bslmf_arraytopointer

Macros
#define	bslmf_ArrayToConstPointer   bslmf::ArrayToConstPointer
	This alias is defined for backward compatibility.
#define	bslmf_ArrayToPointer   bslmf::ArrayToPointer
	This alias is defined for backward compatibility.

Detailed Description

Outline

• Purpose
• Classes
• Description
  • Usage

Purpose

Provide a meta-function to convert array types to pointer types.

Classes

• bslmf::ArrayToPointer: convert an array type to a pointer type
• bslmf::ArrayToConstPointer: convert an array type to a const pointer type

See also

bslmf_isarray, bslmf_forwardingtype

Description

This component provides a meta function for converting array types to pointer types. The utility is generally used for in templates that require forwarding or storage of arguments that are passed a arrays(e.g., "string literals"). For non array types, the type is left unmodified. Note that bslmf::ArrayToPointer and bslmf::ArrayToConstPointer retain the CV qualifiers of the original type. In other words, if the original array type was const or volatile, or const volatile, the converted pointer type will also be const, volatile, or const volatile respectively.

When an explicit const pointer pointer type is needed(such as when accepting as argument, then bslmf::ArrayToConstPointer should be used.

Usage

For example:

assert(1 == bsl::is_same<bslmf::ArrayToPointer<int[5]>::Type
                        , int *>::value);
assert(1 == bsl::is_same<bslmf::ArrayToPointer<int *>::Type
                        , int *>::value);
assert(0 == bsl::is_same<bslmf::ArrayToPointer<int (*)[5]>::Type]
                        , int **>::value);

Macro Definition Documentation

bslmf_ArrayToConstPointer

#define bslmf_ArrayToConstPointer   bslmf::ArrayToConstPointer

bslmf_ArrayToPointer

#define bslmf_ArrayToPointer   bslmf::ArrayToPointer