Enable enablewarnings() for MSC

src/tools/msc.lua

@@ -363,10 +363,14 @@
 	function msc.getwarnings(cfg)
 		local result = {}
 
-		-- NOTE: VStudio can't enable specific warnings (workaround?)
+		for _, enable in ipairs(cfg.enablewarnings) do
+			table.insert(result, '/w1"' .. enable .. '"')
+		end
+
 		for _, disable in ipairs(cfg.disablewarnings) do
 			table.insert(result, '/wd"' .. disable .. '"')
 		end
+
 		for _, fatal in ipairs(cfg.fatalwarnings) do
 			table.insert(result, '/we"' .. fatal .. '"')
 		end

tests/tools/test_msc.lua

@@ -235,7 +235,7 @@
 		disablewarnings { "disable" }
 		fatalwarnings { "fatal" }
 		prepare()
-		test.contains({ '/wd"disable"', '/we"fatal"' }, msc.getcflags(cfg))
+		test.contains({ '/w1"enable"', '/wd"disable"', '/we"fatal"' }, msc.getcflags(cfg))
 	end
 
 	function suite.ldflags_OnFatalWarnings()