Move Functor implementation to header for the API.

1 files changed, 37 insertions, 0 deletions

diff --git a/ldid.hpp b/ldid.hpp
index ad85f03..331c4b0 100644
--- a/ldid.hpp
+++ b/ldid.hpp
@@ -8,6 +8,43 @@
 
 namespace ldid {
 
+// I wish Apple cared about providing quality toolchains :/
+
+template <typename Function_>
+class Functor;
+
+template <typename Type_, typename... Args_>
+class Functor<Type_ (Args_...)> {
+  public:
+    virtual Type_ operator ()(Args_... args) const = 0;
+};
+
+template <typename Function_>
+class FunctorImpl;
+
+template <typename Value_, typename Type_, typename... Args_>
+class FunctorImpl<Type_ (Value_::*)(Args_...) const> :
+    public Functor<Type_ (Args_...)>
+{
+  private:
+    const Value_ *value_;
+
+  public:
+    FunctorImpl(const Value_ &value) :
+        value_(&value)
+    {
+    }
+
+    virtual Type_ operator ()(Args_... args) const {
+        return (*value_)(args...);
+    }
+};
+
+template <typename Function_>
+FunctorImpl<decltype(&Function_::operator())> fun(const Function_ &value) {
+    return value;
+}
+
 typedef std::map<uint32_t, std::string> Slots;
 
 void Sign(void *idata, size_t isize, std::streambuf &output, const std::string &name, const std::string &entitlements, const std::string &key, const Slots &slots);