updated documentation about functions, introducted += operator with a Php::Value on the right side, and an integral variable on the left

1 files changed, 18 insertions, 0 deletions

diff --git a/include/value.h b/include/value.h
index d0079dc..b732616 100644
--- a/include/value.h
+++ b/include/value.h
@@ -684,6 +684,24 @@ protected:
 std::ostream &operator<<(std::ostream &stream, const Value &value);
 
 /**
+ *  Custom +=, -=, *=, /=, &= operators, to update integral types with a Php::Value
+ * 
+ *  This code looks complicated, it ensures that the operators are only
+ *  overloaded for integral types (int, bool, etc) - and not for complex types
+ *  (arrays, objects, etc)
+ */
+template <typename X, typename std::enable_if<std::is_integral<X>::value>::type* = nullptr> 
+X &operator+=(X &x, const Php::Value &value) { return x += (X)value; }
+template <typename X, typename std::enable_if<std::is_integral<X>::value>::type* = nullptr> 
+X &operator-=(X &x, const Php::Value &value) { return x -= (X)value; }
+template <typename X, typename std::enable_if<std::is_integral<X>::value>::type* = nullptr> 
+X &operator*=(X &x, const Php::Value &value) { return x *= (X)value; }
+template <typename X, typename std::enable_if<std::is_integral<X>::value>::type* = nullptr> 
+X &operator/=(X &x, const Php::Value &value) { return x /= (X)value; }
+template <typename X, typename std::enable_if<std::is_integral<X>::value>::type* = nullptr> 
+X &operator%=(X &x, const Php::Value &value) { return x %= (X)value; }
+
+/**
  *  End of namespace
  */
 }