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https://github.com/Mercury-Language/mercury.git
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03d6c5f436
compiler/modecheck_call.m:
As above. This fixes Mantis bug #529.
compiler/options.m:
Allow configure to test whether the bug is fixed, so we can delete
any now-redundant explicit higher order insts in mode declarations.
tests/hard_coded/exist_cons_ho_arg.{m,exp}:
A test case for the bug. This is a strengthened version of the
Mantis test case.
tests/hard_coded/Mmakefile:
Enable the new test case.
70 lines
1.7 KiB
Mathematica
70 lines
1.7 KiB
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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% This test case checks whether the mode checker can get higher-order inst
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% info out of types, such as the type of the second argument of the command
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% function symbol below, when they are not specified as parts of modes.
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%
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:- module exist_cons_ho_arg.
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:- interface.
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:- import_module io.
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:- pred main(io::di, io::uo) is det.
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%---------------------------------------------------------------------------%
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:- implementation.
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:- import_module int.
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:- import_module string.
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main(!IO) :-
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test_foo(!IO),
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test_bar(!IO).
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%---------------------------------------------------------------------------%
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:- type command
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---> some [T] command(T, pred(T::in, T::out) is det).
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:- pred test_foo(io::di, io::uo) is det.
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test_foo(!IO) :-
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Command = foo_command,
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Command = command(X, Pred),
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Pred(X, Y),
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io.write_line(Y, !IO).
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:- pred test_bar(io::di, io::uo) is det.
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test_bar(!IO) :-
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Command = bar_command,
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Command = command(X, Pred),
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Pred(X, Y),
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io.write_line(Y, !IO).
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%---------------------------------------------------------------------------%
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:- pred foo_pred(int::in, int::out) is det.
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foo_pred(N, N + 1).
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:- func foo_command = command.
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foo_command = 'new command'(41, foo_pred).
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%---------------------------------------------------------------------------%
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:- pred bar_pred(string::in, string::out) is det.
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bar_pred(S, S ++ S ++ S).
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:- func bar_command = command.
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bar_command = 'new command'("abc", bar_pred).
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%---------------------------------------------------------------------------%
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