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Copyright (C) 1999 CoreLinux Consortium
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The CoreLinux++ Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The CoreLinux++ Library Library is distributed in the hope that it will
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be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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// Implementation of Person. Note the pre and post invariants
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// enforcing age changes, as well as the assertion for illegal
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// construction or assignment. See notes in header concerning
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// real world application which enforces uniqueness in a domain
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#if !defined(__COMMON_HPP)
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#if !defined(__PERSON_HPP)
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using namespace corelinux;
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// The default (only!) constructor. Note: This is for example
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// only. Clearly the fact that we are using a constant string ref
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// no way insures that the originating string will be removed from
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// the stack without violating our invarience.
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Person::Person( NameCref aName, Age aAge )
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REQUIRE( theName.empty() == false );
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REQUIRE( theAge >= 0 && theAge < Limits::LONGMAX );
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// Illegal constructors defined. You could optionally
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// change the assertion to more explicit exceptions
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// as shown in the copy constructor
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Person::Person( void )
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Person::Person( PersonCref )
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TEXT("No two Persons can have the same name in this domain"),
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// Destructor. With Person there is really nothing to clean up
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Person::~Person( void )
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// Operator compares down to the name if applicable
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bool Person::operator==( PersonCref aPerson ) const
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if( this != &aPerson ||
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this->getName() != aPerson.getName())
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// Illegal operator dealt with
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PersonRef Person::operator=( PersonCref )
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NEVER_GET_HERE; // Assignment no allowed
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return *this; // avoid compiler errors
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// Explicit name fetch
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NameCref Person:: getName( void ) const
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// Coercion name fetch
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Person::operator NameCref( void ) const
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// Explicit age fetch
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AgeCref Person:: getAge( void ) const
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// Coercion age fetch
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Person::operator AgeCref( void ) const
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// Here we can change the age while at
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// the same time showing a good practice,
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// mainly INSURING THAT THE STATE OF THE
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// PERSON IS PRESERVED!!! Another note
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// is that the assertions from Assertion.hpp
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// can be compiled away. It is up to the
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// developer to understand what type constraints
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// should live forever, or just during development.
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void Person::setAge( Age aAge )
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REQUIRE( aAge >= 0 );
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Age aTempAge(this->getAge());
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ENSURE( theAge < Limits::LONGMAX );
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catch( AssertionRef e )
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Common rcs information do not modify
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$Date: 2000/01/19 14:30:07 $
added
removed
src/testdrivers/ex1/Person.cpp
