By David C. Luckham, Friedrich W. von Henke, Bernd Krieg-Brueckner, Olaf Owe
This reference guide of ANNA is one other quantity addressed to the ADA neighborhood. ANNA is a language extension of ADA to incorporate amenities for officially specifying the meant habit of ADA courses. it really is designed to satisfy a perceived have to increase ADA with detailed machine-processable annotations in order that good confirmed formal tools of specification and documentation should be utilized to ADA courses. the present ANNA layout comprises annotations of all ADA constructs other than tasking. related extensions for formal specification could be made to different Algol-like languages resembling Pascal, PL/1, Concurrent Pascal, and Modula; basically, those extensions will be subsets of ANNA. The layout of ANNA used to be undertaken from the start with 4 significant concerns: 1. developing annotations will be effortless for the ADA programmer and may rely up to attainable on notation and ideas of ADA. 2. ANNA should still own language gains which are commonly used within the specification and documentation of courses. three. ANNA should still offer a framework in which a number of the confirmed theories of officially specifying courses should be utilized to ADA. four. Annotations will be both compatible for various attainable functions in the course of the lifestyles cycle of a software. Such functions comprise not just trying out, debugging and formal verification of a accomplished application, but in addition specification of software elements in the course of the past levels of necessities research and software design.
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Additional resources for ANNA A Language for Annotating Ada Programs
Ada_simple_statement ... I basic_annotat ion_] i st c o m p o u n d _ s t a t e m e n t : := [compound_statement_annotation] . . ada_compound_statement . . _l i s t A statement annotation is either a simple statement annotation or a compound statement annotation. 2). A compound statement annotation is a list of basic annotations that follows the reserved word w i t h and precedes a compound statement. The scope of a statement annotation is a statement. The scope of a simple statement annotation is the immediately preceding statement.
3 Constraints on Access Types. 3). In the case of access (sub)type declarations most annotations will constrain the designated values and not the access values themselves. When an annotation on a subtype of an access type constrains only the designated values, any value of the original access type can be used to designate a value in the appropriate subset of values of the designated type. Therefore, in these cases, the set of access values of the subtype will be the same as the base type; runtime checks ensure that each access subtype value designates a constrained value.
Objects of this type may be declared in virtual Ada text and used in annotations. 7ANNOTATIONSOFRECORDTYPES 3. e.. an empty collection. C'NEXT For a prefix C that denotes a collection state of type T'COLLECTION'TYPE: Yields the next value of type T to be allocated when the collection has state C. If T1 is a subtype of access type T then the collection associated with T I is the collection of T and may be referred to as T1 'COLLECTION or as T I ' BASE' COLLECTION. T'COLLECIION is a dynamic attribute in the sense that its value changes during a computation.
ANNA A Language for Annotating Ada Programs by David C. Luckham, Friedrich W. von Henke, Bernd Krieg-Brueckner, Olaf Owe