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https://github.com/Mercury-Language/mercury.git
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1c8eece402
tests/hard_coded/backend_external.m:
tests/hard_coded/backend_external_pred.m:
tests/hard_coded/c_write_string.m:
tests/hard_coded/ee_dummy.m:
tests/hard_coded/pragma_c_code.m:
tests/hard_coded/pragma_foreign_export.m:
tests/hard_coded/target_mlobjs.m:
tests/hard_coded/type_tables.m:
tests/submodules/sm_exp_bug.m:
Use don't-care variables to handle the I/O state in foreign procs.
Assigning the I/O state at the end of the foreign_proc body results
in spurious warnings about uninitialized variables from MSVC.
36 lines
886 B
Mathematica
36 lines
886 B
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module c_write_string.
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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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%---------------------------------------------------------------------------%
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main(!IO) :-
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c_write_string("Hello, world\n", !IO),
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c_write_string("I am 8 today!\n", !IO),
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c_write_string(X, !IO),
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X = "fred\n".
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:- pragma foreign_decl("C", "#include <stdio.h>").
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:- pred c_write_string(string::in, io::di, io::uo) is det.
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:- pragma foreign_proc("C",
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c_write_string(Str::in, _IO0::di, _IO::uo),
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[will_not_call_mercury, promise_pure],
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"
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fputs(Str, stdout);
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").
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c_write_string(Str, !IO) :-
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% For the non-C backends.
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io.write_string(Str, !IO).
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