Branches: main, 11.07
Allow mutable variables to be initialised by impure functions.
Also fix bug #223. Make thread.semaphore.init/1 and thread.mvar.init/1
impure, as they should be. They were introduced to be used as mutable
initialisers, which led to the oversight of making them pure.
compiler/make_hlds_passes.m:
compiler/prog_mutable.m:
Modify the generated mutable initialisation predicates such that the
initial value may be the return value of a impure function call.
compiler/purity.m:
Ignore warnings about unnecessary impure annotations on goals in
generated mutable predicates. These would now appear when
a mutable is initialised by a call to a pure function, or
by a constant.
doc/reference_manual.texi:
NEWS:
Document the language change.
library/thread.mvar.m:
library/thread.semaphore.m:
Make thread.semaphore.init/1 and thread.mvar.init/1 impure.
tests/hard_coded/Mmakefile:
tests/hard_coded/mutable_init_impure.exp:
tests/hard_coded/mutable_init_impure.m:
Add test case.
