std: add event support in the include random

alib2std/src/extensions/random.cpp

@@ -2,7 +2,7 @@
 namespace ext {
-	std::random_device & random_devices::random = getRandom ( );
-	random_devices::semirandom_device & random_devices::semirandom = getSemirandom ( );
+std::random_device & random_devices::random = getRandom ( );
+random_devices::semirandom_device & random_devices::semirandom = getSemirandom ( );
 } /* namespace ext */

alib2std/src/extensions/random.hpp

@@ -143,5 +143,36 @@ public:
 };
-} /* namespace ext */
+class uniform_unsigned_event {
+	unsigned m_probability;
+
+	static constexpr unsigned PROBABILITY_MIN = 0;
+	static constexpr unsigned PROBABILITY_MAX = 100;
+public:
+	uniform_unsigned_event ( unsigned probability ) : m_probability ( probability ) {
+	}
+
+	template< class Generator >
+	bool operator ( ) ( Generator & g ) const {
+		static std::uniform_int_distribution < unsigned > generator ( PROBABILITY_MIN, PROBABILITY_MAX - 1 );
+		return generator ( g ) < m_probability;
+	}
+};
+
+class uniform_real_event {
+	double m_probability;
+	static constexpr double PROBABILITY_MIN = 0.;
+	static constexpr double PROBABILITY_MAX = 1.;
+public:
+	uniform_real_event ( double probability ) : m_probability ( probability ) {
+	}
+
+	template< class Generator >
+	bool operator ( ) ( Generator & g ) const {
+		static std::uniform_real_distribution < double > generator ( PROBABILITY_MIN, PROBABILITY_MAX );
+		return generator ( g ) < m_probability;
+	}
+};
+
+} /* namespace ext */