By David C. Luckham, Friedrich W. von Henke, Bernd Krieg-Brueckner, Olaf Owe
This reference handbook 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 truly is designed to fulfill a perceived have to increase ADA with targeted machine-processable annotations in order that good demonstrated formal equipment of specification and documentation may be utilized to ADA courses. the present ANNA layout comprises annotations of all ADA constructs other than tasking. related extensions for formal specification will be made to different Algol-like languages akin to Pascal, PL/1, Concurrent Pascal, and Modula; primarily, those extensions will be subsets of ANNA. The layout of ANNA was once undertaken from the start with 4 vital issues: 1. developing annotations may be effortless for the ADA programmer and may count up to attainable on notation and ideas of ADA. 2. ANNA may still own language positive factors which are established within the specification and documentation of courses. three. ANNA should still supply a framework in which a number of the verified theories of officially specifying courses could be utilized to ADA. four. Annotations could be both like minded for various attainable functions in the course of the lifestyles cycle of a software. Such purposes contain not just checking out, debugging and formal verification of a comprehensive software, but in addition specification of application elements through the previous levels of necessities research and software design.
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Extra info for ANNA A Language for Annotating Ada Programs
Name ::: simple_name expression ::= (compound_expression) on following a modifier in or out is said to be modified by that modifier; similarly, all ariables of a modified expression are considered to be modified by that modifier. The ay be applied to a simple name or a parenthesized compound expression. 2). sions may appear inside an expression modified by out. Modifiers may not be applied to les. g. , the value of V in the initial state, and an initial expression, in (E) denotes the initial value of the (compound) expression E.
G, X. F, denotes the same value as T' COLLECTION( X ). F. States containing sequences of more than one collection operation denote the state of the collection after the corresponding sequence of Aria operations has been performed on the objects of type T. If the sequence of collection operations contains more than one change of the complete object designated by an access value, the rightmost operation defines the value of the object designated by that access value in that state; similarly for multiple changes of a component of a designated object.
For example, within the scope of an annotated subtype declaration of the form, subtype T is S; --I w h e r e X : T => C(X); an if-statement, if Y in T then A end if; is transformed to, if Y in T t h e n --: ifnot C(Y) t h e n raise ANNA_ERROR; end if; A; e n d if ; The Anna membership test X isin T has the value TRUE if X belongs to the set of values denoted by T and also satisfies any type annotation of T; otherwise the test has the value FALSE. The test not isin gives the complementary result to the membership test isin.