23 lines
778 B
C++
23 lines
778 B
C++
/*
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Copyright (c) 2016 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#pragma once
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#include <string>
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#include "library/vm/vm.h"
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namespace lean {
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vm_obj mk_io_result(vm_obj const & r);
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vm_obj mk_io_interface();
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/* The io monad produces a result object, or an error.
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If `o` is a result, then we return the result value. */
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optional<vm_obj> is_io_result(vm_obj const & o);
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/* The io monad produces a result object, or an error.
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If `o` is an error, then we return the io.error value. */
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optional<vm_obj> is_io_error(vm_obj const & o);
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/* Convert an io.error object into a string */
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std::string io_error_to_string(vm_obj const & o);
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void initialize_vm_io();
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void finalize_vm_io();
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}
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