--
-- vs2010_vcxproj.lua
-- Generate a Visual Studio 201x C/C++ project.
-- Copyright (c) Jason Perkins and the Premake project
--

	local p = premake
	p.vstudio.vc2010 = {}

	local vstudio = p.vstudio
	local project = p.project
	local config = p.config
	local fileconfig = p.fileconfig
	local tree = p.tree

	local m = p.vstudio.vc2010


---
-- Add namespace for element definition lists for p.callArray()
---

	m.elements = {}
	m.conditionalElements = {}

--
-- Generate a Visual Studio 201x C++ project, with support for the new platforms API.
--

	m.elements.project = function(prj)
		return {
			m.xmlDeclaration,
			m.project,
			m.projectConfigurations,
			m.globals,
			m.importDefaultProps,
			m.configurationPropertiesGroup,
			m.importLanguageSettings,
			m.importExtensionSettings,
			m.propertySheetGroup,
			m.userMacros,
			m.outputPropertiesGroup,
			m.itemDefinitionGroups,
			m.assemblyReferences,
			m.files,
			m.projectReferences,
			m.importLanguageTargets,
			m.importExtensionTargets,
			m.ensureNuGetPackageBuildImports,
		}
	end

	function m.generate(prj)
		p.utf8()
		p.callArray(m.elements.project, prj)
		p.out('</Project>')
	end


--
-- Output the XML declaration and opening <Project> tag.
--

	function m.project(prj)
		local action = p.action.current()
		if _ACTION >= "vs2019" then
			p.push('<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">')
		else
			p.push('<Project DefaultTargets="Build" ToolsVersion="%s" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">',
				   action.vstudio.toolsVersion)
		end
	end


--
-- Write out the list of project configurations, which pairs build
-- configurations with architectures.
--

	function m.projectConfigurations(prj)

		-- build a list of all architectures used in this project
		local platforms = {}
		for cfg in project.eachconfig(prj) do
			local arch = vstudio.archFromConfig(cfg, true)
			if not table.contains(platforms, arch) then
				table.insert(platforms, arch)
			end
		end

		local configs = {}
		p.push('<ItemGroup Label="ProjectConfigurations">')
		for cfg in project.eachconfig(prj) do
			for _, arch in ipairs(platforms) do
				local prjcfg = vstudio.projectConfig(cfg, arch)
				if not configs[prjcfg] then
					configs[prjcfg] = prjcfg
					p.push('<ProjectConfiguration Include="%s">', vstudio.projectConfig(cfg, arch))
					p.x('<Configuration>%s</Configuration>', vstudio.projectPlatform(cfg))
					p.w('<Platform>%s</Platform>', arch)
					p.pop('</ProjectConfiguration>')
				end
			end
		end
		p.pop('</ItemGroup>')
	end


--
-- Write out the TargetFrameworkVersion property.
--

	function m.targetFramework(prj)
		local action = p.action.current()
		local tools = string.format(' ToolsVersion="%s"', action.vstudio.toolsVersion)

		local framework = prj.dotnetframework or action.vstudio.targetFramework or "4.0"
		p.w('<TargetFrameworkVersion>v%s</TargetFrameworkVersion>', framework)
	end



--
-- Write out the Globals property group.
--

	m.elements.globals = function(prj)
		return {
			m.projectGuid,
			m.ignoreWarnDuplicateFilename,
			m.keyword,
			m.projectName,
			m.preferredToolArchitecture,
			m.latestTargetPlatformVersion,
			m.windowsTargetPlatformVersion,
		}
	end

	m.elements.globalsCondition = function(prj, cfg)
		return {
			m.windowsTargetPlatformVersion,
			m.xpDeprecationWarning,
		}
	end

	function m.globals(prj)

		-- Write out the project-level globals
		m.propertyGroup(nil, "Globals")
		p.callArray(m.elements.globals, prj)
		p.pop('</PropertyGroup>')

		-- Write out the configurable globals
		for cfg in project.eachconfig(prj) do

			-- Find out whether we're going to actually write a property out
			local captured = p.capture(	function()
										p.push()
										p.callArray(m.elements.globalsCondition, prj, cfg)
										p.pop()
										end)

			-- If we do have something, create the entry, skip otherwise
			if captured ~= '' then
				m.propertyGroup(cfg, "Globals")
				p.callArray(m.elements.globalsCondition, prj, cfg)
				p.pop('</PropertyGroup>')
			end

		end

	end


--
-- Write out the configuration property group: what kind of binary it
-- produces, and some global settings.
--

	m.elements.configurationProperties = function(cfg)
		if cfg.kind == p.UTILITY then
			return {
				m.configurationType,
				m.platformToolset,
			}
		else
			return {
				m.configurationType,
				m.useDebugLibraries,
				m.useOfMfc,
				m.useOfAtl,
				m.clrSupport,
				m.characterSet,
				m.platformToolset,
				m.wholeProgramOptimization,
				m.nmakeOutDirs,
				m.windowsSDKDesktopARMSupport,
			}
		end
	end

	function m.configurationProperties(cfg)
		m.propertyGroup(cfg, "Configuration")
		p.callArray(m.elements.configurationProperties, cfg)
		p.pop('</PropertyGroup>')
	end

	function m.configurationPropertiesGroup(prj)
		for cfg in project.eachconfig(prj) do
			m.configurationProperties(cfg)
		end
	end



--
-- Write the output property group, which includes the output and intermediate
-- directories, manifest, etc.
--

	m.elements.outputProperties = function(cfg)
		if cfg.kind == p.UTILITY then
			return {
				m.outDir,
				m.intDir,
				m.extensionsToDeleteOnClean,
				m.executablePath,
			}
		else
			return {
				m.linkIncremental,
				m.ignoreImportLibrary,
				m.outDir,
				m.intDir,
				m.targetName,
				m.targetExt,
				m.includePath,
				m.libraryPath,
				m.generateManifest,
				m.extensionsToDeleteOnClean,
				m.executablePath,
			}
		end
	end

	function m.outputProperties(cfg)
		if not vstudio.isMakefile(cfg) then
			m.propertyGroup(cfg)
			p.callArray(m.elements.outputProperties, cfg)
			p.pop('</PropertyGroup>')
		end
	end


--
-- Write the NMake property group for Makefile projects, which includes the custom
-- build commands, output file location, etc.
--

	m.elements.nmakeProperties = function(cfg)
		return {
			m.executablePath,
			m.includePath,
			m.libraryPath,
			m.nmakeOutput,
			m.nmakeBuildCommands,
			m.nmakeRebuildCommands,
			m.nmakeCleanCommands,
			m.nmakePreprocessorDefinitions,
			m.nmakeIncludeDirs,
			m.additionalCompileOptions
		}
	end

	function m.nmakeProperties(cfg)
		if vstudio.isMakefile(cfg) then
			m.propertyGroup(cfg)
			p.callArray(m.elements.nmakeProperties, cfg)
			p.pop('</PropertyGroup>')
		end
	end


--
-- Output properties and NMake properties should appear side-by-side
-- for each configuration.
--

	function m.outputPropertiesGroup(prj)
		for cfg in project.eachconfig(prj) do
			m.outputProperties(cfg)
			m.nmakeProperties(cfg)
		end
	end



--
-- Write a configuration's item definition group, which contains all
-- of the per-configuration compile and link settings.
--

	m.elements.itemDefinitionGroup = function(cfg)
		if cfg.kind == p.UTILITY then
			return {
				m.ruleVars,
				m.buildEvents,
				m.buildLog,
			}
		else
			return {
				m.clCompile,
				m.buildStep,
				m.fxCompile,
				m.resourceCompile,
				m.linker,
				m.manifest,
				m.buildEvents,
				m.ruleVars,
				m.buildLog,
			}
		end
	end

	function m.itemDefinitionGroup(cfg)
		if not vstudio.isMakefile(cfg) then
			p.push('<ItemDefinitionGroup %s>', m.condition(cfg))
			p.callArray(m.elements.itemDefinitionGroup, cfg)
			p.pop('</ItemDefinitionGroup>')

		else
			if cfg == project.getfirstconfig(cfg.project) then
				p.w('<ItemDefinitionGroup>')
				p.w('</ItemDefinitionGroup>')
			end
		end
	end

	function m.itemDefinitionGroups(prj)
		for cfg in project.eachconfig(prj) do
			m.itemDefinitionGroup(cfg)
		end
	end



--
-- Write the the <ClCompile> compiler settings block.
--

	m.elements.clCompile = function(cfg)
		local calls = {
			m.precompiledHeader,
			m.warningLevel,
			m.treatWarningAsError,
			m.disableSpecificWarnings,
			m.treatSpecificWarningsAsErrors,
			m.basicRuntimeChecks,
			m.clCompilePreprocessorDefinitions,
			m.clCompileUndefinePreprocessorDefinitions,
			m.clCompileAdditionalIncludeDirectories,
			m.clCompileAdditionalUsingDirectories,
			m.forceIncludes,
			m.debugInformationFormat,
			m.optimization,
			m.functionLevelLinking,
			m.intrinsicFunctions,
			m.justMyCodeDebugging,
			m.minimalRebuild,
			m.omitFramePointers,
			m.stringPooling,
			m.runtimeLibrary,
			m.omitDefaultLib,
			m.exceptionHandling,
			m.runtimeTypeInfo,
			m.bufferSecurityCheck,
			m.treatWChar_tAsBuiltInType,
			m.floatingPointModel,
			m.floatingPointExceptions,
			m.inlineFunctionExpansion,
			m.enableEnhancedInstructionSet,
			m.multiProcessorCompilation,
			m.additionalCompileOptions,
			m.compileAs,
			m.callingConvention,
			m.languageStandard,
			m.conformanceMode,
			m.structMemberAlignment,
			m.useFullPaths,
			m.removeUnreferencedCodeData
		}

		if cfg.kind == p.STATICLIB then
			table.insert(calls, m.programDatabaseFileName)
		end

		return calls
	end

	function m.clCompile(cfg)
		p.push('<ClCompile>')
		p.callArray(m.elements.clCompile, cfg)
		p.pop('</ClCompile>')
	end

--
-- Write the the <CustomBuildStep> compiler settings block.
--

	m.elements.buildStep = function(cfg)
		local calls = {
			m.buildCommands,
			m.buildMessage,
			m.buildOutputs,
			m.buildInputs
		}

		return calls
	end

	function m.buildStep(cfg)
		if #cfg.buildCommands > 0 or #cfg.buildOutputs > 0 or #cfg.buildInputs > 0 or cfg.buildMessage then

			p.push('<CustomBuildStep>')
			p.callArray(m.elements.buildStep, cfg)
			p.pop('</CustomBuildStep>')

		end
	end


--
-- Write the <FxCompile> settings block.
--

	m.elements.fxCompile = function(cfg)
		return {
			m.fxCompilePreprocessorDefinition,
			m.fxCompileAdditionalIncludeDirs,
			m.fxCompileShaderType,
			m.fxCompileShaderModel,
			m.fxCompileShaderEntry,
			m.fxCompileShaderVariableName,
			m.fxCompileShaderHeaderOutput,
			m.fxCompileShaderObjectOutput,
			m.fxCompileShaderAssembler,
			m.fxCompileShaderAssemblerOutput,
			m.fxCompileShaderAdditionalOptions,
		}
	end

	function m.fxCompile(cfg)
		if p.config.hasFile(cfg, path.ishlslfile) then
			local contents = p.capture(function ()
				p.push()
				p.callArray(m.elements.fxCompile, cfg)
				p.pop()
			end)

			if #contents > 0 then
				p.push('<FxCompile>')
				p.outln(contents)
				p.pop('</FxCompile>')
			end
		end
	end


--
-- Write out the resource compiler block.
--

	m.elements.resourceCompile = function(cfg)
		return {
			m.resourcePreprocessorDefinitions,
			m.resourceAdditionalIncludeDirectories,
			m.culture,
		}
	end

	function m.resourceCompile(cfg)
		if p.config.hasFile(cfg, path.isresourcefile) then
			local contents = p.capture(function ()
				p.push()
				p.callArray(m.elements.resourceCompile, cfg)
				p.pop()
			end)

			if #contents > 0 then
				p.push('<ResourceCompile>')
				p.outln(contents)
				p.pop('</ResourceCompile>')
			end
		end
	end


--
-- Write out the linker tool block.
--

	m.elements.linker = function(cfg, explicit)
		return {
			m.link,
			m.lib,
			m.linkLibraryDependencies,
		}
	end

	function m.linker(cfg)
		local explicit = vstudio.needsExplicitLink(cfg)
		p.callArray(m.elements.linker, cfg, explicit)
	end



	m.elements.link = function(cfg, explicit)
		if cfg.kind == p.STATICLIB then
			return {
				m.subSystem,
				m.fullProgramDatabaseFile,
				m.generateDebugInformation,
				m.optimizeReferences,
			}
		else
			return {
				m.subSystem,
				m.fullProgramDatabaseFile,
				m.generateDebugInformation,
				m.optimizeReferences,
				m.additionalDependencies,
				m.additionalLibraryDirectories,
				m.importLibrary,
				m.entryPointSymbol,
				m.generateMapFile,
				m.moduleDefinitionFile,
				m.treatLinkerWarningAsErrors,
				m.ignoreDefaultLibraries,
				m.largeAddressAware,
				m.targetMachine,
				m.additionalLinkOptions,
				m.programDatabaseFile,
				m.assemblyDebug,
			}
		end
	end

	function m.link(cfg, explicit)
		local contents = p.capture(function ()
			p.push()
			p.callArray(m.elements.link, cfg, explicit)
			p.pop()
		end)
		if #contents > 0 then
			p.push('<Link>')
			p.outln(contents)
			p.pop('</Link>')
		end
	end



	m.elements.lib = function(cfg, explicit)
		if cfg.kind == p.STATICLIB then
			return {
				m.additionalDependencies,
				m.additionalLibraryDirectories,
				m.treatLinkerWarningAsErrors,
				m.targetMachine,
				m.additionalLinkOptions,
			}
		else
			return {}
		end
	end

	function m.lib(cfg, explicit)
		local contents = p.capture(function ()
			p.push()
			p.callArray(m.elements.lib, cfg, explicit)
			p.pop()
		end)
		if #contents > 0 then
			p.push('<Lib>')
			p.outln(contents)
			p.pop('</Lib>')
		end
	end



--
-- Write the manifest section.
--

	m.elements.manifest = function(cfg)
		return {
			m.enableDpiAwareness,
			m.additionalManifestFiles,
		}
	end

	function m.manifest(cfg)
		if cfg.kind ~= p.STATICLIB then
			local contents = p.capture(function ()
				p.push()
				p.callArray(m.elements.manifest, cfg)
				p.pop()
			end)
			if #contents > 0 then
				p.push('<Manifest>')
				p.outln(contents)
				p.pop('</Manifest>')
			end
		end
	end



---
-- Write out the pre- and post-build event settings.
---

	function m.buildEvents(cfg)
		local write = function (event)
			local name = event .. "Event"
			local field = event:lower()
			local steps = cfg[field .. "commands"]
			local msg = cfg[field .. "message"]

			if #steps > 0 then
				steps = os.translateCommandsAndPaths(steps, cfg.project.basedir, cfg.project.location)
				p.push('<%s>', name)
				p.x('<Command>%s</Command>', table.implode(steps, "", "", "\r\n"))
				if msg then
					p.x('<Message>%s</Message>', msg)
				end
				p.pop('</%s>', name)
			end
		end

		write("PreBuild")
		write("PreLink")
		write("PostBuild")
	end



---
-- Transform property to string
---

	function m.getRulePropertyString(rule, prop, value, kind)
		-- list of paths
		if kind == "list:path" then
			return table.concat(vstudio.path(cfg, value), ';')
		end

		-- path
		if kind == "path" then
			return vstudio.path(cfg, value)
		end

		-- list
		if type(value) == "table" then
			return table.concat(value, ";")
		end

		-- enum
		if prop.values then
			value = table.findKeyByValue(prop.values, value)
		end

		-- primitive
		return tostring(value)
	end



---
-- Write out project-level custom rule variables.
---

	function m.ruleVars(cfg)
		for i = 1, #cfg.rules do
			local rule = p.global.getRule(cfg.rules[i])

			local contents = p.capture(function ()
				p.push()
				for prop in p.rule.eachProperty(rule) do
					local fld = p.rule.getPropertyField(rule, prop)
					local value = cfg[fld.name]
					if value ~= nil then
						value = m.getRulePropertyString(rule, prop, value, fld.kind)

						if value ~= nil and #value > 0 then
							m.element(prop.name, nil, '%s', value)
						end
					end
				end
				p.pop()
			end)

			if #contents > 0 then
				p.push('<%s>', rule.name)
				p.outln(contents)
				p.pop('</%s>', rule.name)
			end
		end
	end


--
-- Reference any managed assemblies listed in the links()
--

	function m.assemblyReferences(prj)
		-- Visual Studio doesn't support per-config references; use
		-- whatever is contained in the first configuration
		local cfg = project.getfirstconfig(prj)

		local refs = config.getlinks(cfg, "system", "fullpath", "managed")
		if #refs > 0 then
			p.push('<ItemGroup>')
			for i = 1, #refs do
				local value = refs[i]

				-- If the link contains a '/' then it is a relative path to
				-- a local assembly. Otherwise treat it as a system assembly.
				if value:find('/', 1, true) then
					p.push('<Reference Include="%s">', path.getbasename(value))
					p.x('<HintPath>%s</HintPath>', path.translate(value))
					p.pop('</Reference>')
				else
					p.x('<Reference Include="%s" />', path.getbasename(value))
				end
			end
			p.pop('</ItemGroup>')
		end
	end


	function m.generatedFile(cfg, file)
		if file.generated then
			local path = path.translate(file.dependsOn.relpath)
			m.element("AutoGen", nil, 'true')
			m.element("DependentUpon", nil, path)
		end
	end


---
-- Write out the list of source code files, and any associated configuration.
---

	function m.files(prj)
		local groups = m.categorizeSources(prj)
		for _, group in ipairs(groups) do
			group.category.emitFiles(prj, group)
		end
	end


	m.categories = {}

---
-- ClInclude group
---
	m.categories.ClInclude = {
		name       = "ClInclude",
		extensions = { ".h", ".hh", ".hpp", ".hxx", ".inl" },
		priority   = 1,

		emitFiles = function(prj, group)
			m.emitFiles(prj, group, "ClInclude", {m.generatedFile})
		end,

		emitFilter = function(prj, group)
			m.filterGroup(prj, group, "ClInclude")
		end
	}


---
-- ClCompile group
---
	m.categories.ClCompile = {
		name       = "ClCompile",
		extensions = { ".cc", ".cpp", ".cxx", ".c++", ".c", ".s", ".m", ".mm" },
		priority   = 2,

		emitFiles = function(prj, group)
			local fileCfgFunc = function(fcfg, condition)
				if fcfg then
					return {
						m.excludedFromBuild,
						m.objectFileName,
						m.clCompilePreprocessorDefinitions,
						m.clCompileUndefinePreprocessorDefinitions,
						m.optimization,
						m.forceIncludes,
						m.precompiledHeader,
						m.enableEnhancedInstructionSet,
						m.additionalCompileOptions,
						m.disableSpecificWarnings,
						m.treatSpecificWarningsAsErrors,
						m.basicRuntimeChecks,
						m.exceptionHandling,
						m.compileAsManaged,
						m.compileAs,
						m.runtimeTypeInfo,
						m.warningLevelFile,
					}
				else
					return {
						m.excludedFromBuild
					}
				end
			end

			m.emitFiles(prj, group, "ClCompile", {m.generatedFile}, fileCfgFunc)
		end,

		emitFilter = function(prj, group)
			m.filterGroup(prj, group, "ClCompile")
		end
	}


---
-- FxCompile group
---
	m.categories.FxCompile = {
		name	   = "FxCompile",
		extensions = { ".hlsl" },
		priority   = 4,

		emitFiles = function(prj, group)
			local fileCfgFunc = function(fcfg, condition)
				if fcfg then
					return {
						m.excludedFromBuild,
						m.fxCompilePreprocessorDefinition,
						m.fxCompileAdditionalIncludeDirs,
						m.fxCompileShaderType,
						m.fxCompileShaderModel,
						m.fxCompileShaderEntry,
						m.fxCompileShaderVariableName,
						m.fxCompileShaderHeaderOutput,
						m.fxCompileShaderObjectOutput,
						m.fxCompileShaderAssembler,
						m.fxCompileShaderAssemblerOutput,
						m.fxCompileShaderAdditionalOptions,
					}
				else
					return {
						m.excludedFromBuild
					}
				end
			end

			m.emitFiles(prj, group, "FxCompile", nil, fileCfgFunc)
		end,

		emitFilter = function(prj, group)
			m.filterGroup(prj, group, "FxCompile")
		end
	}


---
-- None group
---
	m.categories.None = {
		name = "None",
		priority = 5,

		emitFiles = function(prj, group)
			m.emitFiles(prj, group, "None", {m.generatedFile})
		end,

		emitFilter = function(prj, group)
			m.filterGroup(prj, group, "None")
		end
	}


---
-- ResourceCompile group
---
	m.categories.ResourceCompile = {
		name       = "ResourceCompile",
		extensions = ".rc",
		priority   = 6,

		emitFiles = function(prj, group)
			local fileCfgFunc = {
				m.excludedFromBuild
			}

			m.emitFiles(prj, group, "ResourceCompile", nil, fileCfgFunc)
		end,

		emitFilter = function(prj, group)
			m.filterGroup(prj, group, "ResourceCompile")
		end
	}


---
-- CustomBuild group
---
	m.categories.CustomBuild = {
		name = "CustomBuild",
		priority = 7,

		emitFiles = function(prj, group)
			local fileFunc = {
				m.fileType
			}

			local fileCfgFunc = {
				m.excludedFromBuild,
				m.buildCommands,
				m.buildOutputs,
				m.linkObjects,
				m.buildMessage,
				m.buildAdditionalInputs
			}

			m.emitFiles(prj, group, "CustomBuild", fileFunc, fileCfgFunc, function (cfg, fcfg)
				return fileconfig.hasCustomBuildRule(fcfg)
			end)
		end,

		emitFilter = function(prj, group)
			m.filterGroup(prj, group, "CustomBuild")
		end
	}


---
-- Midl group
---
	m.categories.Midl = {
		name       = "Midl",
		extensions = ".idl",
		priority   = 8,

		emitFiles = function(prj, group)
			local fileCfgFunc = {
				m.excludedFromBuild
			}

			m.emitFiles(prj, group, "Midl", nil, fileCfgFunc, function(cfg)
				return cfg.system == p.WINDOWS
			end)
		end,

		emitFilter = function(prj, group)
			m.filterGroup(prj, group, "Midl")
		end
	}


---
-- Masm group
---
	m.categories.Masm = {
		name       = "Masm",
		extensions = ".asm",
		priority   = 9,

		emitFiles = function(prj, group)
			local fileCfgFunc = function(fcfg, condition)
				if fcfg then
					return {
						m.MasmPreprocessorDefinitions,
						m.excludedFromBuild,
						m.exceptionHandlingSEH,
					}
				else
					return {
						m.excludedFromBuild
					}
				end
			end
			m.emitFiles(prj, group, "Masm", nil, fileCfgFunc)
		end,

		emitFilter = function(prj, group)
			m.filterGroup(prj, group, "Masm")
		end,

		emitExtensionSettings = function(prj, group)
			p.w('<Import Project="$(VCTargetsPath)\\BuildCustomizations\\masm.props" />')
		end,

		emitExtensionTargets = function(prj, group)
			p.w('<Import Project="$(VCTargetsPath)\\BuildCustomizations\\masm.targets" />')
		end
	}


---
-- Image group
---
	m.categories.Image = {
		name       = "Image",
		extensions = { ".gif", ".jpg", ".jpe", ".png", ".bmp", ".dib", "*.tif", "*.wmf", "*.ras", "*.eps", "*.pcx", "*.pcd", "*.tga", "*.dds" },
		priority   = 10,

		emitFiles = function(prj, group)
			local fileCfgFunc = function(fcfg, condition)
				return {
					m.excludedFromBuild
				}
			end
			m.emitFiles(prj, group, "Image", nil, fileCfgFunc)
		end,

		emitFilter = function(prj, group)
			m.filterGroup(prj, group, "Image")
		end
	}


---
-- Natvis group
---
	m.categories.Natvis = {
		name       = "Natvis",
		extensions = { ".natvis" },
		priority   = 11,

		emitFiles = function(prj, group)
			m.emitFiles(prj, group, "Natvis", {m.generatedFile})
		end,

		emitFilter = function(prj, group)
			m.filterGroup(prj, group, "Natvis")
		end
	}


---
-- Categorize files into groups.
---
	function m.categorizeSources(prj)
		-- if we already did this, return the cached result.
		if prj._vc2010_sources then
			return prj._vc2010_sources
		end

		-- build the new group table.
		local result = {}
		local groups = {}
		prj._vc2010_sources = result

		local tr = project.getsourcetree(prj)
		tree.traverse(tr, {
			onleaf = function(node)
				local cat = m.categorizeFile(prj, node)
				groups[cat.name] = groups[cat.name] or {
					category = cat,
					files = {}
				}
				table.insert(groups[cat.name].files, node)
			end
		})

		-- sort by relative-to path; otherwise VS will reorder the files
		for name, group in pairs(groups) do
			table.sort(group.files, function (a, b)
				return a.relpath < b.relpath
			end)
			table.insert(result, group)
		end

		-- sort by category priority then name; so we get stable results.
		table.sort(result, function (a, b)
			if (a.category.priority == b.category.priority) then
				return a.category.name < b.category.name
			end
			return a.category.priority < b.category.priority
		end)

		return result
	end


	function m.categorizeFile(prj, file)
		for cfg in project.eachconfig(prj) do
			local fcfg = fileconfig.getconfig(file, cfg)
			if fcfg then
				-- If any configuration for this file uses a custom build step, that's the category to use
				if fileconfig.hasCustomBuildRule(fcfg) then
					return m.categories.CustomBuild
				end

				-- also check for buildaction
				if fcfg.buildaction then
					return m.categories[fcfg.buildaction] or m.categories.None
				end
			end
		end

		-- If there is a custom rule associated with it, use that
		local rule = p.global.getRuleForFile(file.name, prj.rules)
		if rule then
			return {
				name      = rule.name,
				priority  = 100,
				rule      = rule,
				emitFiles = function(prj, group)
					m.emitRuleFiles(prj, group)
				end,
				emitFilter = function(prj, group)
					m.filterGroup(prj, group, group.category.name)
				end
			}
		end

		-- Otherwise use the file extension to deduce a category
		for _, cat in pairs(m.categories) do
			if cat.extensions and path.hasextension(file.name, cat.extensions) then
				return cat
			end
		end

		return m.categories.None
	end


	function m.configPair(cfg)
		return vstudio.projectPlatform(cfg) .. "|" .. vstudio.archFromConfig(cfg, true)
	end


	function m.getTotalCfgCount(prj)
		if prj._totalCfgCount then
			return prj._totalCfgCount
		else
			local result = 0
			for _ in p.project.eachconfig(prj) do
				result = result + 1
			end
			-- cache result
			prj._totalCfgCount = result
			return result
		end
	end


	function m.indexConditionalElements()
		local nameMap, nameList, settingList
		nameMap = {}
		nameList = {} -- to preserve ordering
		settingList = {} -- to preserve ordering
		for _, element in ipairs(m.conditionalElements) do
			local settingMap = nameMap[element.name]
			if not settingMap then
				settingMap = {}
				nameMap[element.name] = settingMap
				if not table.contains(nameList, element.name) then
					table.insert(nameList, element.name)
				end
			end
			--setting will either be value or args
			local elementSet = settingMap[element.setting]
			if elementSet then
				table.insert(elementSet, element)
			else
				elementSet = {element}
				settingMap[element.setting] = elementSet
				if not table.contains(settingList, element.setting) then
					table.insert(settingList, element.setting)
				end
			end
		end
		return nameMap, nameList, settingList
	end


	function m.emitConditionalElements(prj)
		local keyCount = function(tbl)
			local count = 0
			for _ in pairs(tbl) do count = count + 1 end
			return count
		end

		local nameMap, nameList, settingList
		nameMap, nameList, settingList = m.indexConditionalElements()

		local totalCfgCount = m.getTotalCfgCount(prj)
		for _, name in ipairs(nameList) do
			local settingMap = nameMap[name]
			local done = false
			if keyCount(settingMap)==1 then
				for _, setting in ipairs(settingList) do
					local elements = settingMap[setting]
					if elements~=nil and #elements==totalCfgCount then
						local element = elements[1]
						local format = string.format('<%s>%s</%s>', name, element.value, name)
						p.w(format, table.unpack(element.args))
						done = true
					end
				end
			end
			if not done then
				for _, setting in ipairs(settingList) do
					local elements = settingMap[setting]
					if elements then
						for _, element in ipairs(elements) do
							local format = string.format('<%s %s>%s</%s>', name, m.conditionFromConfigText(element.condition), element.value, name)
							p.w(format, table.unpack(element.args))
						end
					end
				end
			end
		end
	end

	function m.emitFiles(prj, group, tag, fileFunc, fileCfgFunc, checkFunc)
		local files = group.files
		if files and #files > 0 then
			p.push('<ItemGroup>')
			for _, file in ipairs(files) do

				local contents = p.capture(function ()
					p.push()
					p.callArray(fileFunc, cfg, file)
					m.conditionalElements = {}
					for cfg in project.eachconfig(prj) do
						local fcfg = fileconfig.getconfig(file, cfg)
						if not checkFunc or checkFunc(cfg, fcfg) then
							p.callArray(fileCfgFunc, fcfg, m.configPair(cfg))
						end
					end
					if #m.conditionalElements > 0 then
						m.emitConditionalElements(prj)
					end
					p.pop()
				end)

				local rel = path.translate(file.relpath)

				-- SharedItems projects paths are prefixed with a magical variable
				if prj.kind == p.SHAREDITEMS then
					rel = "$(MSBuildThisFileDirectory)" .. rel
				end

				if #contents > 0 then
					p.push('<%s Include="%s">', tag, rel)
					p.outln(contents)
					p.pop('</%s>', tag)
				else
					p.x('<%s Include="%s" />', tag, rel)
				end

			end
			p.pop('</ItemGroup>')
		end
	end

	function m.emitRuleFiles(prj, group)
		local files = group.files
		local rule = group.category.rule

		if files and #files > 0 then
			p.push('<ItemGroup>')

			for _, file in ipairs(files) do
				local contents = p.capture(function()
					p.push()
					for prop in p.rule.eachProperty(rule) do
						local fld = p.rule.getPropertyField(rule, prop)
						m.conditionalElements = {}
						for cfg in project.eachconfig(prj) do
							local fcfg = fileconfig.getconfig(file, cfg)
							if fcfg and fcfg[fld.name] then
								local value = m.getRulePropertyString(rule, prop, fcfg[fld.name])
								if value and #value > 0 then
									m.element(prop.name, m.configPair(cfg), '%s', value)
								end
								end
							end
						if #m.conditionalElements > 0 then
							m.emitConditionalElements(prj)
						end
					end
					p.pop()
				end)

				if #contents > 0 then
					p.push('<%s Include=\"%s\">', rule.name, path.translate(file.relpath))
					p.outln(contents)
					p.pop('</%s>', rule.name)
				else
					p.x('<%s Include=\"%s\" />', rule.name, path.translate(file.relpath))
				end
			end

			p.pop('</ItemGroup>')
		end
	end


	function m.isClrMixed(prj)
		-- check to see if any files are marked with clr
		local isMixed = false
		if not prj.clr or prj.clr == p.OFF then
			if prj._isClrMixed ~= nil then
				isMixed = prj._isClrMixed
			else
				table.foreachi(prj._.files, function(file)
					for cfg in p.project.eachconfig(prj) do
						local fcfg = p.fileconfig.getconfig(file, cfg)
						if fcfg and fcfg.clr and fcfg.clr ~= p.OFF then
							isMixed = true
						end
					end
				end)
				prj._isClrMixed = isMixed -- cache the results
			end
		end
		return isMixed
	end


--
-- Generate the list of project dependencies.
--

	m.elements.projectReferences = function(prj, ref)
		if prj.clr ~= p.OFF or (m.isClrMixed(prj) and ref and ref.kind ~=p.STATICLIB) then
			return {
				m.referenceProject,
				m.referencePrivate,
				m.referenceOutputAssembly,
				m.referenceCopyLocalSatelliteAssemblies,
				m.referenceLinkLibraryDependencies,
				m.referenceUseLibraryDependences,
			}
		else
			return {
				m.referenceProject,
			}
		end
	end

	function m.projectReferences(prj)
		local refs = project.getdependencies(prj, 'linkOnly')
		-- Handle linked shared items projects
		local contents = p.capture(function()
			p.push()
			for _, ref in ipairs(refs) do
				if ref.kind == p.SHAREDITEMS then
					local relpath = vstudio.path(prj, vstudio.projectfile(ref))
					p.x('<Import Project="%s" Label="Shared" />', relpath)
				end
			end
			p.pop()
		end)
		if #contents > 0 then
			p.push('<ImportGroup Label="Shared">')
			p.outln(contents)
			p.pop('</ImportGroup>')
		end

		-- Handle all other linked projects
		local contents = p.capture(function()
			p.push()
			for _, ref in ipairs(refs) do
				if ref.kind ~= p.SHAREDITEMS then
					local relpath = vstudio.path(prj, vstudio.projectfile(ref))
					p.push('<ProjectReference Include=\"%s\">', relpath)
					p.callArray(m.elements.projectReferences, prj, ref)
					p.pop('</ProjectReference>')
				end
			end
			p.pop()
		end)
		if #contents > 0 then
			p.push('<ItemGroup>')
			p.outln(contents)
			p.pop('</ItemGroup>')
		end
	end



---------------------------------------------------------------------------
--
-- Handlers for individual project elements
--
---------------------------------------------------------------------------

	function m.additionalDependencies(cfg, explicit)
		local links

		-- check to see if this project uses an external toolset. If so, let the
		-- toolset define the format of the links
		local toolset = config.toolset(cfg)
		if cfg.system ~= premake.WINDOWS and toolset then
			links = toolset.getlinks(cfg, not explicit)
		else
			links = vstudio.getLinks(cfg, explicit)
		end

		if #links > 0 then
			links = path.translate(table.concat(links, ";"))
			m.element("AdditionalDependencies", nil, "%s;%%(AdditionalDependencies)", links)
		end
	end


	function m.additionalIncludeDirectories(cfg, includedirs)
		if #includedirs > 0 then
			local dirs = vstudio.path(cfg, includedirs)
			if #dirs > 0 then
				m.element("AdditionalIncludeDirectories", nil, "%s;%%(AdditionalIncludeDirectories)", table.concat(dirs, ";"))
			end
		end
	end


	function m.additionalLibraryDirectories(cfg)
		if #cfg.libdirs > 0 then
			local dirs = table.concat(vstudio.path(cfg, cfg.libdirs), ";")
			m.element("AdditionalLibraryDirectories", nil, "%s;%%(AdditionalLibraryDirectories)", dirs)
		end
	end


	function m.additionalManifestFiles(cfg)
		-- get the manifests files
		local manifests = {}
		for _, fname in ipairs(cfg.files) do
			if path.getextension(fname) == ".manifest" then
				table.insert(manifests, project.getrelative(cfg.project, fname))
			end
		end

		if #manifests > 0 then
			m.element("AdditionalManifestFiles", nil, "%s;%%(AdditionalManifestFiles)", table.concat(manifests, ";"))
		end
	end


	function m.additionalUsingDirectories(cfg)
		if #cfg.usingdirs > 0 then
			local dirs = vstudio.path(cfg, cfg.usingdirs)
			if #dirs > 0 then
				m.element("AdditionalUsingDirectories", nil, "%s;%%(AdditionalUsingDirectories)", table.concat(dirs, ";"))
			end
		end
	end


	function m.largeAddressAware(cfg)
		if (cfg.largeaddressaware == true) then
			m.element("LargeAddressAware", nil, 'true')
		end
	end


	function m.languageStandard(cfg)
		if _ACTION >= "vs2017" then
			if (cfg.cppdialect == "C++14") then
				m.element("LanguageStandard", nil, 'stdcpp14')
			elseif (cfg.cppdialect == "C++17") then
				m.element("LanguageStandard", nil, 'stdcpp17')
			elseif (cfg.cppdialect == "C++20") then
				m.element("LanguageStandard", nil, 'stdcpplatest')
			elseif (cfg.cppdialect == "C++latest") then
				m.element("LanguageStandard", nil, 'stdcpplatest')
			end
		end
	end

	function m.conformanceMode(cfg)
		if _ACTION >= "vs2017" then
			if cfg.conformancemode ~= nil then
				if cfg.conformancemode then
					m.element("ConformanceMode", nil, "true")
				else
					m.element("ConformanceMode", nil, "false")
				end
			end
		end
	end

	function m.structMemberAlignment(cfg)
		local map = {
			[1] = "1Byte",
			[2] = "2Bytes",
			[4] = "4Bytes",
			[8] = "8Bytes",
			[16] = "16Bytes"
		}

		local value = map[cfg.structmemberalign]
		if value then
			m.element("StructMemberAlignment", nil, value)
		end
	end

	function m.useFullPaths(cfg)
		if cfg.useFullPaths ~= nil then
			if cfg.useFullPaths then
				m.element("UseFullPaths", nil, "true")
			else
				m.element("UseFullPaths", nil, "false")
			end
		end
	end

	function m.removeUnreferencedCodeData(cfg)
		if cfg.removeUnreferencedCodeData ~= nil then
			if cfg.removeUnreferencedCodeData then
				m.element("RemoveUnreferencedCodeData", nil, "true")
			else
				m.element("RemoveUnreferencedCodeData", nil, "false")
			end
		end
	end

	function m.additionalCompileOptions(cfg, condition)
		local opts = cfg.buildoptions
		if _ACTION == "vs2015" or vstudio.isMakefile(cfg) then
			if (cfg.cppdialect == "C++14") then
				table.insert(opts, "/std:c++14")
			elseif (cfg.cppdialect == "C++17") then
				table.insert(opts, "/std:c++17")
			elseif (cfg.cppdialect == "C++20") then
				table.insert(opts, "/std:c++latest")
			elseif (cfg.cppdialect == "C++latest") then
				table.insert(opts, "/std:c++latest")
			end
		end

		if cfg.toolset and cfg.toolset:startswith("msc") then
			local value = iif(cfg.unsignedchar, "On", "Off")
			table.insert(opts, p.tools.msc.shared.unsignedchar[value])
		elseif _ACTION >= "vs2019" and cfg.toolset and cfg.toolset == "clang" then
			local value = iif(cfg.unsignedchar, "On", "Off")
			table.insert(opts, p.tools.msc.shared.unsignedchar[value])
		end

		if #opts > 0 then
			opts = table.concat(opts, " ")
			m.element("AdditionalOptions", condition, '%s %%(AdditionalOptions)', opts)
		end
	end


	function m.additionalLinkOptions(cfg)
		if #cfg.linkoptions > 0 then
			local opts = table.concat(cfg.linkoptions, " ")
			m.element("AdditionalOptions", nil, "%s %%(AdditionalOptions)", opts)
		end
	end


	function m.compileAsManaged(fcfg, condition)
		if fcfg.clr and fcfg ~= p.OFF then
			m.element("CompileAsManaged", condition, "true")
		end
	end


	function m.basicRuntimeChecks(cfg, condition)
		local prjcfg, filecfg = p.config.normalize(cfg)
		local runtime = config.getruntime(prjcfg) or iif(config.isDebugBuild(cfg), "Debug", "Release")
		if filecfg then
			if filecfg.flags.NoRuntimeChecks or (config.isOptimizedBuild(filecfg) and runtime:endswith("Debug")) then
				m.element("BasicRuntimeChecks", condition, "Default")
			end
		else
			if prjcfg.flags.NoRuntimeChecks or (config.isOptimizedBuild(prjcfg) and runtime:endswith("Debug")) then
				m.element("BasicRuntimeChecks", nil, "Default")
			end
		end
	end

	function m.buildInputs(cfg, condition)
		if cfg.buildinputs and #cfg.buildinputs > 0 then
			local inputs = project.getrelative(cfg.project, cfg.buildinputs)
			m.element("Inputs", condition, '%s', table.concat(inputs, ";"))
		end
	end

	function m.buildAdditionalInputs(fcfg, condition)
		if fcfg.buildinputs and #fcfg.buildinputs > 0 then
			local inputs = project.getrelative(fcfg.project, fcfg.buildinputs)
			m.element("AdditionalInputs", condition, '%s', table.concat(inputs, ";"))
		end
	end


	function m.buildCommands(fcfg, condition)
		if #fcfg.buildcommands > 0 then
			local commands = os.translateCommandsAndPaths(fcfg.buildcommands, fcfg.project.basedir, fcfg.project.location)
			m.element("Command", condition, '%s', table.concat(commands,'\r\n'))
		end
	end


	function m.buildLog(cfg)
		if cfg.buildlog and #cfg.buildlog > 0 then
			p.push('<BuildLog>')
			m.element("Path", nil, "%s", vstudio.path(cfg, cfg.buildlog))
			p.pop('</BuildLog>')
		end
	end


	function m.buildMessage(fcfg, condition)
		if fcfg.buildmessage then
			m.element("Message", condition, '%s', fcfg.buildmessage)
		end
	end


	function m.buildOutputs(fcfg, condition)
		if #fcfg.buildoutputs > 0 then
			local outputs = project.getrelative(fcfg.project, fcfg.buildoutputs)
			m.element("Outputs", condition, '%s', table.concat(outputs, ";"))
		end
	end


	function m.linkObjects(fcfg, condition)
		if fcfg.linkbuildoutputs ~= nil then
			m.element("LinkObjects", condition, tostring(fcfg.linkbuildoutputs))
		end
	end


	function m.characterSet(cfg)
		if not vstudio.isMakefile(cfg) then
			local charactersets = {
				ASCII = "NotSet",
				MBCS = "MultiByte",
				Unicode = "Unicode",
				Default = "Unicode"
			}
			m.element("CharacterSet", nil, charactersets[cfg.characterset])
		end
	end


	function m.wholeProgramOptimization(cfg)
		if cfg.flags.LinkTimeOptimization then
			m.element("WholeProgramOptimization", nil, "true")
		end
	end

	function m.clCompileAdditionalIncludeDirectories(cfg)
		m.additionalIncludeDirectories(cfg, cfg.includedirs)
	end

	function m.clCompileAdditionalUsingDirectories(cfg)
		m.additionalUsingDirectories(cfg, cfg.usingdirs)
	end


	function m.clCompilePreprocessorDefinitions(cfg, condition)
		local defines = cfg.defines
		if cfg.exceptionhandling == p.OFF then
			defines = table.join(defines, "_HAS_EXCEPTIONS=0")
		end
		m.preprocessorDefinitions(cfg, defines, false, condition)
	end


	function m.clCompileUndefinePreprocessorDefinitions(cfg, condition)
		m.undefinePreprocessorDefinitions(cfg, cfg.undefines, false, condition)
	end


	function m.clrSupport(cfg)
		local value
		if cfg.clr == "On" or cfg.clr == "Unsafe" then
			value = "true"
		elseif cfg.clr ~= p.OFF then
			value = cfg.clr
		end
		if value then
			m.element("CLRSupport", nil, value)
		end
	end


	function m.compileAs(cfg, condition)
		if p.languages.isc(cfg.compileas) then
			m.element("CompileAs", condition, "CompileAsC")
		elseif p.languages.iscpp(cfg.compileas) then
			m.element("CompileAs", condition, "CompileAsCpp")
		end
	end


	function m.configurationType(cfg)
		local types = {
			SharedLib = "DynamicLibrary",
			StaticLib = "StaticLibrary",
			ConsoleApp = "Application",
			WindowedApp = "Application",
			Makefile = "Makefile",
			None = "Makefile",
			Utility = "Utility",
		}
		m.element("ConfigurationType", nil, types[cfg.kind])
	end


	function m.culture(cfg)
		local value = vstudio.cultureForLocale(cfg.locale)
		if value then
			m.element("Culture", nil, "0x%04x", tostring(value))
		end
	end


	function m.debugInformationFormat(cfg)
		local value
		local tool, toolVersion = p.config.toolset(cfg)
		if (cfg.symbols == p.ON) or (cfg.symbols == "FastLink") or (cfg.symbols == "Full") then
			if cfg.debugformat == "c7" then
				value = "OldStyle"
			elseif (cfg.architecture == "x86_64" and _ACTION < "vs2015") or
				   cfg.clr ~= p.OFF or
				   config.isOptimizedBuild(cfg) or
				   cfg.editandcontinue == p.OFF or
				   (toolVersion and toolVersion:startswith("LLVM-vs"))
			then
				value = "ProgramDatabase"
			else
				value = "EditAndContinue"
			end

			m.element("DebugInformationFormat", nil, value)
		elseif cfg.symbols == p.OFF then
			-- leave field blank for vs2013 and older to workaround bug
			if _ACTION < "vs2015" then
				value = ""
			else
				value = "None"
			end

			m.element("DebugInformationFormat", nil, value)
		end
	end


	function m.enableDpiAwareness(cfg)
		local awareness = {
			None = "false",
			High = "true",
			HighPerMonitor = "PerMonitorHighDPIAware",
		}
		local value = awareness[cfg.dpiawareness]

		if value then
			m.element("EnableDpiAwareness", nil, value)
		end
	end


	function m.enableEnhancedInstructionSet(cfg, condition)
		local v
		local x = cfg.vectorextensions
		if x == "AVX" and _ACTION > "vs2010" then
			v = "AdvancedVectorExtensions"
		elseif x == "AVX2" and _ACTION > "vs2012" then
			v = "AdvancedVectorExtensions2"
		elseif cfg.architecture ~= "x86_64" then
			if x == "SSE2" or x == "SSE3" or x == "SSSE3" or x == "SSE4.1" then
				v = "StreamingSIMDExtensions2"
			elseif x == "SSE" then
				v = "StreamingSIMDExtensions"
			elseif x == "IA32" and _ACTION > "vs2010" then
				v = "NoExtensions"
			end
		end
		if v then
			m.element('EnableEnhancedInstructionSet', condition, v)
		end
	end


	function m.entryPointSymbol(cfg)
		if cfg.entrypoint then
			m.element("EntryPointSymbol", nil, cfg.entrypoint)
		end
	end


	function m.exceptionHandling(cfg, condition)
		if cfg.exceptionhandling == p.OFF then
			m.element("ExceptionHandling", condition, "false")
		elseif cfg.exceptionhandling == "SEH" then
			m.element("ExceptionHandling", condition, "Async")
		elseif cfg.exceptionhandling == "On" then
			m.element("ExceptionHandling", condition, "Sync")
		elseif cfg.exceptionhandling == "CThrow" then
			m.element("ExceptionHandling", condition, "SyncCThrow")
		end
	end


	function m.excludedFromBuild(filecfg, condition)
		if not filecfg or filecfg.flags.ExcludeFromBuild then
			m.element("ExcludedFromBuild", condition, "true")
		end
	end


	function m.exceptionHandlingSEH(filecfg, condition)
		if not filecfg or filecfg.exceptionhandling == "SEH" then
			m.element("UseSafeExceptionHandlers", condition, "true")
		end
	end


	function m.extensionsToDeleteOnClean(cfg)
		if #cfg.cleanextensions > 0 then
			local value = table.implode(cfg.cleanextensions, "*", ";", "")
			m.element("ExtensionsToDeleteOnClean", nil, value .. "$(ExtensionsToDeleteOnClean)")
		end
	end


	function m.fileType(cfg, file)
		m.element("FileType", nil, "Document")
	end


	function m.floatingPointModel(cfg)
		if cfg.floatingpoint and cfg.floatingpoint ~= "Default" then
			m.element("FloatingPointModel", nil, cfg.floatingpoint)
		end
	end


	function m.floatingPointExceptions(cfg)
		if cfg.floatingpointexceptions ~= nil then
			if cfg.floatingpointexceptions then
				m.element("FloatingPointExceptions", nil, "true")
			else
				m.element("FloatingPointExceptions", nil, "false")
			end
		end
	end


	function m.inlineFunctionExpansion(cfg)
		if cfg.inlining then
			local types = {
				Default = "Default",
				Disabled = "Disabled",
				Explicit = "OnlyExplicitInline",
				Auto = "AnySuitable",
			}
			m.element("InlineFunctionExpansion", nil, types[cfg.inlining])
		end
	end


	function m.forceIncludes(cfg, condition)
		if #cfg.forceincludes > 0 then
			local includes = vstudio.path(cfg, cfg.forceincludes)
			if #includes > 0 then
				m.element("ForcedIncludeFiles", condition, table.concat(includes, ';'))
			end
		end
		if #cfg.forceusings > 0 then
			local usings = vstudio.path(cfg, cfg.forceusings)
			if #usings > 0 then
				m.element("ForcedUsingFiles", condition, table.concat(usings, ';'))
			end
		end
	end


	function m.fullProgramDatabaseFile(cfg)
		if _ACTION >= "vs2015" and cfg.symbols == "FastLink" then
			m.element("FullProgramDatabaseFile", nil, "true")
		end
	end

	function m.assemblyDebug(cfg)
		if cfg.assemblydebug then
      		m.element("AssemblyDebug", nil, "true")
		end
	end


	function m.functionLevelLinking(cfg)
		if cfg.functionlevellinking ~= nil then
			if cfg.functionlevellinking then
				m.element("FunctionLevelLinking", nil, "true")
			else
				m.element("FunctionLevelLinking", nil, "false")
			end
		elseif config.isOptimizedBuild(cfg) then
			m.element("FunctionLevelLinking", nil, "true")
		end
	end


	function m.generateDebugInformation(cfg)
		local lookup = {}
		if _ACTION >= "vs2017" then
			lookup[p.ON]       = "true"
			lookup[p.OFF]      = "false"
			lookup["FastLink"] = "DebugFastLink"
			lookup["Full"]     = "DebugFull"
		elseif _ACTION == "vs2015" then
			lookup[p.ON]       = "true"
			lookup[p.OFF]      = "false"
			lookup["FastLink"] = "DebugFastLink"
			lookup["Full"]     = "true"
		else
			lookup[p.ON]       = "true"
			lookup[p.OFF]      = "false"
			lookup["FastLink"] = "true"
			lookup["Full"]     = "true"
		end

		local value = lookup[cfg.symbols]
		if value then
			m.element("GenerateDebugInformation", nil, value)
		end
	end


	function m.generateManifest(cfg)
		if cfg.flags.NoManifest then
			m.element("GenerateManifest", nil, "false")
		end
	end


	function m.generateMapFile(cfg)
		if cfg.flags.Maps then
			m.element("GenerateMapFile", nil, "true")
		end
	end


	function m.ignoreDefaultLibraries(cfg)
		if #cfg.ignoredefaultlibraries > 0 then
			local ignored = cfg.ignoredefaultlibraries
			for i = 1, #ignored do
				-- Add extension if required
				if not p.tools.msc.getLibraryExtensions()[ignored[i]:match("[^.]+$")] then
					ignored[i] = path.appendextension(ignored[i], ".lib")
				end
			end

			m.element("IgnoreSpecificDefaultLibraries", condition, table.concat(ignored, ';'))
		end
	end


	function m.ignoreWarnDuplicateFilename(prj)
		-- VS 2013 warns on duplicate file names, even those files which are
		-- contained in different, mututally exclusive configurations. See:
		-- http://connect.microsoft.com/VisualStudio/feedback/details/797460/incorrect-warning-msb8027-reported-for-files-excluded-from-build
		-- Premake already adds unique object names to conflicting file names, so
		-- just go ahead and disable that warning.
		if _ACTION > "vs2012" then
			m.element("IgnoreWarnCompileDuplicatedFilename", nil, "true")
		end
	end


	function m.ignoreImportLibrary(cfg)
		if cfg.kind == p.SHAREDLIB and cfg.flags.NoImportLib then
			m.element("IgnoreImportLibrary", nil, "true")
		end
	end


	function m.importLanguageTargets(prj)
		p.w('<Import Project="$(VCTargetsPath)\\Microsoft.Cpp.targets" />')
	end

	m.elements.importExtensionTargets = function(prj)
		return {
			m.importGroupTargets,
			m.importRuleTargets,
			m.importNuGetTargets,
			m.importBuildCustomizationsTargets
		}
	end

	function m.importExtensionTargets(prj)
		p.push('<ImportGroup Label="ExtensionTargets">')
		p.callArray(m.elements.importExtensionTargets, prj)
		p.pop('</ImportGroup>')
	end

	function m.importGroupTargets(prj)
		local groups = m.categorizeSources(prj)
		for _, group in ipairs(groups) do
			if group.category.emitExtensionTargets then
				group.category.emitExtensionTargets(prj, group)
			end
		end
	end

	function m.importRuleTargets(prj)
		for i = 1, #prj.rules do
			local rule = p.global.getRule(prj.rules[i])
			local loc = vstudio.path(prj, p.filename(rule, ".targets"))
			p.x('<Import Project="%s" />', loc)
		end
	end

	local function nuGetTargetsFile(prj, package)
		local packageAPIInfo = vstudio.nuget2010.packageAPIInfo(prj, package)
		return p.vstudio.path(prj, p.filename(prj.workspace, string.format("packages\\%s.%s\\build\\native\\%s.targets", vstudio.nuget2010.packageId(package), packageAPIInfo.verbatimVersion or packageAPIInfo.version, vstudio.nuget2010.packageId(package))))
	end

	function m.importNuGetTargets(prj)
		if not vstudio.nuget2010.supportsPackageReferences(prj) then
			for i = 1, #prj.nuget do
				local targetsFile = nuGetTargetsFile(prj, prj.nuget[i])
				p.x('<Import Project="%s" Condition="Exists(\'%s\')" />', targetsFile, targetsFile)
			end
		end
	end

	function m.importBuildCustomizationsTargets(prj)
		for i, build in ipairs(prj.buildcustomizations) do
			p.w('<Import Project="$(VCTargetsPath)\\%s.targets" />', path.translate(build))
		end
	end



	function m.ensureNuGetPackageBuildImports(prj)
		if #prj.nuget > 0 then
			p.push('<Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">')
			p.push('<PropertyGroup>')
			p.x('<ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>')
			p.pop('</PropertyGroup>')

			for i = 1, #prj.nuget do
				local targetsFile = nuGetTargetsFile(prj, prj.nuget[i])
				p.x('<Error Condition="!Exists(\'%s\')" Text="$([System.String]::Format(\'$(ErrorText)\', \'%s\'))" />', targetsFile, targetsFile)
			end
			p.pop('</Target>')
		end
	end



	function m.importDefaultProps(prj)
		p.w('<Import Project="$(VCTargetsPath)\\Microsoft.Cpp.Default.props" />')
	end



	function m.importLanguageSettings(prj)
		p.w('<Import Project="$(VCTargetsPath)\\Microsoft.Cpp.props" />')
	end

	m.elements.importExtensionSettings = function(prj)
		return {
			m.importGroupSettings,
			m.importRuleSettings,
			m.importBuildCustomizationsProps
		}
	end

	function m.importExtensionSettings(prj)
		p.push('<ImportGroup Label="ExtensionSettings">')
		p.callArray(m.elements.importExtensionSettings, prj)
		p.pop('</ImportGroup>')
	end


	function m.importGroupSettings(prj)
		local groups = m.categorizeSources(prj)
		for _, group in ipairs(groups) do
			if group.category.emitExtensionSettings then
				group.category.emitExtensionSettings(prj, group)
			end
		end
	end


	function m.importRuleSettings(prj)
		for i = 1, #prj.rules do
			local rule = p.global.getRule(prj.rules[i])
			local loc = vstudio.path(prj, p.filename(rule, ".props"))
			p.x('<Import Project="%s" />', loc)
		end
	end


	function m.importBuildCustomizationsProps(prj)
		for i, build in ipairs(prj.buildcustomizations) do
			p.w('<Import Project="$(VCTargetsPath)\\%s.props" />', path.translate(build))
		end
	end



	function m.importLibrary(cfg)
		if cfg.kind == p.SHAREDLIB then
			m.element("ImportLibrary", nil, "%s", path.translate(cfg.linktarget.relpath))
		end
	end


	function m.includePath(cfg)
		local dirs = vstudio.path(cfg, cfg.sysincludedirs)
		if #dirs > 0 then
			m.element("IncludePath", nil, "%s;$(IncludePath)", table.concat(dirs, ";"))
		end
	end


	function m.intDir(cfg)
		local objdir = vstudio.path(cfg, cfg.objdir)
		m.element("IntDir", nil, "%s\\", objdir)
	end


	function m.intrinsicFunctions(cfg)
		if cfg.intrinsics ~= nil then
			if cfg.intrinsics then
				m.element("IntrinsicFunctions", nil, "true")
			else
				m.element("IntrinsicFunctions", nil, "false")
			end
		elseif config.isOptimizedBuild(cfg) then
			m.element("IntrinsicFunctions", nil, "true")
		end
	end

	function m.justMyCodeDebugging(cfg)
		local jmc = cfg.justmycode

		if _ACTION >= "vs2017" and jmc == "Off" then
			m.element("SupportJustMyCode", nil, "false")
		end
	end

	function m.keyword(prj)
		-- try to determine what kind of targets we're building here
		local isWin, isManaged, isMakefile
		for cfg in project.eachconfig(prj) do
			if cfg.system == p.WINDOWS then
				isWin = true
			end
			if cfg.clr ~= p.OFF then
				isManaged = true
			end
			if vstudio.isMakefile(cfg) then
				isMakefile = true
			end
		end

		if isWin then
			if isMakefile then
				m.element("Keyword", nil, "MakeFileProj")
			else
				if isManaged or m.isClrMixed(prj) then
					m.targetFramework(prj)
				end
				if isManaged then
					m.element("Keyword", nil, "ManagedCProj")
				else
					m.element("Keyword", nil, "Win32Proj")
				end
				m.element("RootNamespace", nil, "%s", prj.name)
			end
		end
	end


	function m.libraryPath(cfg)
		local dirs = vstudio.path(cfg, cfg.syslibdirs)
		if #dirs > 0 then
			m.element("LibraryPath", nil, "%s;$(LibraryPath)", table.concat(dirs, ";"))
		end
	end



	function m.linkIncremental(cfg)
		if cfg.kind ~= p.STATICLIB then
			m.element("LinkIncremental", nil, "%s", tostring(config.canLinkIncremental(cfg)))
		end
	end


	function m.linkLibraryDependencies(cfg, explicit)
		-- Left to its own devices, VS will happily link against a project dependency
		-- that has been excluded from the build. As a workaround, disable dependency
		-- linking and list all siblings explicitly
		if explicit then
			p.push('<ProjectReference>')
			m.element("LinkLibraryDependencies", nil, "false")
			p.pop('</ProjectReference>')
		end
	end


	function m.MasmPreprocessorDefinitions(cfg, condition)
		if cfg.defines then
			m.preprocessorDefinitions(cfg, cfg.defines, false, condition)
		end
	end


	function m.minimalRebuild(cfg)
		if config.isOptimizedBuild(cfg) or
		   cfg.flags.NoMinimalRebuild or
		   cfg.flags.MultiProcessorCompile or
		   cfg.debugformat == p.C7
		then
			m.element("MinimalRebuild", nil, "false")
		end
	end


	function m.moduleDefinitionFile(cfg)
		local df = config.findfile(cfg, ".def")
		if df then
			m.element("ModuleDefinitionFile", nil, "%s", df)
		end
	end


	function m.multiProcessorCompilation(cfg)
		if cfg.flags.MultiProcessorCompile then
			m.element("MultiProcessorCompilation", nil, "true")
		end
	end


	function m.nmakeBuildCommands(cfg)
		m.nmakeCommandLine(cfg, cfg.buildcommands, "Build")
	end


	function m.nmakeCleanCommands(cfg)
		m.nmakeCommandLine(cfg, cfg.cleancommands, "Clean")
	end


	function m.nmakeCommandLine(cfg, commands, phase)
		if #commands > 0 then
			commands = os.translateCommandsAndPaths(commands, cfg.project.basedir, cfg.project.location)
			commands = table.concat(p.esc(commands), p.eol())
			p.w('<NMake%sCommandLine>%s</NMake%sCommandLine>', phase, commands, phase)
		end
	end


	function m.nmakeIncludeDirs(cfg)
		if cfg.kind ~= p.NONE and #cfg.includedirs > 0 then
			local dirs = vstudio.path(cfg, cfg.includedirs)
			if #dirs > 0 then
				m.element("NMakeIncludeSearchPath", nil, "%s", table.concat(dirs, ";"))
			end
		end
	end


	function m.nmakeOutDirs(cfg)
		if vstudio.isMakefile(cfg) then
			m.outDir(cfg)
			m.intDir(cfg)
		end
	end


	function m.windowsSDKDesktopARMSupport(cfg)
		if cfg.system == p.WINDOWS then
			if cfg.architecture == p.ARM then
				p.w('<WindowsSDKDesktopARMSupport>true</WindowsSDKDesktopARMSupport>')
			end
			if cfg.architecture == p.ARM64 then
				p.w('<WindowsSDKDesktopARM64Support>true</WindowsSDKDesktopARM64Support>')
			end
		end
	end


	function m.nmakeOutput(cfg)
		m.element("NMakeOutput", nil, "$(OutDir)%s", cfg.buildtarget.name)
	end


	function m.nmakePreprocessorDefinitions(cfg)
		if cfg.kind ~= p.NONE and #cfg.defines > 0 then
			local defines = table.concat(cfg.defines, ";")
			defines = defines .. ";$(NMakePreprocessorDefinitions)"
			m.element('NMakePreprocessorDefinitions', nil, defines)
		end
	end


	function m.nmakeRebuildCommands(cfg)
		m.nmakeCommandLine(cfg, cfg.rebuildcommands, "ReBuild")
	end


	function m.objectFileName(fcfg)
		if fcfg.objname ~= fcfg.basename then
			m.element("ObjectFileName", m.configPair(fcfg.config), "$(IntDir)\\%s.obj", fcfg.objname)
		end
	end


	function m.omitDefaultLib(cfg)
		if cfg.flags.OmitDefaultLibrary then
			m.element("OmitDefaultLibName", nil, "true")
		end
	end


	function m.omitFramePointers(cfg)
		local map = { Off = "false", On = "true" }
		local value = map[cfg.omitframepointer]

		if value then
			m.element("OmitFramePointers", nil, value)
		end
	end


	function m.optimizeReferences(cfg)
		if config.isOptimizedBuild(cfg) then
			m.element("EnableCOMDATFolding", nil, "true")
			m.element("OptimizeReferences", nil, "true")
		end
	end


	function m.optimization(cfg, condition)
		local map = { Off="Disabled", On="Full", Debug="Disabled", Full="Full", Size="MinSpace", Speed="MaxSpeed" }
		local value = map[cfg.optimize]
		if value or not condition then
			m.element('Optimization', condition, value or "Disabled")
		end
	end


	function m.outDir(cfg)
		local outdir = vstudio.path(cfg, cfg.buildtarget.directory)
		m.element("OutDir", nil, "%s\\", outdir)
	end


	function m.executablePath(cfg)
		local dirs = vstudio.path(cfg, cfg.bindirs)
		if #dirs > 0 then
			dirs = table.translate(dirs, function(dir)
				if path.isabsolute(dir) then
					return dir
				end
				return "$(ProjectDir)" .. dir
			end)
			m.element("ExecutablePath", nil, "%s;$(ExecutablePath)", table.concat(dirs, ";"))
		end
	end


	function m.platformToolset(cfg)
		local tool, version = p.config.toolset(cfg)

		if not version and _ACTION >= "vs2019" and cfg.toolset == "clang" then
			version = "ClangCL"
		end

		if not version then
			local value = p.action.current().toolset
			tool, version = p.tools.canonical(value)
		end

		if version then
			if cfg.kind == p.NONE or cfg.kind == p.MAKEFILE then
				if p.config.hasFile(cfg, path.iscppfile) or _ACTION >= "vs2015" then
					m.element("PlatformToolset", nil, version)
				end
			else
				m.element("PlatformToolset", nil, version)
			end
		end
	end

	function m.precompiledHeaderFile(fileName, cfg)
		m.element("PrecompiledHeaderFile", nil, "%s", fileName)
	end

	function m.precompiledHeader(cfg, condition)
		local prjcfg, filecfg = p.config.normalize(cfg)
		if filecfg then
			if prjcfg.pchsource == filecfg.abspath and not prjcfg.flags.NoPCH then
				m.element('PrecompiledHeader', condition, 'Create')
			elseif filecfg.flags.NoPCH then
				m.element('PrecompiledHeader', condition, 'NotUsing')
			end
		else
			if not prjcfg.flags.NoPCH and prjcfg.pchheader then
				m.element("PrecompiledHeader", nil, "Use")
				m.precompiledHeaderFile(prjcfg.pchheader, prjcfg)
			else
				m.element("PrecompiledHeader", nil, "NotUsing")
			end
		end
	end


	function m.preprocessorDefinitions(cfg, defines, escapeQuotes, condition)
		if #defines > 0 then
			defines = table.concat(defines, ";")
			if escapeQuotes then
				defines = defines:gsub('"', '\\"')
			end
			defines = defines .. ";%%(PreprocessorDefinitions)"
			m.element('PreprocessorDefinitions', condition, defines)
		end
	end


	function m.undefinePreprocessorDefinitions(cfg, undefines, escapeQuotes, condition)
		if #undefines > 0 then
			undefines = table.concat(undefines, ";")
			if escapeQuotes then
				undefines = undefines:gsub('"', '\\"')
			end
			undefines = undefines .. ";%%(UndefinePreprocessorDefinitions)"
			m.element('UndefinePreprocessorDefinitions', condition, undefines)
		end
	end

	local function getSymbolsPathRelative(cfg)
		if cfg.symbolspath and cfg.symbols ~= p.OFF and cfg.debugformat ~= "c7" then
			return p.project.getrelative(cfg.project, cfg.symbolspath)
		else
			return nil
		end
	end

	function m.programDatabaseFile(cfg)
		local value = getSymbolsPathRelative(cfg)

		if value then
			m.element("ProgramDatabaseFile", nil, value)
		end
	end

	function m.programDatabaseFileName(cfg)
		local value = getSymbolsPathRelative(cfg)

		if value then
			m.element("ProgramDataBaseFileName", nil, value)
		end
	end


	function m.projectGuid(prj)
		m.element("ProjectGuid", nil, "{%s}", prj.uuid)
	end


	function m.projectName(prj)
		if prj.name ~= prj.filename then
			m.element("ProjectName", nil, "%s", prj.name)
		end
	end


	function m.propertyGroup(cfg, label)
		local cond
		if cfg then
			cond = string.format(' %s', m.condition(cfg))
		end

		if label then
			label = string.format(' Label="%s"', label)
		end

		p.push('<PropertyGroup%s%s>', cond or "", label or "")
	end



	function m.propertySheets(cfg)
		p.push('<ImportGroup Label="PropertySheets" %s>', m.condition(cfg))
		p.w('<Import Project="$(UserRootDir)\\Microsoft.Cpp.$(Platform).user.props" Condition="exists(\'$(UserRootDir)\\Microsoft.Cpp.$(Platform).user.props\')" Label="LocalAppDataPlatform" />')
		p.pop('</ImportGroup>')
	end


	function m.propertySheetGroup(prj)
		for cfg in project.eachconfig(prj) do
			m.propertySheets(cfg)
		end
	end


	function m.referenceCopyLocalSatelliteAssemblies(prj, ref)
		m.element("CopyLocalSatelliteAssemblies", nil, "false")
	end


	function m.referenceLinkLibraryDependencies(prj, ref)
		m.element("LinkLibraryDependencies", nil, "true")
	end


	function m.referenceOutputAssembly(prj, ref)
		m.element("ReferenceOutputAssembly", nil, "true")
	end


	function m.referencePrivate(prj, ref)
		m.element("Private", nil, "true")
	end


	function m.referenceProject(prj, ref)
		m.element("Project", nil, "{%s}", ref.uuid)
	end


	function m.referenceUseLibraryDependences(prj, ref)
		m.element("UseLibraryDependencyInputs", nil, "false")
	end


	function m.resourceAdditionalIncludeDirectories(cfg)
		m.additionalIncludeDirectories(cfg, table.join(cfg.includedirs, cfg.resincludedirs))
	end


	function m.resourcePreprocessorDefinitions(cfg)
		local defines = table.join(cfg.defines, cfg.resdefines)
		if cfg.exceptionhandling == p.OFF then
			table.insert(defines, "_HAS_EXCEPTIONS=0")
		end
		m.preprocessorDefinitions(cfg, defines, true)
	end


	function m.runtimeLibrary(cfg)
		local runtimes = {
			StaticDebug   = "MultiThreadedDebug",
			StaticRelease = "MultiThreaded",
			SharedDebug = "MultiThreadedDebugDLL",
			SharedRelease = "MultiThreadedDLL"
		}
		local runtime = config.getruntime(cfg)
		if runtime then
			m.element("RuntimeLibrary", nil, runtimes[runtime])
		end
	end

	function m.callingConvention(cfg)
		if cfg.callingconvention then
			m.element("CallingConvention", nil, cfg.callingconvention)
		end
	end

	function m.runtimeTypeInfo(cfg, condition)
		if cfg.rtti == p.OFF and ((not cfg.clr) or cfg.clr == p.OFF) then
			m.element("RuntimeTypeInfo", condition, "false")
		elseif cfg.rtti == p.ON then
			m.element("RuntimeTypeInfo", condition, "true")
		end
	end

	function m.bufferSecurityCheck(cfg)
		local tool, toolVersion = p.config.toolset(cfg)
		if cfg.flags.NoBufferSecurityCheck or (toolVersion and toolVersion:startswith("LLVM-vs")) then
			m.element("BufferSecurityCheck", nil, "false")
		end
	end

	function m.stringPooling(cfg)
		if cfg.stringpooling ~= nil then
			if cfg.stringpooling then
				m.element("StringPooling", nil, "true")
			else
				m.element("StringPooling", nil, "false")
			end
		elseif config.isOptimizedBuild(cfg) then
			m.element("StringPooling", nil, "true")
		end
	end


	function m.subSystem(cfg)
		local subsystem = iif(cfg.kind == p.CONSOLEAPP, "Console", "Windows")
		m.element("SubSystem", nil, subsystem)
	end


	function m.targetExt(cfg)
		local ext = cfg.buildtarget.extension
		if ext ~= "" then
			m.element("TargetExt", nil, "%s", ext)
		else
			p.w('<TargetExt>')
			p.w('</TargetExt>')
		end
	end


	function m.targetMachine(cfg)
		-- If a static library project contains a resource file, VS will choke with
		-- "LINK : warning LNK4068: /MACHINE not specified; defaulting to X86"
		local targetmachine = {
			x86 = "MachineX86",
			x86_64 = "MachineX64",
		}
		if cfg.kind == p.STATICLIB and config.hasFile(cfg, path.isresourcefile) then
			local value = targetmachine[cfg.architecture]
			if value ~= nil then
				m.element("TargetMachine", nil, '%s', value)
			end
		end
	end


	function m.targetName(cfg)
		m.element("TargetName", nil, "%s%s", cfg.buildtarget.prefix, cfg.buildtarget.basename)
	end


	function m.latestTargetPlatformVersion(prj)
		-- See https://developercommunity.visualstudio.com/content/problem/140294/windowstargetplatformversion-makes-it-impossible-t.html
		if _ACTION == "vs2017" then
			m.element("LatestTargetPlatformVersion", nil, "$([Microsoft.Build.Utilities.ToolLocationHelper]::GetLatestSDKTargetPlatformVersion('Windows', '10.0'))")
		end
	end


	function m.windowsTargetPlatformVersion(prj, cfg)
		if _ACTION < "vs2015" then
			return
		end

		local target = cfg or prj
		local version = project.systemversion(target)

		-- if this is a config, only emit if different from project
		if cfg then
			local prjVersion = project.systemversion(prj)
			if not prjVersion or version == prjVersion then
				return
			end
		end

		-- See https://developercommunity.visualstudio.com/content/problem/140294/windowstargetplatformversion-makes-it-impossible-t.html
		if version == "latest" then
			if _ACTION == "vs2015" then
				version = nil   -- SDK v10 is not supported by VS2015
			elseif _ACTION == "vs2017" then
				version = "$(LatestTargetPlatformVersion)"
			else
				version = "10.0"
			end
		end

		if version then
			m.element("WindowsTargetPlatformVersion", nil, version)
		end
	end


	function m.xpDeprecationWarning(prj, cfg)
		if cfg.toolset == "msc-v141_xp" then
			m.element("XPDeprecationWarning", nil, "false")
		end
	end


	function m.preferredToolArchitecture(prj)
		if _ACTION >= "vs2013" then
			if prj.preferredtoolarchitecture == p.X86_64 then
				m.element("PreferredToolArchitecture", nil, 'x64')
			elseif prj.preferredtoolarchitecture == p.X86 then
				m.element("PreferredToolArchitecture", nil, 'x86')
			end
		else
			if prj.preferredtoolarchitecture == p.X86_64 then
				m.element("UseNativeEnvironment", nil, 'true')
			end
		end
	end


	function m.treatLinkerWarningAsErrors(cfg)
		if cfg.flags.FatalLinkWarnings then
			local el = iif(cfg.kind == p.STATICLIB, "Lib", "Linker")
			m.element("Treat" .. el .. "WarningAsErrors", nil, "true")
		end
	end


	function m.treatWChar_tAsBuiltInType(cfg)
		local map = { On = "true", Off = "false" }
		local value = map[cfg.nativewchar]
		if value then
			m.element("TreatWChar_tAsBuiltInType", nil, value)
		end
	end


	function m.treatWarningAsError(cfg)
		if cfg.flags.FatalCompileWarnings and cfg.warnings ~= p.OFF then
			m.element("TreatWarningAsError", nil, "true")
		end
	end


	function m.disableSpecificWarnings(cfg, condition)
		if #cfg.disablewarnings > 0 then
			local warnings = table.concat(cfg.disablewarnings, ";")
			warnings = warnings .. ";%%(DisableSpecificWarnings)"
			m.element('DisableSpecificWarnings', condition, warnings)
		end
	end


	function m.treatSpecificWarningsAsErrors(cfg, condition)
		if #cfg.fatalwarnings > 0 then
			local fatal = table.concat(cfg.fatalwarnings, ";")
			fatal = fatal .. ";%%(TreatSpecificWarningsAsErrors)"
			m.element('TreatSpecificWarningsAsErrors', condition, fatal)
		end
	end


	function m.useDebugLibraries(cfg)
		local runtime = config.getruntime(cfg) or iif(config.isDebugBuild(cfg), "Debug", "Release")
		m.element("UseDebugLibraries", nil, tostring(runtime:endswith("Debug")))
	end


	function m.useOfMfc(cfg)
		if cfg.flags.MFC then
			m.element("UseOfMfc", nil, iif(cfg.staticruntime == "On", "Static", "Dynamic"))
		end
	end

	function m.useOfAtl(cfg)
		if cfg.atl then
			m.element("UseOfATL", nil, cfg.atl)
		end
	end



	function m.userMacros(cfg)
		p.w('<PropertyGroup Label="UserMacros" />')
	end


	function m.warningLevel(cfg)
		local map = { Off = "TurnOffAllWarnings", High = "Level4", Extra = "Level4", Everything = "EnableAllWarnings" }
		m.element("WarningLevel", nil, map[cfg.warnings] or "Level3")
	end


	function m.warningLevelFile(cfg, condition)
		local map = { Off = "TurnOffAllWarnings", High = "Level4", Extra = "Level4", Everything = "EnableAllWarnings" }
		if cfg.warnings then
			m.element("WarningLevel", condition, map[cfg.warnings] or "Level3")
		end
	end


	function m.xmlDeclaration()
		p.xmlUtf8()
	end

	-- Fx Functions
	--------------------------------------------------------------------------------------------------------------
	--------------------------------------------------------------------------------------------------------------

	function m.fxCompilePreprocessorDefinition(cfg, condition)
		if cfg.shaderdefines and #cfg.shaderdefines > 0 then
			local shaderdefines = table.concat(cfg.shaderdefines, ";")

			shaderdefines = shaderdefines .. ";%%(PreprocessorDefinitions)"
			m.element('PreprocessorDefinitions', condition, shaderdefines)
		end
	end

	function m.fxCompileAdditionalIncludeDirs(cfg, condition)
		if cfg.shaderincludedirs and #cfg.shaderincludedirs > 0 then
			local dirs = vstudio.path(cfg, cfg.shaderincludedirs)
			m.element('AdditionalIncludeDirectories', condition, "%s;%%(AdditionalIncludeDirectories)", table.concat(dirs, ";"))
		end
	end

	function m.fxCompileShaderType(cfg, condition)
		if cfg.shadertype then
			m.element("ShaderType", condition, cfg.shadertype)
		end
	end


	function m.fxCompileShaderModel(cfg, condition)
		if cfg.shadermodel then
			m.element("ShaderModel", condition, cfg.shadermodel)
		end
	end


	function m.fxCompileShaderEntry(cfg, condition)
		if cfg.shaderentry then
			m.element("EntryPointName", condition, cfg.shaderentry)
		end
	end


	function m.fxCompileShaderVariableName(cfg, condition)
		if cfg.shadervariablename then
			m.element("VariableName", condition, cfg.shadervariablename)
		end
	end


	function m.fxCompileShaderHeaderOutput(cfg, condition)
		if cfg.shaderheaderfileoutput then
			m.element("HeaderFileOutput", condition, cfg.shaderheaderfileoutput)
		end
	end


	function m.fxCompileShaderObjectOutput(cfg, condition)
		if cfg.shaderobjectfileoutput then
			m.element("ObjectFileOutput", condition, cfg.shaderobjectfileoutput)
		end
	end


	function m.fxCompileShaderAssembler(cfg, condition)
		if cfg.shaderassembler then
			m.element("AssemblerOutput", condition, cfg.shaderassembler)
		end
	end


	function m.fxCompileShaderAssemblerOutput(cfg, condition)
		if cfg.shaderassembleroutput then
			m.element("AssemblerOutputFile", condition, cfg.shaderassembleroutput)
		end
	end


	function m.fxCompileShaderAdditionalOptions(cfg, condition)
		local opts = cfg.shaderoptions
		if #opts > 0 then
			opts = table.concat(opts, " ")
			m.element("AdditionalOptions", condition, '%s %%(AdditionalOptions)', opts)
		end
	end


---------------------------------------------------------------------------
--
-- Support functions
--
---------------------------------------------------------------------------

--
-- Format and return a Visual Studio Condition attribute.
--

	function m.conditionFromConfigText(cfgText)
		return string.format('Condition="\'$(Configuration)|$(Platform)\'==\'%s\'"', p.esc(cfgText))
	end

	function m.condition(cfg)
		return m.conditionFromConfigText(vstudio.projectConfig(cfg))
	end


--
-- Output an individual project XML element, with an optional configuration
-- condition.
--
-- @param depth
--    How much to indent the element.
-- @param name
--    The element name.
-- @param condition
--    An optional configuration condition, formatted with vc2010.condition().
-- @param value
--    The element value, which may contain printf formatting tokens.
-- @param ...
--    Optional additional arguments to satisfy any tokens in the value.
--

	function m.element(name, condition, value, ...)
		local arg = {...}
		if select('#',...) == 0 then
			value = p.esc(value)
		else
			for i = 1, #arg do
				arg[i] = p.esc(arg[i])
			end
		end

		if condition then
			--defer output
			local element = {}
			element.name = name
			element.condition = condition
			element.value = value
			element.args = arg
			if ... then
				if value == '%s' then
					element.setting = table.concat(arg)
				else
					element.setting = value .. table.concat(arg)
				end
			else
				element.setting = element.value
			end
			table.insert(m.conditionalElements, element)
		else
			local format = string.format('<%s>%s</%s>', name, value, name)
			p.w(format, table.unpack(arg))
		end
	end
