Estimated hours taken: 12
Allow functions to be declared by supplying the determinism but not the
modes (we assume the default modes).
compiler/make_hlds.m:
Assume default modes if determinism is declared without modes
in the :- func declaration.
compiler/prog_io.m:
Don't give an error message for determinism without modes for
function.
compiler/prog_io_goal.m:
Update documentation to reflect default mode syntax.
Assume default modes if determinism is declared without modes
in lambda expressions.
compiler/prog_util.m:
Mention that declaring modes for some but not all of the
arguments of a function will be noticed in prog_io, so shouldn't
be a concern in this code.
doc/reference_manual.texi:
Document the new syntax.
tests/valid/Mmakefile:
tests/valid/func_default_modes.m:
A test case for the new syntax.
