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https://github.com/Mercury-Language/mercury.git
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1f6d83692a
tests/hard_coded/*.m:
Update programming style, unless doing so would change
the meaning of the test, in particular:
- use '.' as a module qualifier in place of '__'
- use {write,print}_line where appropriate
- use if-then-else in place of C -> T ; E
- use state variables in place of DCGs
tests/hard_coded/dir_test.m:
Document what the expected outputs correspond to.
Use a uniform module qualifier in the output.
tests/hard_coded/dir_test.exp*:
Conform to the above change.
107 lines
2.5 KiB
Mathematica
107 lines
2.5 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 module tests the use of existential types,
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% including type inference,
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% but not including type class constraints.
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% This test is designed to test boxing/unboxing
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% of types with non-word size, i.e. chars and floats.
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:- module existential_float.
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:- interface.
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:- import_module io.
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:- import_module univ.
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:- type foo
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---> left
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; right.
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:- some [T] func call_univ_value(univ) = T.
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:- some [T] func my_exist_c = T.
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:- some [T] func my_exist_f = T.
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:- some [T] func my_exist_fn = T.
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:- some [T] pred my_exist_p_multi(T::out) is multi.
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:- some [T] pred my_exist_p_semi(foo::in, T::out) is semidet.
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:- pred main(io::di, io::uo) is cc_multi.
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:- implementation.
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:- import_module int.
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:- import_module solutions.
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main(!IO) :-
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foo(univ(my_exist_c), !IO),
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foo(univ(my_exist_f), !IO),
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foo(univ(my_exist_fn), !IO),
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foo(univ(call_my_exist_c), !IO),
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foo(univ(call_my_exist_f), !IO),
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foo(univ(call_my_exist_fn), !IO),
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io.write_line(my_exist_c, !IO),
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io.write_line(my_exist_f, !IO),
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io.write_line(my_exist_fn, !IO),
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io.write_line(call_my_exist_c, !IO),
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io.write_line(call_my_exist_f, !IO),
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io.write_line(call_my_exist_fn, !IO),
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( if call_my_exist_p_semi(left, X1) then
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io.write_line(X1, !IO)
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else
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io.print_line("no.", !IO)
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),
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( if call_my_exist_p_semi(right, X2) then
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io.write_line(X2, !IO)
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else
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io.print_line("no.", !IO)
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),
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( if my_exist_p_semi(left, X3) then
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io.write_line(X3, !IO)
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else
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io.print_line("no.", !IO)
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),
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( if my_exist_p_semi(right, X4) then
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io.write_line(X4, !IO)
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else
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io.print_line("no.", !IO)
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),
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unsorted_solutions(my_univ_p_multi, List),
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io.write_line(List, !IO).
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my_exist_c = 'c'.
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my_exist_f = 42.0.
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my_exist_fn = (func(X) = 2 * X).
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my_exist_p_multi(1.0).
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my_exist_p_multi(2.0).
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my_exist_p_semi(left, 33.3).
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call_my_exist_c = my_exist_c.
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call_my_exist_f = my_exist_f.
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call_my_exist_fn = my_exist_fn.
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call_my_exist_p_multi(X) :-
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my_exist_p_multi(X).
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call_my_exist_p_semi(A, B) :-
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my_exist_p_semi(A, B).
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:- mode my_univ_p_multi(out) is multi.
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my_univ_p_multi(univ(X)) :-
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call_my_exist_p_multi(X).
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:- pred foo(univ::in, io::di, io::uo) is det.
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foo(X, !IO) :-
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io.write_line(univ_value(X), !IO),
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io.write_line(call_univ_value(X), !IO).
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call_univ_value(Univ) = univ_value(Univ).
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