MUTABLE_CAST

MUTABLE_CAST(type,exp) (const_cast<type>(exp))
MUTABLE_CAST(type,exp) ((type)(exp))
MUTABLE_CAST(type,exp) (exp)

Support

Supported from 5.0

Description

Mutable cast — deprecated. See __MUTABLE.

This macro, together with the related macro, __MUTABLE, allows code to be written that can easily be recompiled to use the mutable keyword, at such a time when all compilers support this keyword. Currently, the macro expands to a suitable cast, that simulates the functionality that mutable makes available.

If __VC32__ is defined (i.e. Microsoft Visual C++ is the compiler), then the macro is defined as follows:

#if defined(__NO_MUTABLE_KEYWORD)#define MUTABLE_CAST(type,exp) (const_cast<type>(exp))#else#define MUTABLE_CAST(type,exp) (exp)

For GCC,

#if defined(__NO_MUTABLE_KEYWORD)#define MUTABLE_CAST(type,exp) ((type)(exp))#else#define MUTABLE_CAST(type,exp) (exp)#endif

As __NO_MUTABLE_KEYWORD is defined in e32def.h, the macro expands to a cast.

Parameters

type destination type of cast exp expression to cast

See also:

• Using MUTABLE_CAST macro