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Implement semantic checks for oisu (order independent state update) pragmas.
compiler/hlds_pred.m:
Record for each procedure whether it implements an operation
on a oisu type, and if yes, what kind of operation.
compiler/hlds_module.m:
Add to module_infos a data structure that lists the oisu pragmas
in the module, and the procedures mentioned in them. These are intended
to be used later during code generation.
compiler/add_pragma.m:
Add such pragmas to the HLDS, after checking whatever properties
can be checked during the creation of the HLDS.
compiler/oisu_check.m:
A new module, whose job it is to check those aspects of oisu pragmas
that can be checked only after other semantics are complete on the
module.
compiler/check_hlds.m:
Add the new module.
compiler/notes/compiler_design.html:
Document the new module.
compiler/mercury_compile_front_end.m:
Invoke the new module.
compiler/error_util.m:
Add the new semantic check as a phase.
compiler/mercury_to_mercury.m:
Fix typos in the code for writing out oisu pragmas.
compiler/prog_io_pragmas.m:
Fix typos in the code for reading in oisu pragmas.
compiler/module_qual.m:
Improve the error messages generated for any problems discovered during
module qualification inside pragmas, by writing out what *kind* of
pragma the problem was discovered in.
compiler/modules.m:
Fix a bug: oisu pragmas *can* appear in module interfaces.
compiler/stratify.m:
Give a predicate a better interface and a name.
compiler/hlds_goal.m:
Remove a duplicate comment.
compiler/make_hlds_passes.m:
Fix formatting.
tests/hard_coded/oisu_check_main.{m,exp}:
tests/hard_coded/oisu_check_db.m:
A new multimodule test case, which uses oisu pragmas correctly.
tests/invalid/oisu_check_add_pragma_errors.{m,err_exp}:
A new test case, which tests add_pragma.m's ability to diagnose
the problems it is supposed to diagnose.
tests/invalid/oisu_check_semantic_errors.{m,err_exp}:
A new test case, which tests oisu_check.m's ability to diagnose
the problems it is supposed to diagnose.
tests/hard_coded/Mmakefile:
tests/invalid/Mmakefile:
Enable the new test cases.
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