[vcpkg] Refactored to simplify BuildPolicies into BuildPolicy.

Restrict policy consumers to a simpler interface than std::map.
Rename vcpkg::getMachineType -> vcpkg::to_machine_type.

1 files changed, 51 insertions, 0 deletions

diff --git a/toolsrc/src/vcpkg_Build_BuildPolicy.cpp b/toolsrc/src/vcpkg_Build_BuildPolicy.cpp
new file mode 100644
index 000000000..e75e176a2
--- /dev/null
+++ b/toolsrc/src/vcpkg_Build_BuildPolicy.cpp
@@ -0,0 +1,51 @@
+#include "pch.h"
+
+#include "vcpkg_Build.h"
+#include "vcpkg_Checks.h"
+#include "vcpkg_Enums.h"
+
+namespace vcpkg::Build
+{
+    static const std::string NAME_EMPTY_PACKAGE = "PolicyEmptyPackage";
+    static const std::string NAME_DLLS_WITHOUT_LIBS = "PolicyDLLsWithoutLIBs";
+    static const std::string NAME_ONLY_RELEASE_CRT = "PolicyOnlyReleaseCRT";
+    static const std::string NAME_EMPTY_INCLUDE_FOLDER = "PolicyEmptyIncludeFolder";
+    static const std::string NAME_ALLOW_OBSOLETE_MSVCRT = "PolicyAllowObsoleteMsvcrt";
+
+    Optional<BuildPolicy> to_build_policy(const std::string& s)
+    {
+        if (s == NAME_EMPTY_PACKAGE) return BuildPolicy::EMPTY_PACKAGE;
+        if (s == NAME_DLLS_WITHOUT_LIBS) return BuildPolicy::DLLS_WITHOUT_LIBS;
+        if (s == NAME_ONLY_RELEASE_CRT) return BuildPolicy::ONLY_RELEASE_CRT;
+        if (s == NAME_EMPTY_INCLUDE_FOLDER) return BuildPolicy::EMPTY_INCLUDE_FOLDER;
+        if (s == NAME_ALLOW_OBSOLETE_MSVCRT) return BuildPolicy::ALLOW_OBSOLETE_MSVCRT;
+
+        return nullopt;
+    }
+
+    const std::string& to_string(BuildPolicy policy)
+    {
+        switch (policy)
+        {
+            case BuildPolicy::EMPTY_PACKAGE: return NAME_EMPTY_PACKAGE;
+            case BuildPolicy::DLLS_WITHOUT_LIBS: return NAME_DLLS_WITHOUT_LIBS;
+            case BuildPolicy::ONLY_RELEASE_CRT: return NAME_ONLY_RELEASE_CRT;
+            case BuildPolicy::EMPTY_INCLUDE_FOLDER: return NAME_EMPTY_INCLUDE_FOLDER;
+            case BuildPolicy::ALLOW_OBSOLETE_MSVCRT: return NAME_ALLOW_OBSOLETE_MSVCRT;
+            default: Checks::unreachable(VCPKG_LINE_INFO);
+        }
+    }
+
+    CStringView to_cmake_variable(BuildPolicy policy)
+    {
+        switch (policy)
+        {
+            case BuildPolicy::EMPTY_PACKAGE: return "VCPKG_POLICY_EMPTY_PACKAGE";
+            case BuildPolicy::DLLS_WITHOUT_LIBS: return "VCPKG_POLICY_DLLS_WITHOUT_LIBS";
+            case BuildPolicy::ONLY_RELEASE_CRT: return "VCPKG_POLICY_ONLY_RELEASE_CRT";
+            case BuildPolicy::EMPTY_INCLUDE_FOLDER: return "VCPKG_POLICY_EMPTY_INCLUDE_FOLDER";
+            case BuildPolicy::ALLOW_OBSOLETE_MSVCRT: return "VCPKG_POLICY_ALLOW_OBSOLETE_MSVCRT";
+            default: Checks::unreachable(VCPKG_LINE_INFO);
+        }
+    }
+}