PPT-cs784(Prasad)

1 Specification and Implementation of Abstract Data Types Spec v Impl Functional Specs should describe behavioral aspects only Should ignore performance details A suitable implementation requires client specific issues and tradeoffs. RAJENDRA PRASAD CENTRE FOR OPHTHALMIC SCIENCES AIIMS NEW DELHI OPD CLINICS SCHEDULE FORENOON AFTERNOON MONDAY UnitI VITREO RETINATRAUMA CLINIC New 30 Old 32 Dr Yog Raj Sharma 22 UnitII Dr Raj Pal 03 D Prasad EFX has for the first time in India also provided Digital Intermediate VFX and Digital Cinema prints all in the 3D platform for this movie Vikram Bhatt producer and director of HAUNTED 3D says The team at Prasad EFX has done a superb job trul CS784: Programming Languages. Prabhaker Mateti. Study …. EOPL3 . Chapter 3: 3.1, 3.2. source code: chapter3/let-. lang. /*. 1722 data-. structures.scm. 4415 . drscheme-init.scm. 1450 . environments.scm. 1 Bottom-Up Parsing Basics CS780(Prasad)L13BUPBasic2 Example: Rightmost Derivation A - Aa| aB - bF| bF - f F | f Input String: aaabffc S= A CS780(Prasad)L13BUPBasic3 Example: Symbol Stack Inpu Prabhaker. . Mateti. ACK: Assembled from many sources. About Attribute Grammars. Attribute grammars (AGs) add semantic info on parse tree nodes . Used for semantic checking and other compile-time analyses, e.g., type checking in a compiler. Dijkstra’s Predicate Transformer. s. Axiomatic Semantics. gcd. -lcm algorithm w/ invariant. {PRE: (x = n) and (y = m)}. u := x; v := y;. while . {INV: 2*m*n = x*v + y*u}. (x <> y) do. if x > y then. More on Evaluations. CS784(pm). 1. Scheme Expressions. Constants: numbers, . booleans. .. Variables: names for values. Created using the special form . define. Special. forms have special rules for evaluation. . Procs. w/. Params. EOPL3 Chapter 4. Expressible vs. Denotable values. Expressible Values . the language can express and compute these. represented in the language's syntax as expressions. Denotable Values . Procs. w/. Params. cs784(tk) . 1. Assignment, LHS := RHS. l-value: left-, location, address, reference, …. r-value: right-, . int. , real, address, …. env. and store allow one to describe the semantics of assignment in a purely functional style. (DENOTATIONAL SEMANTICS). Different Levels of Syntax. Lexical syntax. Basic symbols (names, values, operators, etc.). Concrete syntax. Rules for writing expressions, statements, programs. Input to compilers/interpreters. Abstract syntax. 1.Non-Mulberry 2.Rearing 3.Rearing 4.Preparation 5.Environmental Equipment Required for Rearing 300DFL 1. Implementing Recursion. Recap: Goals. Experimenting with PL design alternatives Scoping, parameter passing, arrays, .... Runnable. prototype of reference implementation.. Cf. Informal description of a programming problem with an example executable for reference.. 1. Semantics . of . Procedures and Scopes. Kinds of Scope. Static or Lexical scope. determined by structure of program. Scheme, . C++, Java, and many compiled languages. Dynamic scope. determined by path of execution. Dr Versha Prasad. Dr Versha Prasad. Introduction. DLC is important for the diagnosis of various blood related disorders, involving white cell or red cell. Generally, it is performed to check the normal number or distribution of different leucocytes. It also gives morphology of different cells.It is usefull to identify changes in the distribution of white cells which may be related to specific types of disorders. .