3 Oct Literate programming: Knuth is doing it wrong. Literate programming advocates this: Order your code for others to read, not for the compiler. Literate Programming (Lecture Notes) [Donald E. Knuth] on *FREE * shipping on qualifying offers. This anthology of essays from Donald Knuth, the. The book Literate Programming, Donald E. Knuth is published by Center for the Study of Language and Information.

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Not to be confused with Natural language programming. In fact, macros can stand for any arbitrary chunk of code or other macros, and are thus more general than top-down or bottom-up “chunking”, or than subsectioning.

This book received the Productivity Award from Computer Language magazine,awarded to products that significantly increase programmer productivity. Literate Programming in WEB”. Macros in a literate source file are simply title-like or explanatory phrases in a human language that describe human abstractions created while solving the programming problem, and hiding chunks of code or lower-level macros.

Knuth wrote a “novel” knuth literate programming explains the code of the interactive knuth literate programming game Colossal Cave Adventure.

Literate programming

Knuth also claims that literate programming provides a first-rate documentation system, which is not an add-on, but is grown naturally in the process of exposition of one’s knuth literate programming during a program’s creation. Literate programming is very often misunderstood [8] to refer only to formatted documentation produced from a common file with both source code and comments — which is properly called documentation knuth literate programming — or to voluminous commentaries included with code.

This book is the first in a series of eight volumes that contain archival forms of my published papers, together with new material. Knuth says that when he realized this, he began to think of a program as a web of various parts.

And if you do report an error knuth literate programming email, please do not include attachments of any kind; knuth literate programming message should be readable on brand-X operating systems for all values of X. In other words, the name of one macro can usefully be a parameter to another macro. He was inspired by the ideas of Pierre-Arnoul de Marneffe. The present chunk knuth literate programming, which does the countingwas actually one of the simplest to write.

Literate Programming, Knuth

Furthermore, several errors were knuth literate programming introduced on the cover of the printing: Schulte, Eric January If we express a program as a web of ideas, we can emphasize its structural properties in a natural and satisfying way. However, because these tools do not implement the “web of abstract concepts” hiding behind the system of natural-language macros, or provide an ability to change the order of the source code from a machine-imposed sequence to knuyh convenient to the human mind, they cannot properly be called literate programming tools in the sense intended by Knuth.

But after gaining experience with WEB, I have come to realize that there is no need to choose once and for all between top-down and bottom-up, because a program is best thought of as a web instead of a tree.

In either case please include your postal address, so that I can mail an official certificate of deposit as a token of thanks for knuth literate programming improvements to knuth literate programming you have contributed. Retrieved from ” https: This book is an anthology of essays including my early papers on knuth literate programming topics such as liteeate programming, as well as the article in The Computer Journal that launched Literate Programming itself.

These macros are similar to the algorithms in pseudocode typically used in teaching computer science.

Literate programming: Knuth is doing it wrong

Literate programming Computer-related introductions in Literate programming macros can hide any chunk of code behind themselves, and be knuth literate programming inside any low-level machine language operators, often inside logical operators such as ” if “, ” while ” or ” case “.

My original idea was that WEB would knuth literate programming merely a tool for documentation, but I actually found that my WEB programs were better than the programs I had been writing in other languages. Drawing and Literate Programming.

Views Read Edit View history. The grand totals must be initialized to zero at the beginning of the program. Numbers like P68 knuth literate programming Q78 in this knuth literate programming refer to the corresponding papers in my list of publications.

The following snippet of the wc literate program [10] shows how arbitrary descriptive phrases in a natural language are used in a literate program to create macros, which act as new knuth literate programming in the literate programming language, and hide chunks of code or other macros. Macros are not the same as “section names” in standard documentation.

Actually, writing out the expanded source code can be done from any section or subsection i.

Literate Programming

Knuth had privately used a literate programming system called DOC as knuth literate programming as And the fact that there’s no need to be hung up on the question of knuth literate programming versus bottom-up, since a programmer can now view a literatd program as a web, to be explored in a psychologically correct order is perhaps the greatest lesson I have learned from my recent experiences.

A complex piece of software consists of simple parts and simple relations between those parts; the knuth literate programming task is to state those parts and those relationships, in whatever order is best for human comprehension not in some rigidly determined order like top-down or kknuth.

This page was last edited on 26 Julyat There are various other implementations of the literate programmibg concept some of them don’t have macros and hence violate Order of human logic principle:. This misconception has led to claims that comment-extraction tools, such as the Perl Plain Old Documentation or Java Javadoc systems, are “literate programming tools”.

Again, I did this in the interests knith simplicity, because I noticed that most knuth literate programming of multiple parameters could in fact be reduced to the one-parameter case. The documentation for a literate program is produced as part of writing the program.

This differs from traditional documentation, in which a programmer is presented with source code that follows a compiler-imposed order, and must decipher the thought process behind the program from the code and its associated comments.

The preprocessor also knuth literate programming an ability to write out the content of the macros and to add to already created macros in any place in the text of the literate program source file, knuth literate programming disposing of the need to keep in mind the restrictions imposed by traditional programming languages or to interrupt the flow of thought. The literate programming paradigmas conceived by Knuth, represents a move away from writing programs in the manner and order imposed by the computer, and instead enables programmers to develop programs in the order demanded by the logic and flow of their thoughts.

But as time went on, I’ve become extremely pleased with the name, because I think that a complex piece of software is, indeed, best regarded as a web that has been delicately ,iterate together from simple materials. The programvolume B of his 5-volume Computers and Typesetting. These arbitrary explanatory phrases become precise new operators, created on the fly by the programmer, forming knuth literate programming meta-language on top of the underlying programming language.

Knuth literate programming number of lines in a file is The unraveling of the chunks can be done in any place in the literate program text file, not necessarily in the order they are sequenced in the enclosing chunk, but as is demanded by the logic reflected in the explanatory text that envelops the whole program.