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502ea379e4
compiler/det_report.m:
Generate an error message if a require_complete_switch [X] scope
is wrapped around a goal that is not a switch on X.
doc/reference_manual.texi:
Update the reference manual to document this change. Also fix an
old documentation problem: require_complete_switch scopes do NOT
require covering all the function symbols in the type of the
switch-on variable if the switched-on variable's inst says that
it cannot be bound to some of them.
compiler/hlds_goal.m:
Update the comment on the require_complete_switch scope
in the same way.
NEWS:
Announce the change.
tests/warnings/bug257.{m,exp}:
tests/invalid/bug257.{m,err_exp}:
tests/warnings/Mmakefile:
tests/invalid/Mmakefile:
For the bug257.m test case, which has a require_complete_switch [X] scope
around a goal that is not a switch on X, expect the error message
we now generate, not the old warning.
Since the compilation of bug257.m now fails, move it from warnings
to invalid.
tests/valid/Mmakefile:
Disable the bug257b.m test case, which also had a
require_complete_switch [X] scope around a goal that was not a switch on X.
tests/valid/bug257b.m:
Document that this test case is now disabled, and why.
35 lines
984 B
Mathematica
35 lines
984 B
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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%
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% Don't emit an erroneous warning about the variable that is the subject
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% of a require_complete_switch scope not occurring in the sub-goal if
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% the sub-goal in question is not a switch and the variable in question
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% does not occur in the non-local set of the sub-goal.
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% (See also tests/warnings/bug257b.m.)
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%
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% This test is now disabled, since we now generate an error when a
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% require_complete_switch scope is wrapped around a goal that is not
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% a switch on the named variable.
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:- module bug257b.
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:- interface.
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:- import_module io.
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:- type xyz
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---> x
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; y
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; z.
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:- pred oops(xyz::in, int::out, io::di, io::uo) is det.
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:- implementation.
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oops(_G, N, !IO) :-
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require_complete_switch [Gee] (
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Gee = 123,
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io.write(Gee, !IO),
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N = 3
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).
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