Add Cxx test module support

Package.swift

@@ -178,8 +178,7 @@ let openGraphSPITestTarget = Target.testTarget(
     cSettings: sharedCSettings + [
         .headerSearchPath("../../Sources/OpenGraph_SPI"),
     ],
-    swiftSettings: sharedSwiftSettings,
-    linkerSettings: [.linkedFramework("XCTest")]
+    swiftSettings: sharedSwiftSettings + [.interoperabilityMode(.Cxx)]
 )
 let openGraphShimsTestTarget = Target.testTarget(
     name: "OpenGraphShimsTests",

Sources/OpenGraph_SPI/Data/ptr.hpp

@@ -9,7 +9,7 @@
 #define ptr_hpp
 
 #include "OGBase.h"
-#include "table.hpp"
+#include "OpenGraphCxx/table.hpp"
 #include <bitset>
 #include "page_const.hpp"
 

Sources/OpenGraph_SPI/Data/table.cpp

@@ -6,7 +6,7 @@
 //  Status: WIP
 //  Modified from https://github.com/jcmosc/Compute/blob/0a6b21a4cdeb9bbdd95e7e914c4e18bed37a2456/Sources/ComputeCxx/Data/Table.cpp [MIT License]
 
-#include "table.hpp"
+#include <OpenGraphCxx/table.hpp>
 #include "page.hpp"
 #include "page_const.hpp"
 #include "zone.hpp"

Sources/OpenGraph_SPI/Data/zone.cpp

@@ -3,7 +3,7 @@
 //  OpenGraph_SPI
 
 #include "zone.hpp"
-#include "table.hpp"
+#include <OpenGraphCxx/table.hpp>
 #include "page.hpp"
 #include "../Util/assert.hpp"
 #if OG_TARGET_OS_DARWIN

Sources/OpenGraph_SPI/include/module.modulemap

@@ -0,0 +1,11 @@
+module OpenGraph_SPI {
+    header "OpenGraph-umbrella.h"
+    export *
+}
+
+// TODO: Change to module OpenGraphCxx and OpenGraphCxx.Internal
+module OpenGraph_SPI.Cxx {
+    requires cplusplus
+    umbrella "OpenGraphCxx"
+    export *
+}

Tests/OpenGraph_SPITests/OpenGraph_SPITests.swift

@@ -0,0 +1,15 @@
+//
+//  OpenGraph_SPITests.swift
+//  OpenGraph
+
+import OpenGraph_SPI.Cxx
+import Testing
+
+struct OpenGraph_SPITests {
+    #if canImport(Darwin) // table() is not implemented on Linux yet.
+    @Test
+    func table() {
+        OG.data.table.ensure_shared()
+    }
+    #endif
+}