%---------------------------------------------------------------------------%
% vim: ts=4 sw=4 et ft=mercury
%---------------------------------------------------------------------------%

:- module copy_pred.
:- interface.
:- import_module io.

:- pred main(io::di, io::uo) is det.

:- implementation.

:- import_module list.
:- import_module map.
:- import_module string.
:- import_module univ.

:- type phloat == float.

main(!IO) :-
    F = foo(10, 20.2, 30, 40.4),
    copy(F, F2),
    io.set_globals(univ(F2), !IO),
    io.get_globals(Univ, !IO),
    det_univ_to_type(Univ, F3),
    inst_cast(F3, F4),
    F4("blah", S),
    io.print(S, !IO),
    io.nl(!IO).

:- pred inst_cast(pred(string, string), pred(string, string)).
:- mode inst_cast(in, out(pred(in, out) is det)) is det.

:- pragma foreign_proc("C",
    inst_cast(X::in, Y::out(pred(in, out) is det)),
    [will_not_call_mercury, thread_safe, promise_pure], "Y = X").
:- pragma foreign_proc("C#",
    inst_cast(X::in, Y::out(pred(in, out) is det)),
    [will_not_call_mercury, thread_safe, promise_pure], "Y = X;").
:- pragma foreign_proc("Java",
    inst_cast(X::in, Y::out(pred(in, out) is det)),
    [will_not_call_mercury, thread_safe, promise_pure], "Y = X;").

:- pred foo(int::in, float::in, int::in, phloat::in, string::in, string::out)
    is det.

foo(A, B, C, D, S0, S) :-
    string.format("%d, %g, %d, %g, %s", [i(A), f(B), i(C), f(D), s(S0)], S).