Add support for ImplicitUsings in dotnetbase

Author: CapeGuyBen

modules/vstudio/_preload.lua

@@ -158,6 +158,17 @@
 		default = false
 	}
 
+	p.api.register {
+		name = "enableimplicitusings",
+		scope = "config",
+		kind = "string",
+		allowed = {
+			"Default",
+			"On",
+			"Off"
+		}
+	}
+
 	p.api.register {
 		name = "externalanglebrackets",
 		scope = "config",

modules/vstudio/tests/cs2005/test_netcore.lua

@@ -138,6 +138,40 @@ function suite.allowUnsafeProperty_core()
     ]]
 end
 
+function suite.implicitUsings_on()
+    p.action.set("vs2022")
+    dotnetframework "net10.0"
+    enableimplicitusings "On"
+    prepareProjectProperties()
+    test.capture [[
+	<PropertyGroup>
+		<OutputType>Exe</OutputType>
+		<AppDesignerFolder>Properties</AppDesignerFolder>
+		<TargetFramework>net10.0</TargetFramework>
+		<Configurations>Debug;Release;Distribution</Configurations>
+		<EnableDefaultCompileItems>false</EnableDefaultCompileItems>
+		<ImplicitUsings>true</ImplicitUsings>
+	</PropertyGroup>
+    ]]
+end
+
+function suite.implicitUsings_off()
+    p.action.set("vs2022")
+    dotnetframework "net10.0"
+    enableimplicitusings "Off"
+    prepareProjectProperties()
+    test.capture [[
+	<PropertyGroup>
+		<OutputType>Exe</OutputType>
+		<AppDesignerFolder>Properties</AppDesignerFolder>
+		<TargetFramework>net10.0</TargetFramework>
+		<Configurations>Debug;Release;Distribution</Configurations>
+		<EnableDefaultCompileItems>false</EnableDefaultCompileItems>
+		<ImplicitUsings>false</ImplicitUsings>
+	</PropertyGroup>
+    ]]
+end
+
 function suite.project_element_configurations()
 	p.action.set("vs2022")
 	dotnetframework "net8.0"

modules/vstudio/vs2005_csproj.lua

@@ -54,6 +54,7 @@
 				dotnetbase.csversion,
 				dotnetbase.projectConfigurations,
 				dotnetbase.netcore.enableDefaultCompileItems,
+				dotnetbase.netcore.enableImplicitUsings,
 				dotnetbase.netcore.dotnetsdk
 			}
 		else

modules/vstudio/vs2005_dotnetbase.lua

@@ -817,6 +817,19 @@
 		_p(2,'<EnableDefaultCompileItems>%s</EnableDefaultCompileItems>', iif(cfg.enableDefaultCompileItems, "true", "false"))
 	end
 
+	function dotnetbase.netcore.enableImplicitUsings(cfg)
+		local types = {
+			Off = "false",
+			On = "true"
+		}
+
+		if _ACTION >= "vs2022" and
+			dotnetbase.isNewFormatProject(cfg) and
+			types[cfg.enableImplicitUsings] then
+			_p(2,'<ImplicitUsings>%s</ImplicitUsings>', types[cfg.enableImplicitUsings])
+		end
+	end
+
 	function dotnetbase.netcore.useWpf(cfg)
 		if cfg.wpf == p.ON then
 			_p(2,'<UseWpf>true</UseWpf>')

tests/test.sh

@@ -0,0 +1,5 @@
+script_dir=`dirname -- "$0"`
+echo $script_dir
+pushd "$script_dir"
+../bin/debug/premake5 /scripts=.. /file=../premake5.lua "$@" test
+popd

website/docs/enableimplicitusings.md

@@ -0,0 +1,29 @@
+Specifies if C# implicit usings should be enabled. Defaults to `Off`.
+
+```lua
+enableimplicitusings ("value")
+```
+
+### Parameters ###
+
+`value` is one of:
+
+| Value   | Description |
+|---------|-------------|
+| Default | Don't include property for implicit usings |
+| On      | Enable C# implicit usings. |
+| Off     | Disable C# implicit usings. |
+
+## Applies To ###
+
+Project configurations.
+
+### Availability ###
+
+Premake 5.0.0 or later for Visual Studio C# Projects.
+
+### Examples ###
+
+```lua
+enableimplicitusings "On"
+```

website/sidebars.js

@@ -133,6 +133,7 @@ module.exports = {
 						'embedandsign',
 						'enable64bitchecks',
 						'enabledefaultcompileitems',
+						'enableimplicitusings',
 						'enablemodules',
 						'enablepch',
 						'enableunitybuild',