vstudio: add usestandardpreprocessor option

modules/vstudio/_preload.lua

@@ -175,6 +175,16 @@
 		kind = "boolean"
 	}
 
+	p.api.register {
+		name = "usestandardpreprocessor",
+		scope = "config",
+		kind = "string",
+		allowed = {
+			"On",
+			"Off"
+		}
+	}
+
 
 --
 -- Decide when the full module should be loaded.

modules/vstudio/tests/vc2019/test_compile_settings.lua

@@ -106,3 +106,27 @@
 	<ScanSourceForModuleDependencies>false</ScanSourceForModuleDependencies>
 		]]
 	end
+
+	function suite.UseStandardPreprocessorOn()
+		usestandardpreprocessor 'On'
+		prepare()
+		test.capture [[
+<ClCompile>
+	<PrecompiledHeader>NotUsing</PrecompiledHeader>
+	<WarningLevel>Level3</WarningLevel>
+	<Optimization>Disabled</Optimization>
+	<UseStandardPreprocessor>true</UseStandardPreprocessor>
+		]]
+	end
+
+	function suite.UseStandardPreprocessorOff()
+		usestandardpreprocessor 'Off'
+		prepare()
+		test.capture [[
+<ClCompile>
+	<PrecompiledHeader>NotUsing</PrecompiledHeader>
+	<WarningLevel>Level3</WarningLevel>
+	<Optimization>Disabled</Optimization>
+	<UseStandardPreprocessor>false</UseStandardPreprocessor>
+		]]
+	end

modules/vstudio/vs2010_vcxproj.lua

@@ -400,6 +400,7 @@
 			m.externalWarningLevel,
 			m.externalAngleBrackets,
 			m.scanSourceForModuleDependencies,
+			m.useStandardPreprocessor,
 		}
 
 		if cfg.kind == p.STATICLIB then
@@ -2955,6 +2956,16 @@
 		end
 	end
 
+	function m.useStandardPreprocessor(cfg)
+		if _ACTION >= "vs2019" and cfg.usestandardpreprocessor ~= nil then
+			if cfg.usestandardpreprocessor == 'On' then
+				m.element("UseStandardPreprocessor", nil, "true")
+			else
+				m.element("UseStandardPreprocessor", nil, "false")
+			end
+		end
+	end
+
 
 	function m.xmlDeclaration()
 		p.xmlUtf8()

src/tools/msc.lua

@@ -134,6 +134,10 @@
 		openmp = {
 			On = "/openmp",
 			Off = "/openmp-"
+		},
+		usestandardpreprocessor = {
+			On = "/Zc:preprocessor",
+			Off = "/Zc:preprocessor-"
 		}
 
 	}

website/docs/usestandardpreprocessor.md

@@ -0,0 +1,26 @@
+Enables a token-based preprocessor conforming to C99, C++11, and later standards.
+
+```lua
+usestandardpreprocessor 'value'
+```
+
+### Parameters ###
+
+`value` is one of:
+
+| Action      | Description                           |
+|-------------|---------------------------------------|
+| Off         | Do not use the conforming processor.  |
+| On          | Enable the conforming processor.      |
+
+### Applies To ###
+
+Visual Studio 2019 or later.
+
+### Availability ###
+
+Premake 5.0 or later.
+
+### See Also ###
+
+ * [Microsoft's documentation](https://docs.microsoft.com/en-us/cpp/build/reference/zc-preprocessor)

website/sidebars.js

@@ -277,6 +277,7 @@ module.exports = {
 						'undefines',
 						'unsignedchar',
 						'usefullpaths',
+						'usestandardpreprocessor',
 						'usingdirs',
 						'uuid',
 						'vectorextensions',