http://code.activestate.com/recipes/tags/language/2016-12-11T16:28:50-08:00ActiveState Code Recipes2016-12-11T16:28:50-08:00Vasudev Ramhttp://code.activestate.com/recipes/users/4173351/http://code.activestate.com/recipes/580730-simulate-cs-switch-statement/

<p style="color: grey"> Python recipe 580730 by <a href="/recipes/users/4173351/">Vasudev Ram</a> (<a href="/recipes/tags/c/">c</a>, <a href="/recipes/tags/features/">features</a>, <a href="/recipes/tags/language/">language</a>, <a href="/recipes/tags/python/">python</a>, <a href="/recipes/tags/switch/">switch</a>). </p> <p>This recipe shows a Python construct that can behave somewhat like C's switch statement. It is not a perfect one-to-one simulation. But it does have some of the features of the C switch. One feature not supported is the fall-through feature in C's switch.</p>

2013-07-22T23:53:44-07:00Andrew Wayne Teesdale Jr.http://code.activestate.com/recipes/users/4187305/http://code.activestate.com/recipes/578617-small-stack-language/

<p style="color: grey"> Python recipe 578617 by <a href="/recipes/users/4187305/">Andrew Wayne Teesdale Jr.</a> (<a href="/recipes/tags/language/">language</a>, <a href="/recipes/tags/stack/">stack</a>). </p> <p>a small language in python</p>

2012-03-27T19:30:47-07:00Shea Kauffmanhttp://code.activestate.com/recipes/users/4168682/http://code.activestate.com/recipes/578087-useful-unrestricted-grammar/

<p style="color: grey"> Python recipe 578087 by <a href="/recipes/users/4168682/">Shea Kauffman</a> (<a href="/recipes/tags/dict/">dict</a>, <a href="/recipes/tags/dictionary/">dictionary</a>, <a href="/recipes/tags/grammar/">grammar</a>, <a href="/recipes/tags/grammer/">grammer</a>, <a href="/recipes/tags/language/">language</a>, <a href="/recipes/tags/thue/">thue</a>, <a href="/recipes/tags/turing_machine/">turing_machine</a>, <a href="/recipes/tags/unrestricted/">unrestricted</a>). </p> <p>This is an implementation of an easy to use unrestricted grammar. It could be used for quickly prototyping a DSL, testing a post-formal system, or parsing test in a way that requires context. It would however be extremely slow for simple substitutions.</p>

2010-08-22T19:05:09-07:00Jack Trainorhttp://code.activestate.com/recipes/users/4076953/http://code.activestate.com/recipes/577366-trac-interpreter-sixties-programming-language/

<p style="color: grey"> Python recipe 577366 by <a href="/recipes/users/4076953/">Jack Trainor</a> (<a href="/recipes/tags/algorithm/">algorithm</a>, <a href="/recipes/tags/educational/">educational</a>, <a href="/recipes/tags/interpreter/">interpreter</a>, <a href="/recipes/tags/language/">language</a>, <a href="/recipes/tags/trac/">trac</a>). </p> <p>A Python implementation of an interpreter for the TRAC programming language developed by Calvin Mooers in the early 1960s. This implementation reconstructs Mooers' original algorithm in Python and supports only a limited number of TRAC primitives for demonstration purposes.</p>

2010-09-20T00:42:21-07:00Jack Trainorhttp://code.activestate.com/recipes/users/4076953/http://code.activestate.com/recipes/577396-trac-interpreter-dragon-style/

<p style="color: grey"> Python recipe 577396 by <a href="/recipes/users/4076953/">Jack Trainor</a> (<a href="/recipes/tags/algorithm/">algorithm</a>, <a href="/recipes/tags/educational/">educational</a>, <a href="/recipes/tags/interpreter/">interpreter</a>, <a href="/recipes/tags/language/">language</a>, <a href="/recipes/tags/lexical_analyzer/">lexical_analyzer</a>, <a href="/recipes/tags/trac/">trac</a>). </p> <p>I've rewritten the TRAC interpreter from <a href="http://code.activestate.com/recipes/577366/">Recipe 577366</a> using a modern recursive descent style based on the Dragon book's lexer/parser model at the end of "Compliers: Principles, Techniques and Tools," Chapter 2, by Aho, Sethi, Ullman (1986).</p>

2010-09-20T01:16:07-07:00Jack Trainorhttp://code.activestate.com/recipes/users/4076953/http://code.activestate.com/recipes/577397-trac-interpreter-class-and-stack-version/

<p style="color: grey"> Python recipe 577397 by <a href="/recipes/users/4076953/">Jack Trainor</a> (<a href="/recipes/tags/algorithm/">algorithm</a>, <a href="/recipes/tags/educational/">educational</a>, <a href="/recipes/tags/interpreter/">interpreter</a>, <a href="/recipes/tags/language/">language</a>, <a href="/recipes/tags/lexical_analyzer/">lexical_analyzer</a>, <a href="/recipes/tags/trac/">trac</a>). </p> <p>This is my third and final version of the Trac Interpreter from <a href="http://code.activestate.com/recipes/577366/">Recipe 577366</a>. It processes the character stream into appropriate class objects and stores these objects on a stack.</p>

2009-01-04T19:10:28-08:00Shea Kauffmanhttp://code.activestate.com/recipes/users/4168682/http://code.activestate.com/recipes/576606-unrestricted-grammar-used-like-a-dictionary/

<p style="color: grey"> Python recipe 576606 by <a href="/recipes/users/4168682/">Shea Kauffman</a> (<a href="/recipes/tags/dict/">dict</a>, <a href="/recipes/tags/dictionary/">dictionary</a>, <a href="/recipes/tags/grammar/">grammar</a>, <a href="/recipes/tags/grammer/">grammer</a>, <a href="/recipes/tags/language/">language</a>, <a href="/recipes/tags/thue/">thue</a>, <a href="/recipes/tags/turing_machine/">turing_machine</a>). </p> <p>Programs can be written as substitutions. This allows a set of substitution rules to be defined and then strings are transformed using these rules in a left recursive manner.</p>