VDM-10 Language Manual

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$Course Material\Efficiently Coding Communication Protocols in C++ ...$

VDM-10 Language Manual extended explicit function definition = identifier, [ type variable list ], parameter types, identifier type pair list, ‘==’, function body, [ ‘pre’, expression ], [ ‘post’, expression ] ; type variable list = ‘[’, type variable identifier, { ‘,’, type variable identifier }, ‘]’ ; identifier type pair list = identifier, ‘:’, type, { ‘,’, identifier, ‘:’, type } ; parameter types = ‘(’, [ pattern type pair list ], ‘)’ ; pattern type pair list = pattern list, ‘:’, type, { ‘,’, pattern list,‘:’, type } ; function type = partial function type | total function type ; partial function type = discretionary type, ‘->’, type ; total function type = discretionary type, ‘+>’, type ; discretionary type = type | ‘(’,‘)’ ; parameters = ‘(’, [ pattern list ], ‘)’ ; pattern list = pattern,{ ‘,’, pattern } ; function body = expression | ‘is not yet specified’ | ‘is subclass responsibility’ ; Here is not yet specified may be used as the function body during development of a model; whereas the is subclass responsibility indicates that implementation of this body must be undertaken by any subclasses so that can only be used in VDM++ and VDM-RT. A simple example of an explicit function definition is the function map inter which takes two compatible maps over natural numbers and returns those maplets common to both ✞ map_inter: (map nat to nat) * (map nat to nat) -> map nat to nat map_inter (m1,m2) == (dom m1 inter dom m2)
Chapter 5. Function Definitions Note that we could also use the optional post condition to allow assertions about the result of the function: ✞ map_inter: (map nat to nat) * (map nat to nat) -> map nat to nat map_inter (m1,m2) == (dom m1 inter dom m2)
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Page 3 and 4: Contents 1 Introduction 1 1.1 The V
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Page 7 and 8: CONTENTS A.7.19 The Undefined Expre
Page 9 and 10: Chapter 1 Introduction The Vienna D
Page 11 and 12: Chapter 2 Concrete Syntax Notation
Page 13 and 14: Chapter 3 Data Type Definitions As
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Page 41 and 42: Chapter 4 Algorithm Definitions In
Page 43: Chapter 5 Function Definitions In t
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Page 49 and 50: Chapter 6 Expressions In this subse
Page 51 and 52: Chapter 6. Expressions ✡✝ mk_Sc
Page 53 and 54: Chapter 6. Expressions Examples: Th
Page 55 and 56: Chapter 6. Expressions where e1 is
Page 57 and 58: Chapter 6. Expressions all expressi
Page 59 and 60: Chapter 6. Expressions where bd is
Page 61 and 62: Chapter 6. Expressions 6.8 Sequence
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Page 65 and 66: Chapter 6. Expressions mu operator.
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Page 75 and 76: Chapter 6. Expressions • #active(
Page 77 and 78: Chapter 6. Expressions ✞ state si
Page 79 and 80: Chapter 6. Expressions Semantics: A
Page 81 and 82: Chapter 7 Patterns Syntax: pattern
Page 83 and 84: Chapter 7. Patterns In the followin
Page 85 and 86: Chapter 7. Patterns ✡✝ ✆ The
Page 87 and 88: Chapter 8 Bindings Syntax: bind = s
Page 89 and 90: Chapter 9 Value (Constant) Definiti
Page 91 and 92: Chapter 10 Instance Variables (VDM+
Page 93 and 94: Chapter 11 The State Definition (VD
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Chapter 11. The State Definition (V
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Chapter 12 Operation Definitions Op
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Chapter 12. Operation Definitions s
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Chapter 12. Operation Definitions p
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Chapter 12. Operation Definitions h
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Chapter 13 Statements In this secti
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Chapter 13. Statements ✡✝ def t
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Chapter 13. Statements block return
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Chapter 13. Statements Examples: Th
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Chapter 13. Statements elseif state
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Chapter 13. Statements ‘do’, st
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Chapter 13. Statements 13.7 The Whi
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Chapter 13. Statements ✡✝ (dcl
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Chapter 13. Statements ✞ ✡✝ R
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Chapter 13. Statements where expres
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Chapter 13. Statements result of th
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Chapter 13. Statements ✡✝ else
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Chapter 13. Statements ✞ bootSequ
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Chapter 13. Statements ✞ op1 : na
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Chapter 14 Top-level Specification
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Chapter 14. Top-level Specification
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Chapter 15 Synchronization Constrai
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Chapter 15. Synchronization Constra
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Chapter 16 Threads (VDM++ and VDM-R
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Chapter 16. Threads (VDM++ and VDM-
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Chapter 16. Threads (VDM++ and VDM-
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Chapter 17 Top-level Specification
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Chapter 18 Trace Definitions In ord
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Chapter 18. Trace Definitions stack
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Chapter 19 Static Semantics VDM spe
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Chapter 20 Scope Conflicts (VDM++ a
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References [Ada LRM] [Bicarregui&94
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Chapter 20. Scope Conflicts (VDM++
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Appendix A The Syntax of the VDM La
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Appendix A. The Syntax of the VDM L
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Appendix B Lexical Specification B.
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Appendix B. Lexical Specification B
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Appendix B. Lexical Specification S
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Appendix C Operator Precedence The
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Appendix C. Operator Precedence eva
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Appendix C. Operator Precedence pre
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Appendix D Differences between the
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Index abs, 9 and, 6 card, 14 comp f
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INDEX arithmetic minus, 185 arithme
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INDEX boolean type, 6 char, 11 func
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INDEX sequence enumeration, 53, 187
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