Comparative study of the pros and cons of programming. Metaprogramming concepts of programming languages alexander schramm. Mathematica stack exchange is a question and answer site for users of wolfram mathematica. Template metaprogramming is in fact turingcomplete, meaning that any computation expressible by a computer program can be computed, in some form, by a template metaprogram. Starting off the list for examples of metaprogramming is monkey patching. Metaprogramming applied to numerical problems mario mulansky and karsten ahnert department of physics and astronomy, university of potsdam metaprogramming is a programming technique where a computer program is written that writes or manipulates another program or itself that then solves a. First, the macro transformer itself may raise a runtime exception. If youre looking for a free download links of programming and meta programming in scheme undergraduate texts in computer science pdf, epub, docx and torrent then this site is not for you. Download programming and metaprogramming in scheme.
Application and interpretation version second edition shriram krishnamurthi april 14, 2017 1. It is designed to be a platform for programming language design and implementation. A stepper for scheme macros northeastern university. Metaprogramming in commonlisp is about the metaobjectprotocol. Template metaprogramming is generally not used in practical programs, it. Metaprogramming is a programming technique in which computer programs have the ability to treat other programs as their data.
In section 3, we describe our requirements on the underlying pro. That is the subset of metaprogramming called generativeprogramming. Metaml to facilitate the construction of metaprograms and then provide a trans. As well as providing a thorough grounding in scheme, the author discusses in depth different programming paradigms. Metaprogramming is writing a program which outputs another program. Note that the resulting class must be inserted into the global namespace, otherwise. Programming and metaprogramming in scheme undergraduate. This makes scheme the ideal language almost for creating programs that are transformed no massive parsing is needed to parse the program, and scheme itself is a listprocessing language. I not really metaprogramming no code manipulation happening i example of a runtime object model. Monkey patching is an object oriented programming technique that allows developers to.
It means that a program can be designed to read, generate, analyze or transform other programs, and even modify itself while running. Metaprogramming python 3 patterns, recipes and idioms. Programming and metaprogramming in scheme springerlink. Racket is a generalpurpose, multiparadigm programming language based on the scheme dialect of lisp. In computer science, functional programming is a programming paradigm where programs are constructed by applying and composing functions. By now, scheme is a wellestablished programming language and is finding. In some cases, this allows programmers to minimize the number of lines of code to. Programming and metaprogramming in scheme undergraduate texts in computer science jon pearce on. See how to build a code generator and get a closer look at languagesensitive macro programming in scheme. Copyright c 20, decorators with args 47 from functools import wraps def debugprefix. Scheme or how to interact with it that is the subject of the mit gnu scheme users manual.
We present a foundational calculus which can model both. From m s w ord, pdf files have been generated using adobe acrobat. In the scheme programming language, the language itself is represented as a linked list and the scheme programming language is built for list processing. The main programming language used in this book is racket. A survey of metaprogramming languages acm digital library. An unofficial list of r7rs errata is being collected. Essentially, metaprogramming is an operation in which a central control system controls hundreds of thousands of programs operating in parallel simultaneously. Metaprogramming cs251 programming languages fall 2017, lyn turbak department of computer science wellesley college these slides borrow heavily from ben woods fall 15 slides. Metaprogramming is the writing of computer programs that write or manipulate other programs or themselves as their data, or that do part of the work at compile time that would otherwise be done at runtime.
This case is naturally in the domain of runtime debuggers. Kent dybvig the scheme programming language2nd edition. If youre looking for a free download links of programming and metaprogramming in scheme undergraduate texts in computer science pdf, epub, docx and torrent then this site is not for you. Learn why metaprogramming is necessary and look at some of the components of metaprogramming textual macro languages, specialized code generators. We also provide interesting examples in support of this design. Although the primary goal is to teach students to program in scheme, this will be suitable for anyone taking. Metaprogramming cs251 programming languages spring 2017, lyn turbak department of computer science wellesley college these slides borrow heavily from ben woods fall 15 slides. Scheme has a convenient syntax for representing data literals. Sexpressions an sexpression is either i an atom a identi.
Following ferber, we may then informally distinguish structural re ection and computational re ection 9. Yes, its a weird name, but its a powerful and dangerous tool. Lisp lecture 2 slide 2 lisp was invented by john mccarthy in the late fifties. It is a declarative programming paradigm in which function definitions are trees of expressions that each return a value, rather than a sequence of imperative statements which change the state of the program or world in functional programming. Metaprogramming at first may seem to be an advanced topic, suitable only for programming language gurus, but its not really that difficult once you know how to.
It depends what precisely you mean by metaprogramming. Modellinghomogeneousgenerative metaprogramming martin berger1, laurence tratt2, and christian urban2 1university of sussex 2kings college london abstract homogeneous generative metaprogramming hgmp enables the generation of program fragments at compiletime or runtime. Scheme macro programming is therefore functional programming with a rich algebraic datatype. Therefore it is natural to start with a brief discussion of the family of languages, to which scheme belongs. Subsequent chapters describe special forms, numerous data abstractions. Lisp and scheme we use the programming language scheme in this material. This chapter summarizes the semantics of scheme, briefly describes the mit gnu scheme programming environment, and explains the syntactic and lexical conventions of the language. Of course, boolean expressions evaluate to boolean values and influence what code is executed when and how many times. Authoring of web pages, xml documents and pdf papers. Metaprogramming through typeful code representation. This is a teaching material about functional programming in scheme. The metaprogramming language is thus identical to the host programming language, and existing lisp routines can be directly reused for metaprogramming, if desired. In smalltalk, it is about hacking doesnotunderstand. An important theme throughout is that of metaprogramming.
I dont know who wrote the above, but i think it is wrong. In some cases, this allows programmers to minimize the number of lines of code to express. Source code from programming and meta programming chapter 2. Given appropriate inputs, a lisp macro can go wrong in two ways. A comprehensive first course in scheme, covering all of its major features. When used with different implicit invocation approaches, the advantages and disadvantages of each technique must be analyzed and compared to determine the best one for each particular situation. Meta programming in scheme with an arbitrary number of stages and crossstage persistence. The bedrock structured programming system combining generative metaprogramming and hoare logic in an extensible program veri. In section 4, we present two implementations of the speci. In addition to the core racket language, racket is also used to refer to the family of programming languages and set of tools supporting development on and with racket. Scheme and the art of programming unm computer science.
The r7rs small language specification pdf was approved in may 20 and endorsed by the scheme language steering committee later that year. In this paper, therefore, we present the design of a compiletime metaprogramming extension of haskell, a stronglytyped, purelyfunctional language. Scheme dybvig 2009 was the first language with a hygienic macro system, pioneered by. By now, scheme is a wellestablished programming language and is finding increasing popularity in programming courses for undergraduates. Programming and metaprogramming in scheme jon pearce. This approach has been implemented in other languages by incorporating an interpreter in the program, which works directly with. Scheme programs share a common printed representation with scheme data structures.
One way to implement implicit invocation within invariant maintenance is. In structural re ection, the metalevel entities are determined in some way by pro. In these languages, it is possible to view any program as a. This is something languages like lisp are really good at. One of the most underused programming techniques is writing programs that generate programs or program parts. Metaprogramming in scheme with an arbitrary number of stages and crossstage persistence. Its expressive capabilities are matched by a simplicity of language and easeofuse which have made its adherents disciples. Common lisp, emacs lisp, and scheme, exemplify this kind of reflective programming 42, 27, 21, 28. Like with all operating systems, however, racket actually supports a host of programming languages, so you 7. The first programming language that integrated support for metaprogramming was list processor lisp language in late 1950s. The scheme community is a notable exception, as we discuss in section 10. Directly reflective metaprogramming college of liberal arts. An introduction to metaprogramming for scientific computing dr conrad sanderson senior research scientist version 1.
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