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Portability Requirements

1995 Version of ANSI (Equivalent to Current ISO Version) of Standard

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American National Standard for Information Systems -
Programming Languages - M
(Section 2: M Portability Requirements)

Introduction

Section 2 highlights, for the benefit of implementors and application programmers, aspects of the language that must be accorded special attention if M program transferability (i.e., portability of source code between various M implementations) is to be achieved. It provides a specification of limits that must be observed by both implementors and programmers if portability is not to be ruled out. To this end, implementors must meet or exceed these limits, treating them as a minimum requirement. Any implementor who provides definitions in currently undefined areas must take into account that this action risks jeopardizing the upward compatibility of the implementation, upon subsequent revision of the M Language Specification. Application programmers striving to develop portable programs must take into account the danger of employing "unilateral extensions" to the language made available by the implementor.

The following definitions apply to the use of the terms explicit limit and implicit limit within this document. An explicit limit is one which applies directly to a referenced language construct. Implicit limits on language constructs are second-order effects resulting from explicit limits on other language constructs. For example, the explicit command line length restriction places an implicit limit on the length of any construct which must be expressed entirely within a single command line.

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Copyright © Standard Documents; 1977-2018 MUMPS Development Committee;
Copyright © Examples: 1995-2018 Ed de Moel;
Copyright © Annotations: 2003-2008 Jacquard Systems Research
Copyright © Annotations: 2008-2018 Ed de Moel.

This page most recently updated on 28-Nov-2011, 21:03:46 .

For comments, contact Ed de Moel (demoel@jacquardsystems.com)