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https://github.com/Mercury-Language/mercury.git
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5f5c67b281
library/cord.m:
Add is_singleton/2, foldr2/6 and foldr3/8.
NEWS:
Announce the above additions.
tests/hard_coded/Mmakefile:
tests/hard_coded/test_cord3.{m,exp}:
Add a test of is_singleton/2 (and is_empty/1).
64 lines
2.0 KiB
Mathematica
64 lines
2.0 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module test_cord3.
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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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%---------------------------------------------------------------------------%
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:- implementation.
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:- import_module cord.
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:- import_module list.
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:- import_module pair.
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:- import_module string.
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%---------------------------------------------------------------------------%
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main(!IO) :-
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list.foldl(test_is_empty, test_cords, !IO),
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io.nl(!IO),
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list.foldl(test_is_singleton, test_cords, !IO).
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%---------------------------------------------------------------------------%
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:- pred test_is_empty(pair(string, cord(int))::in, io::di, io::uo) is det.
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test_is_empty(Name - Cord, !IO) :-
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Result = ( if cord.is_empty(Cord) then "empty" else "not empty" ),
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io.format("%s is %s.\n", [s(Name), s(Result)], !IO).
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%---------------------------------------------------------------------------%
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:- pred test_is_singleton(pair(string, cord(int))::in, io::di, io::uo) is det.
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test_is_singleton(Name - Cord, !IO) :-
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( if cord.is_singleton(Cord, Result) then
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io.format("%s is a singleton with element %d.\n",
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[s(Name), i(Result)], !IO)
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else
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io.format("%s is not a singleton.\n", [s(Name)], !IO)
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).
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%---------------------------------------------------------------------------%
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:- func test_cords = list(pair(string, cord(int))).
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test_cords = [
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"Empty" - cord.empty,
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"Singleton1" - cord.singleton(1),
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"Singleton2" - cord.from_list([2]),
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"NonSingleton1" - cord.from_list([3, 4]),
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"NonSingleton2" - (cord.singleton(5) ++ cord.singleton(6))
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].
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%---------------------------------------------------------------------------%
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:- end_module test_cord3.
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%---------------------------------------------------------------------------%
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