6 Compliance

An EULISP processor can conform at either of the two levels defined under Language Structure in the Introduction. Thus a level-0 conforming processor must support all the basic expressions, classes and class operations defined at level-0. A level-1 conforming processor must support all the basic expressions, classes, class operations and modules defined at level-0 and at level-1.

The following two statements govern the conformance of a processor at a given level.

1. A conforming processor must correctly process all programs conforming both to the standard at the specified level and the implementation-defined features of the processor.
2. A conforming processor should offer a facility to report the use of an extension which is statically determinable solely from inspection of a program, without execution. (It is also considered desirable that a facility to report the use of an extension which is only determinable dynamically be offered.)

A level-0 conforming program is one which observes the syntax and semantics defined for level-0. A level-0 conforming program might not conform at level-1. A strictly-conforming level-0 program is one that also conforms at level-1. A level-1 conforming program observes the syntax and semantics defined for level-1.

In addition, a conforming program at any level must not use any extensions implemented by a language processor, but it can rely on implementation-defined features.

The documentation of a conforming processor must include:

1. A list of all the implementation-defined definitions or values.
2. A list of all the features of the language standard which are dependent on the processor and not implemented by this processor due to non-support of a particular facility, where such non-support is permitted by the standard.
3. A list of all the features of the language implemented by this processor which are extensions to the standard language.
4. A statement of conformity, giving the complete reference of the language standard with which conformity is claimed, and, if appropriate, the level of the language supported by this processor.