5.8.2  Mapper Identifiers and mapper Modifiers

Modifiers

Clauses

from

map

to

Mapper identifiers can be used to uniquely identify the mapper used in a map or data-motion clause through a mapper modifier, which is a unique, complex modifier. A declare mapper directive defines a mapper identifier that can later be specified in a mapper modifier as its modifier-parameter-specification. Each mapper identifier is a base-language identifier or default where default is the default mapper for all types.

A non-structure type T has a predefined default mapper that is defined as if by the following declare mapper directive:

 
#pragma omp declare mapper(T v) map(tofrom: v)
  

 
!$omp declare mapper(T :: v) map(tofrom: v)
  

A structure type T has a predefined default mapper that is defined as if by a declare mapper directive that specifies v in a map clause with the alloc map-type and each structure element of v in a map clause with the tofrom map-type.

A declare mapper directive that uses the default mapper identifier overrides the predefined default mapper for the given type, making it the default mapper for variables of that type.

Cross References

• from clause, see Section 5.9.2
• map clause, see Section 5.8.3
• to clause, see Section 5.9.1