3. Conformance

A conforming Ruby program shall:

• use only those features of the language specified in this document;
• not rely on implementation dependent features;

A conforming Ruby processor shall:

• accept any conforming programs and behave as specified in this document;
• reject any program which does not conform to the syntax described in this document;
• report any unhandled exceptions raised during execution of the conforming program;

A conforming Ruby processor may use an internal model for the Ruby language other than the one specified in this document, if it does not change the meaning of a conforming program.