Added the Php::Function class. This is an extension to the Php::Value class that can be used if you want to assign a std::function object to a Value. This is useful if you want to pass a C++ lambda to a PHP userspace function

1 files changed, 73 insertions, 0 deletions

diff --git a/include/function.h b/include/function.h
new file mode 100644
index 0000000..7073f84
--- /dev/null
+++ b/include/function.h
@@ -0,0 +1,73 @@
+/**
+ *  Function.h
+ * 
+ *  Small extension to the Value class that allows a value to be 
+ *  constructed with a std::function. 
+ * 
+ *  If you want to assign a std::function to a value, the following
+ *  piece of code won't work:
+ * 
+ *      Php::Value value([]() { .... });
+ * 
+ *  Because the passed in function would match with many of the possible
+ *  Value constructors. For that reason we have created a small and 
+ *  simple Function class that can be used instead:
+ * 
+ *      Php::Function valu([]() { .... });
+ * 
+ *  A Php::Function is an extended Php::Value object, so can be used
+ *  in place of Php::Values all the time. The only difference is that
+ *  it has a different constructor
+ * 
+ *  @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
+ *  @copyright 2015 Copernica BV
+ */
+
+/**
+ *  Set up namespace
+ */
+namespace Php {
+    
+/**
+ *  Class definition
+ */
+class Function : public Value
+{
+public:
+    /**
+     *  Constructor to wrap a function that takes parameters
+     *  @param  function        The C++ function to be wrapped
+     */
+    Function(const std::function<Value(Parameters&)> &function);
+    
+    /**
+     *  Constructor to wrap a function that does not accept parameters
+     *  @param  function        The C++ function to be wrapped
+     */
+    Function(const std::function<Value()> &function) : Function([function](Parameters &params) -> Value {
+        
+        // call original function, forget about the parameters
+        return function();
+        
+    }) {}
+    
+    /**
+     *  Destructor
+     */
+    virtual ~Function() {}
+
+private:
+    /**
+     *  Retrieve the class entry of the _functor class
+     *  @return _zend_class_entry
+     */
+    static struct _zend_class_entry *entry();
+
+
+};
+
+/**
+ *  End namespace
+ */
+}
+