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b45b70199b
Estimated hours taken: 30 Branches: main Add a post-processing pass directly after mode checking that tries to transform procedures to avoid intermediate partially instantiated data structures. The Erlang backend in particular cannot handle partially instantiated data structures. compiler/delay_partial_inst.m: New module. compiler/check_hlds.m: Import delay_partial_inst.m compiler/modes.m: Call the delay partial instantiations pass after mode checking succeeds if it is enabled. compiler/options.m: Add a new internal option `--delay-partial-instantiations', disabled by default. compiler/handle_options.m: Make Erlang target imply --delay-partial-instantiations. compiler/notes/compiler_design.html: Mention delay_partial_inst.m tests/hard_coded/Mercury.options: tests/hard_coded/Mmakefile: tests/hard_coded/delay_partial_test.exp: tests/hard_coded/delay_partial_test.m: tests/hard_coded/delay_partial_test2.exp: tests/hard_coded/delay_partial_test2.m: Add test cases for --delay-partial-instantiations. compiler/goal_util.m: Fix a comment.
92 lines
1.7 KiB
Mathematica
92 lines
1.7 KiB
Mathematica
% Test the --delay-partial-instantiations option.
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:- module delay_partial_test.
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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 char.
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:- import_module int.
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%-----------------------------------------------------------------------------%
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:- type t
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---> f(int)
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; g(int, int)
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; h(t, t).
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:- type blah
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---> blah(
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a :: int,
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b :: int,
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c :: char
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).
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main(!IO) :-
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test1(!IO),
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test2(!IO),
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test3(!IO),
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test4(!IO).
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% Test implied mode calls.
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:- pred test1(io::di, io::uo) is det.
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test1(!IO) :-
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(if foo(h(_, _)) then
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io.write_string("implied mode call 1 ok\n", !IO)
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else
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io.write_string("implied mode call 1 bad\n", !IO)
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).
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:- pred test2(io::di, io::uo) is det.
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test2(!IO) :-
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(if foo(g(_, _)) then
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io.write_string("implied mode call 2 bad\n", !IO)
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else
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io.write_string("implied mode call 2 ok\n", !IO)
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).
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% Test constructing things.
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:- pred test3(io::di, io::uo) is det.
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test3(!IO) :-
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Foo ^ a = 42,
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Foo ^ b = 43,
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Foo ^ c = 'x',
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io.print(Foo, !IO),
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io.nl(!IO).
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:- pred test4(io::di, io::uo) is det.
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test4(!IO) :-
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Bar ^ b = Baz ^ b,
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Baz ^ c = X,
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Bar ^ a = Bar ^ b,
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(if foo(f(_)) then
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X = Bar ^ c,
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Bar ^ c = 'x'
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else
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X = 'z',
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Bar ^ c = 'y'
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),
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Baz ^ a = 43,
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Baz ^ b = -42,
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io.print({Bar, Baz}, !IO),
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io.nl(!IO).
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:- pred foo(t::out) is multi.
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:- pragma no_inline(foo/1).
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foo(f(42)).
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foo(h(f(43), g(44, 45))).
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% vim: ft=mercury ts=8 sw=4 et wm=0 tw=0
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