Transformation of Applicative Specifications into Imperative ...

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CHAPTER 8. SPECIFICATIONS constructs into corresponding imperative constructs according to the transformation rules given in Chapter 6. An interesting example of this can be seen in Specification 8.2, which shows some parts of the main function TR- ValueExpr for transforming value expressions. Specification 8.2 – Transformation of a value expression TRValueExpr : ValueExpr × ExpType × FUNC × TRANS × TYPES → ValueExpr × TYPES TRValueExpr(ve, et, func, trans, types) ≡ case ve of Make_ValueLiteral(vl) → (makeAssignExpr(ve, et, trans), types), Make_ValueOrVariableName(vn) → if ∼ isinBinding(IdBinding(id(vn)), dom types) then if id(vn) ∈ dom func then /∗Constant of the type of interest.∗/ TRValueExpr( ApplicationExpr(ve, 〈〉), et, func, trans, types) else (ve, types) end else if checkTRANS( types(IdBinding(id(vn))), dom trans) then /∗The value expression is of a type of interest. ∗/ (makeAssignExpr( getTRANS(types(IdBinding(id(vn))), trans), et, trans), types) else /∗The value expression is not of a type of interest. ∗/ (makeAssignExpr(ve, et, trans), types) end end, . ValueInfixExpr(first, op, second) → 80
. end 8.4. SPECIFICATION OF THE TRANSFORMER IN RSL1 let (first ′ , types ′ ) = TRValueExpr( first, Unknown, func, trans, types), (second ′ , types ′′ ) = TRValueExpr( second, Unknown, func, trans, types ′ ) in (makeAssignExpr( ValueInfixExpr(first ′ , op, second ′ ), et, trans), types ′′ ) end, As can be seen in Specification 8.2 the transformation of a value expression is done by casing over the kind of the value expression. A value literal is not transformed. A value or variable name is either a constant of a type of interest and is transformed as an application expression with no parameters, it is a value name of a type of interest and is transformed into the corresponding variable, or it is a value name not of the type of interest in which case it is transformed into itself. An infix expression is transformed by first transforming the left hand side of the infix operator, then transforming the right hand side of the infix operator and finally establishing a new infix expression consisting of the two transformed value expressions and the original infix operator. In all cases the function makeAssignExpr establishes assignment expressions when necessary. The value of the TYPES map is altered during the transformation to reflect the point of execution. It is clear from this specification that it follows the transformation rules given in Section 6.4.3 The rest of the transformation follows the same pattern. 8.4 Specification of the Transformer in RSL1 Due to the use of the RSL2Java tool it is necessary to specify the transformer in RSL1. This is done based on the specification of the transformer in RSL, which is translated into RSL1 by hand . The specification of the transformer in RSL1 TransformerRSL1.rsl can be found in Appendix D. In the following the main changes made in order to translate from RSL into RSL1 are described. 81
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Transformation of Applicative Speci
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Resumé RAISE udviklingsmetoden er
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viii
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CONTENTS 6.4.3 Transforming Value E
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CONTENTS 12.2.4 Interactive Transfo
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LIST OF FIGURES xvi
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CHAPTER 1. INTRODUCTION This stepwi
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CHAPTER 1. INTRODUCTION 1. Formulat
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CHAPTER 1. INTRODUCTION 1.7 Content
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CHAPTER 2. GENERAL IDEA end value e
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CHAPTER 2. GENERAL IDEA • In the
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CHAPTER 2. GENERAL IDEA value incre
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CHAPTER 3. TERMINOLOGY Expected Typ
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CHAPTER 3. TERMINOLOGY Example 3.5
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CHAPTER 3. TERMINOLOGY 18
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CHAPTER 4. CONSTRAINTS further deve
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CHAPTER 4. CONSTRAINTS of interest.
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CHAPTER 4. CONSTRAINTS 24
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CHAPTER 5. TRANSFORMABILITY scheme
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CHAPTER 13. CONCLUSION RSL AST and
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CHAPTER 13. CONCLUSION 132
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BIBLIOGRAPHY [ST02] Donald Sannello
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APPENDIX A. USING AND EXTENDING THE
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APPENDIX A. USING AND EXTENDING THE
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APPENDIX B. CONTENTS OF CD-ROM 140
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APPENDIX C. FORMAL SPECIFICATIONS O
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APPENDIX D. SPECIFICATION OF TRANSF
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APPENDIX E. ANTLR GRAMMAR END = "en
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APPENDIX E. ANTLR GRAMMAR ; d = d e
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APPENDIX E. ANTLR GRAMMAR ; } ( com
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APPENDIX E. ANTLR GRAMMAR ; } else
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APPENDIX E. ANTLR GRAMMAR prod_bind
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APPENDIX E. ANTLR GRAMMAR ; | | | |
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APPENDIX E. ANTLR GRAMMAR ; | NAT {
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APPENDIX E. ANTLR GRAMMAR new RSLLi
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APPENDIX E. ANTLR GRAMMAR infix_op_
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APPENDIX E. ANTLR GRAMMAR : v l = v
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APPENDIX F. SOURCE CODE System . e
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APPENDIX F. SOURCE CODE public void
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APPENDIX F. SOURCE CODE StringRSLAs
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APPENDIX F. SOURCE CODE } nameOrWil
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APPENDIX F. SOURCE CODE } public vo
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APPENDIX F. SOURCE CODE } r e s u l
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APPENDIX F. SOURCE CODE } } public
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APPENDIX F. SOURCE CODE } r e s u l
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APPENDIX G. TEST RESULTS continued
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