr extension
 call TestExtension("lidris", "lidris-1.lidr", "Some test plaintext\n\n> --idris1\n> myfact : Nat -> Nat\n> myfact Z = 1\n> myfact (S k) = (S k) * myfact k\n\nMore plaintext")
 call TestExtension("lidris2", "lidris-2.lidr", "Some test plaintext\n\n> --idris2\n> myfact : Nat -> Nat\n> myfact Z = 1\n> myfact (S k) = (S k) * myfact k\n\nMore plaintext")
 
+
+" .h extension
+call TestExtension("objcpp", "foo.h", "@interface MTNavigationController : UINavigationController")
+call TestExtension("cpp", "foo.h", "")
+let g:c_syntax_for_h = 1
+call TestExtension("objc", "foo.h", "@interface MTNavigationController : UINavigationController")
+call TestExtension("c", "foo.h", "")
+unlet g:c_syntax_for_h
+let g:ch_syntax_for_h = 1
+call TestExtension("ch", "foo.h", "")
diff --git a/scripts/test_filetypes.vim b/scripts/test_filetypes.vim
index e157889d..42e683d1 100644
--- a/scripts/test_filetypes.vim
+++ b/scripts/test_filetypes.vim
@@ -45,8 +45,8 @@ call TestFiletype('autoit')
 call TestFiletype('ave')
 call TestFiletype('awk')
 call TestFiletype('reason')
-call TestFiletype('c')
 call TestFiletype('cpp')
+call TestFiletype('c')
 call TestFiletype('caddyfile')
 call TestFiletype('carp')
 call TestFiletype('clojure')