FM / contract

/usr/include/boost/contract

Name	Size	Mode	Actions
core/	-	0755	rm
detail/	-	0755	rm
assert.hpp	6239	0644	edit dl rm
base_types.hpp	7387	0644	edit dl rm
call_if.hpp	26719	0644	edit dl rm
check.hpp	15348	0644	edit dl rm
constructor.hpp	3806	0644	edit dl rm
destructor.hpp	3740	0644	edit dl rm
function.hpp	3185	0644	edit dl rm
old.hpp	28809	0644	edit dl rm
override.hpp	7861	0644	edit dl rm
public_function.hpp	38431	0644	edit dl rm

Edit: /usr/include/boost/contract/destructor.hpp (3740B)

#ifndef BOOST_CONTRACT_DESTRUCTOR_HPP_
#define BOOST_CONTRACT_DESTRUCTOR_HPP_

// Copyright (C) 2008-2018 Lorenzo Caminiti
// Distributed under the Boost Software License, Version 1.0 (see accompanying
// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html

/** @file
Program contracts for destructors.
*/

#include <boost/contract/core/config.hpp>
#include <boost/contract/core/specify.hpp>
#include <boost/contract/core/access.hpp>
#if     !defined(BOOST_CONTRACT_NO_DESTRUCTORS) || \
        !defined(BOOST_CONTRACT_NO_PRECONDITIONS) || \
         defined(BOOST_CONTRACT_STATIC_LINK)
    #include <boost/contract/detail/operation/destructor.hpp>
#endif

namespace boost { namespace contract {

/**
Program contracts for destructors.

This is used to specify postconditions, exception guarantees, old value copies
at body, and check class invariants for destructors (destructors cannot have
preconditions, see
@RefSect{contract_programming_overview.destructor_calls, Destructor Calls}):

@code
class u {
    friend class boost::contract::access;

void invariant() const { // Optional (as for static and volatile).
        BOOST_CONTRACT_ASSERT(...);
        ...
    }

public:
    ~u() {
        boost::contract::old_ptr<old_type> old_var;
        boost::contract::check c = boost::contract::destructor(this)
            // No `.precondition` (destructors have no preconditions).
            .old([&] { // Optional.
                old_var = BOOST_CONTRACT_OLDOF(old_expr);
                ...
            })
            .postcondition([&] { // Optional.
                BOOST_CONTRACT_ASSERT(...);
                ...
            })
            .except([&] { // Optional.
                BOOST_CONTRACT_ASSERT(...);
                ...
            })
        ;

... // Destructor body.
    }
    
    ...
};
@endcode

For optimization, this can be omitted for destructors that do not have
postconditions and exception guarantees, within classes that have no invariants.

@see @RefSect{tutorial.destructors, Destructors}

@param obj  The object @c this from the scope of the enclosing destructor
            declaring the contract.
            (Destructors check all class invariants, including static and
            volatile invariants, see @RefSect{tutorial.class_invariants,
            Class Invariants} and
            @RefSect{extras.volatile_public_functions,
            Volatile Public Functions}).

@tparam Class   The type of the class containing the destructor declaring the
                contract.
                (Usually this template parameter is automatically deduced by C++
                and it does not need to be explicitly specified by programmers.)

@return The result of this function must be assigned to a variable of type
        @RefClass{boost::contract::check} declared explicitly (i.e., without
        using C++11 @c auto declarations) and locally just before the code of
        the destructor body (otherwise this library will generate a run-time
        error, see @RefMacro{BOOST_CONTRACT_ON_MISSING_CHECK_DECL}).
*/
template<class Class>
specify_old_postcondition_except<> destructor(Class* obj) {
    // Must #if also on ..._PRECONDITIONS here because specify_... is generic.
    #if     !defined(BOOST_CONTRACT_NO_DESTRUCTORS) || \
            !defined(BOOST_CONTRACT_NO_PRECONDITIONS) || \
             defined(BOOST_CONTRACT_STATIC_LINK)
        return specify_old_postcondition_except<>(
                new boost::contract::detail::destructor<Class>(obj));
    #else
        return specify_old_postcondition_except<>();
    #endif
}

} } // namespace

#endif // #include guard

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