Add rudimentary support for the Apple Swift language with Xcode

Allow the `Swift` language to be enabled with the Xcode generator for
Xcode >= 6.1.  Reject it on other generators and with older Xcode
versions.  Since Apple is the only vendor implementing the language
right now, the compiler id can be just `Apple`.

5 files changed, 23 insertions, 0 deletions

diff --git a/Tests/SwiftMix/CMain.c b/Tests/SwiftMix/CMain.c
new file mode 100644
index 0000000..13e2f8c
--- /dev/null
+++ b/Tests/SwiftMix/CMain.c
@@ -0,0 +1,4 @@
+extern int ObjCMain(int argc, char const* const argv[]);
+int main(int argc, char* argv[]) {
+  return ObjCMain(argc, argv);
+}
diff --git a/Tests/SwiftMix/CMakeLists.txt b/Tests/SwiftMix/CMakeLists.txt
new file mode 100644
index 0000000..5e50470
--- /dev/null
+++ b/Tests/SwiftMix/CMakeLists.txt
@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.3)
+project(SwiftMix C Swift)
+
+add_executable(SwiftMix CMain.c ObjCMain.m SwiftMain.swift ObjC-Swift.h)
+set_property(TARGET SwiftMix PROPERTY XCODE_ATTRIBUTE_SWIFT_OBJC_BRIDGING_HEADER "ObjC-Swift.h")
diff --git a/Tests/SwiftMix/ObjC-Swift.h b/Tests/SwiftMix/ObjC-Swift.h
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/Tests/SwiftMix/ObjC-Swift.h
diff --git a/Tests/SwiftMix/ObjCMain.m b/Tests/SwiftMix/ObjCMain.m
new file mode 100644
index 0000000..7fa90ae
--- /dev/null
+++ b/Tests/SwiftMix/ObjCMain.m
@@ -0,0 +1,4 @@
+#import "SwiftMix-Swift.h"
+int ObjCMain(int argc, char const* const argv[]) {
+  return [SwiftMainClass SwiftMain:argc argv:argv];
+}
diff --git a/Tests/SwiftMix/SwiftMain.swift b/Tests/SwiftMix/SwiftMain.swift
new file mode 100644
index 0000000..9af9883
--- /dev/null
+++ b/Tests/SwiftMix/SwiftMain.swift
@@ -0,0 +1,10 @@
+@objc class SwiftMainClass {
+  class func SwiftMain(argc:Int, argv:UnsafePointer<UnsafePointer<CChar>>) -> Int32 {
+    println("argc: \(argc)")
+    for (var i = 0; i < argc; ++i) {
+      var argi = String.fromCString(argv[i])
+      println("arg[\(i)]: \(argi)");
+    }
+    return 0;
+  }
+}