LFRic operators

An LFRic operator is a data structure that maps fields from one function space to another. Like fields, operators for 64-bit and 32-bit reals are supported.

To initialise an operator that maps from function space fs_source to fs_target:

type(operator_real64_type) :: my_operator

call my_operator%initialise(fs_target, fs_source)

Operators can be copied by using the deep_copy method:

operator_copy = my_operator%deep_copy()

All application of operators to fields is done by kernel.

Operator proxies

Like fields, to impose the separation of concerns between algorithms and kernels, the data in an operator is hidden from the operator object and must be accessed using a proxy object.

The principle of operator proxies is largely the same as for field proxies. But while there are limited circumstances where a developer may need to access field data outside of the PSy layer, the likelihood of doing this for operators is minuscule. For this reason, this section on user documentation will not go into further details.