A perspective on Pascal. Ambiguities and insecurities in Pascal. Pascal and portability. Pascal in education.The efficiency of Pascal. The future of Pascal the Zurich implementation. Code generation for a Pascal compiler. Pascal-P implementation notes. Two 1900 compilers. A Pascal diagnostics system. Pascal-S: a subset and its implementation. Pascal on an advanced architecture. A Pascal machine? index.

A perspective on Pascal. Ambiguities and insecurities in Pascal. Pascal and portability. Pascal in education.The efficiency of Pascal. The future of Pascal the Zurich implementation. Code generation for a Pascal compiler. Pascal-P implementation notes. Two 1900 compilers. A Pascal diagnostics system. Pascal-S: a subset and its implementation. Pascal on an advanced architecture. A Pascal machine? index.

Despite using them every day, most software engineers know little about how programming languages are designed and implemented. For many, their only experience with that corner of computer science was a terrifying "compilers" class that they suffered through in undergrad and tried to blot from their memory as soon as they had scribbled their last NFA to DFA conversion on the final exam. That fearsome reputation belies a field that is rich with useful techniques and not so difficult as some of its practitioners might have you believe. A better understanding of how programming languages are built will make you a stronger software engineer and teach you concepts and data structures you'll use the rest of your coding days. You might even have fun. This book teaches you everything you need to know to implement a full-featured, efficient scripting language. You'll learn both high-level concepts around parsing and semantics and gritty details like bytecode representation and garbage collection. Your brain will light up with new ideas, and your hands will get dirty and calloused. Starting from main(), you will build a language that features rich syntax, dynamic typing, garbage collection, lexical scope, first-class functions, closures, classes, and inheritance. All packed into a few thousand lines of clean, fast code that you thoroughly understand because you wrote each one yourself.

Learn to design your own programming language in a hands-on way by building compilers, using preprocessors, transpilers, and more, in this fully-refreshed second edition, written by the creator of the Unicon programming language. Purchase of the print or Kindle book includes a free PDF eBook Key Features Takes a hands-on approach; learn by building the Jzero language, a subset of Java, with example code shown in both the Java and Unicon languages Learn how to create parsers, code generators, scanners, and interpreters Target bytecode, native code, and preprocess or transpile code into a high-level language Book DescriptionThere are many reasons to build a programming language: out of necessity, as a learning exercise, or just for fun. Whatever your reasons, this book gives you the tools to succeed. You’ll build the frontend of a compiler for your language and generate a lexical analyzer and parser using Lex and YACC tools. Then you’ll explore a series of syntax tree traversals before looking at code generation for a bytecode virtual machine or native code. In this edition, a new chapter has been added to assist you in comprehending the nuances and distinctions between preprocessors and transpilers. Code examples have been modernized, expanded, and rigorously tested, and all content has undergone thorough refreshing. You’ll learn to implement code generation techniques using practical examples, including the Unicon Preprocessor and transpiling Jzero code to Unicon. You'll move to domain-specific language features and learn to create them as built-in operators and functions. You’ll also cover garbage collection. Dr. Jeffery’s experiences building the Unicon language are used to add context to the concepts, and relevant examples are provided in both Unicon and Java so that you can follow along in your language of choice. By the end of this book, you'll be able to build and deploy your own domain-specific language.What you will learn Analyze requirements for your language and design syntax and semantics. Write grammar rules for common expressions and control structures. Build a scanner to read source code and generate a parser to check syntax. Implement syntax-coloring for your code in IDEs like VS Code. Write tree traversals and insert information into the syntax tree. Implement a bytecode interpreter and run bytecode from your compiler. Write native code and run it after assembling and linking using system tools. Preprocess and transpile code into another high-level language Who this book is for This book is for software developers interested in the idea of inventing their own language or developing a domain-specific language. Computer science students taking compiler design or construction courses will also find this book highly useful as a practical guide to language implementation to supplement more theoretical textbooks. Intermediate or better proficiency in Java or C++ programming languages (or another high-level programming language) is assumed.

A preliminary version o~ the programming language Pascal was dra~ted in 1968. It ~ollowed in its spirit the A1gol-6m and Algo1-W 1ine o~ 1anguages. A~ter an extensive deve10pment phase, a~irst compiler became operational in 197m, and pub1ication ~ollowed a year 1ater (see Re~erences 1 and 8, p.1m4). The growing interest in the deve10pment of compilers ~or other computers ca11ed ~or a conso1idation o~ Pascal, and two years of experience in the use o~ the 1anguage dictated a few revisions. This 1ed in 1973 to the pub1ication o~ a Revised Report and a de~inition o~ a 1anguage representation in terms of the ISO cha:.:.acter set. This booklet consists o~ two parts: The User Manual, and the Revised Report. The ManUAl is directed to those who have previous1y acquired some ~ami1iarity with computer programming, and who wish to get acquainted with the 1anguage Pascal. Hence, the style o~ the Manual is that o~ a tutorial, and many examp1e~ are inc1uded to demonstrate the various ~eatures o~ Pascal. Summarising tab1es and syntax speci~ications are added as Appendices. The Report is inc1uded in this booklet to serve as a concise, u1timate reference ~or both programmers and imp1ementors. It defines stAndArd Pascal which constitutes a common base between various implementations of the 1anguage.

Academic legal production, when it focuses on the study of law, generally grasps this concept on the basis of a reference to positive law and its practice. This book differs clearly from these analyses and integrates the legal approach into the philosophy of normative language, philosophical realism and pragmatism. The aim is not only to place the examination of law in the immanence of its practice, but also to take note of the fact that legal enunciation must be taken seriously. In order to arrive at this analysis, it is necessary to go beyond traditional perspectives and to base reflection on an investigation of the conditions for enunciating law in our democracies. This analysis thus offers a renewal of the ethics inherent in the action of jurists and an original reflection on the role of certain legal tools such as concepts, categories, or "provisions". In this sense, the work nourishes its originality not only by the transversality of its approach, but also by the will to situate legal thought in concrete forms of its implementation. The book will be essential reading for academics working in the areas of legal theory, legal philosophy and constitutional theory.

In-depth case studies of representative languages from five generations of programming language design (Fortran, Algol-60, Pascal, Ada, LISP, Smalltalk, and Prolog) are used to illustrate larger themes."--BOOK JACKET.