medfall

commit 8a9d2e56c0408658c3771741731b0cc7fce99f65
parent 975fa20da6521f4bbb7f3c6a9707007d0a4bf15c
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Thu Dec 22 23:01:16 +0200

ConstArrayIterator and array visitors

Diffstat:
array.h
 | 
42
++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+), 0 deletions(-)
diff --git a/array.h b/array.h
@@ -28,6 +28,28 @@ private:
 };
 
 template< typename T >
+class ConstArrayIterator {
+public:
+	ConstArrayIterator( T * ptr ) {
+		cursor = ptr;
+	}
+
+	const T & operator*() {
+		return *cursor;
+	}
+
+	bool operator!=( ConstArrayIterator< T > other ) {
+		return cursor != other.cursor;
+	}
+
+	void operator++() {
+		cursor++;
+	}
+private:
+	T * cursor;
+};
+
+template< typename T >
 class array {
 public:
 	array() {
@@ -84,6 +106,14 @@ public:
 		return ArrayIterator< T >( elems + n );
 	}
 
+	ConstArrayIterator< T > begin() const {
+		return ConstArrayIterator< T >( elems );
+	}
+
+	ConstArrayIterator< T > end() const {
+		return ConstArrayIterator< T >( elems + n );
+	}
+
 	size_t n;
 
 protected:
@@ -146,4 +176,16 @@ private:
 	T elems_memory[ N ];
 };
 
+template< typename T, typename F >
+inline void visit( array< T > & a, F f ) {
+	f( a.n );
+	for( T & x : a ) f( x );
+}
+
+template< typename T, typename F >
+inline void visit( const array< T > & a, F f ) {
+	f( a.n );
+	for( const T & x : a ) f( x );
+}
+
 #endif // _ARRAY_H_