ANY_SINGLETON macros

Macros to reduce boilerplate for declaring/defining static runtime data. More...

Macros
#define	ANY_SINGLETON_DECLARE(export_, name, ...)
	Declare access to a singleton object in a header file.
#define	ANY_SINGLETON(namespace_, name, ...)
	Define a singleton object in a source file.

Detailed Description

Macros to reduce boilerplate for declaring/defining static runtime data.

To enable some dynamic functionality (crosscast, open dispatch) there must be some static data holding information to perform these operations. Extra care must be taken in a DLL scenario.

To reduce boilerplate code, Any++ supplies these macros.

Macro Definition Documentation

ANY_SINGLETON

#define ANY_SINGLETON	(		namespace_,
			name,
			... )

Value:

namespace_::name##_t& namespace_::get_##name() { \
  static name##_t singleton_{__VA_ARGS__};       \
  return singleton_;                             \
};

Define a singleton object in a source file.

Parameters

namespace_	The namespace for the singleton.
name	Name of the singleton.
__VA_ARGS__	Parameters for the singleton constructor.

See also ANY_SINGLETON_DECLARE.

Examples

21_Tree_any_borrow_as.cpp.

ANY_SINGLETON_DECLARE

#define ANY_SINGLETON_DECLARE	(		export_,
			name,
			... )

Value:

using name##_t = __VA_ARGS__;                   \
export_ extern name##_t& get_##name();          \
static inline name##_t& name = get_##name();

Declare access to a singleton object in a header file.

Parameters

export_	To supply an export macro in a DLL scenario.
name	Name of the singleton.
__VA_ARGS__	Type of the singleton object.

This macro should reside inside the namespace you wish the singleton to reside. See also ANY_SINGLETON.

Examples

21_Tree_any_borrow_as.cpp.