Class-Contract

Changes for version 1.00 - 2000-08-06

Changed semantics of preconditions. Now only inherited if not defined in same class (this conforms with the notion of derived classes being allowed to weaken, but not strengthen preconditions).
Added postconditions on SCALAR, ARRAY, and HASH attributes
Added &value for attr conditions
Removed &result -- now uses &value instead
Added warning when explicit preconditions in derived class override inherited preconditions from base class.
Added default ctor ('new') if none specified.
Modified flyweight implementation (more robust, secure, and efficient)
Modified ctors to refuse to instantiate classes with 1+ abstract methods.
Added class constructors and destructors
Changed production code mechanism (now a separate, accelerated class: Class::Contract::Production)

Design-by-Contract OO in Perl.

Design-by-Contract OO in Perl.

in lib/Class/Contract.pm

in lib/Class/Contract.pm

in lib/Class/Contract.pm

To install Class::Contract, copy and paste the appropriate command in to your terminal.

cpanm Class::Contract

perl -MCPAN -e shell
install Class::Contract

For more information on module installation, please visit the detailed CPAN module installation guide.

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