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https://github.com/Mercury-Language/mercury.git
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97735d9630
library/std_util.m:
Make std_util.pow/3 throw an exception if it is called with a negative
integer as its second argument.
tests/hard_coded/Mmakefile:
tests/hard_coded/func_exp.{m,exp}:
Add a test of pow/3.
NEWS:
Announce the above change.
53 lines
1.4 KiB
Mathematica
53 lines
1.4 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ft=mercury ts=4 sw=4 et
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%---------------------------------------------------------------------------%
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:- module func_exp.
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:- interface.
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:- import_module io.
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:- pred main(io::di, io::uo) is cc_multi.
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%---------------------------------------------------------------------------%
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%---------------------------------------------------------------------------%
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:- implementation.
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:- import_module int.
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:- import_module list.
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:- import_module std_util.
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:- import_module string.
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%---------------------------------------------------------------------------%
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main(!IO) :-
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do_test(-1, 1, !IO),
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do_test(0, 1, !IO),
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do_test(1, 1, !IO),
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do_test(10, 1, !IO).
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%---------------------------------------------------------------------------%
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:- pred do_test(int::in, int::in, io::di, io::uo) is cc_multi.
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do_test(N, X, !IO) :-
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io.format("pow(double, %d, %d) = ", [i(N), i(X)], !IO),
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( try []
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Result = std_util.pow(double, N, X)
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then
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io.print_line(Result, !IO)
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catch_any S ->
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io.print_line(S, !IO)
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).
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%---------------------------------------------------------------------------%
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:- func double(int) = int.
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double(X) = 2 * X.
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%---------------------------------------------------------------------------%
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:- end_module func_exp.
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%---------------------------------------------------------------------------%
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