This should fix an issue where VS2008 and earlier got the proper CompileAs property

on individual files, but VS2010 and newer did not. This introduces the two new
overridable functions

1. premake.vstudio.vc2010.individualSourceFile
2. premake.vstudio.vc200x.individualSourceFile

These can also be used as sentinel for this particular patch to decide if you
need to patch via your premake4.lua or not.

The patch to premake4.lua shows how older premake4 versions can be taught to
behave like this patched version without having the patched version ... just by
modifying the premake4.lua. Beautiful demo of the power of Lua inside Premake4.

--HG--
branch : WDS-build

1 files changed, 16 insertions, 9 deletions

diff --git a/src/actions/vstudio/vs2010_vcxproj.lua b/src/actions/vstudio/vs2010_vcxproj.lua
index d77ad21..5b9958c 100644
--- a/src/actions/vstudio/vs2010_vcxproj.lua
+++ b/src/actions/vstudio/vs2010_vcxproj.lua
@@ -526,6 +526,21 @@
 		end
 	end
 
+	function vc2010.individualSourceFile(prj, config_mappings, file)
+		local configs = prj.solution.vstudio_configs
+		local translatedpath = path.translate(file.name, "\\")
+		_p(2,'<ClCompile Include=\"%s\">', translatedpath)
+		for _, cfginfo in ipairs(configs) do
+			if config_mappings[cfginfo] and translatedpath == config_mappings[cfginfo] then
+				_p(3,'<PrecompiledHeader '.. if_config_and_platform() .. '>Create</PrecompiledHeader>', premake.esc(cfginfo.name))
+				config_mappings[cfginfo] = nil  --only one source file per pch
+			end
+		end
+		if path.iscfile(file.name) ~= premake.project.iscproject(prj) then
+			_p(3,'<CompileAs>%s</CompileAs>', iif(path.iscfile(file.name), 'CompileAsC', 'CompileAsCpp'))
+		end
+		_p(2,'</ClCompile>')
+	end
 
 	function vc2010.compilerfilesgroup(prj)
 		local configs = prj.solution.vstudio_configs
@@ -541,15 +556,7 @@
 
 			_p(1,'<ItemGroup>')
 			for _, file in ipairs(files) do
-				local translatedpath = path.translate(file.name, "\\")
-				_p(2,'<ClCompile Include=\"%s\">', translatedpath)
-				for _, cfginfo in ipairs(configs) do
-					if config_mappings[cfginfo] and translatedpath == config_mappings[cfginfo] then
-						_p(3,'<PrecompiledHeader '.. if_config_and_platform() .. '>Create</PrecompiledHeader>', premake.esc(cfginfo.name))
-						config_mappings[cfginfo] = nil  --only one source file per pch
-					end
-				end
-				_p(2,'</ClCompile>')
+				vc2010.individualSourceFile(prj, config_mappings, file)
 			end
 			_p(1,'</ItemGroup>')
 		end