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30 lines
565 B
Mathematica
30 lines
565 B
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module foreign_underscore_var.
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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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:- implementation.
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main(!IO) :-
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f(X, !IO),
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io.write_int(X, !IO),
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io.nl(!IO).
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:- pred f(int::out, io::di, io::uo) is det.
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:- pragma foreign_proc("C",
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f(X::out, _IO0::di, _IO::uo),
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[will_not_call_mercury, promise_pure],
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"
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X = 5;
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").
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f(5, !IO).
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