add compile-time type system for MPI data/ops

changed milestone to %v2506

added enhancement label

assigned to @andy

• merge-request is only for the top commits, the others are already staged for merging !728 (merged)

Tested differences for the data types.

Linux x86_64:

name="long" sizeof=8 max=<9223372036854775807> is_mpi=1 (2) is_base
name="unsigned long" sizeof=8 max=<18446744073709551615> is_mpi=1 (4) is_base
name="long long" sizeof=8 max=<9223372036854775807> is_mpi=0 (-1) is_alias (2)

MacOS ARM64:

name="long" sizeof=8 max=<9223372036854775807> is_mpi=0 (-1) is_alias (2)
name="unsigned long" sizeof=8 max=<18446744073709551615> is_mpi=0 (-1) is_alias (4)
name="long long" sizeof=8 max=<9223372036854775807> is_mpi=1 (2) is_base

so we have successfully captured the handling of long and long long on both systems - directly or via the aliasing wrapper.

added 13 commits

• 93620d5a...d41c644a - 10 commits from branch develop
• c448ea2a - ENH: add simple handling for point-to-point barriers
• bf60a124 - ENH: add mapping for fundamental and OpenFOAM types -> MPI data types
• dccdb263 - ENH: add UPstreamTraits support to map data types and opcodes

Compare with previous version

marked this merge request as ready

No significant code changes since the review yesterday.

assigned to @kuti and unassigned @andy

@kuti - I went through the changes with Andy yesterday and just did the minor tidying earlier.

approved this merge request

mentioned in commit e3703c76

merged