At least for the people who send me mail about a new language that they're designing, the general advice is: do it to learn about how to write a compiler. Don't have any expectations that anyone will use it, unless you hook up with some sort of organization in a position to push it hard.

It's a lottery, and some can buy a lot of the tickets. There are plenty of beautiful languages (more beautiful than C) that didn't catch on. But someone does win the lottery, and doing a language at least teaches you something.(1941-2011) Creator of the programming language and of 竜 TatSu. Def WARNING:' TatSu =5.0.0 requires Python=3.8 Python 3.8 introduced new language features that allow writing better programs more clearly, and all code compatible with Python 3.7 should run fine on 3.8 with minor, or no changes.

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Tatsu is the right hand ninja of the Shredder and the secondary antagonist in the 1990 Teenage Mutant Ninja Turtles movie and its 1991 sequel, and a minor antagonist in the fifth season of the 2012 TV series. He was portrayed by Toshishiro Obata in the 1990 film.

Python has adopted an anual release schedule (PEP-602). $ pip install TatSu Using the Tool竜 TatSu can be used as a library, much like 's re, by embedding grammars as strings and generating grammar models instead of generating code.tatsu.compile(grammar, name=None,.kwargs)Compiles the grammar and generates a model that can subsequently be used for parsing input with.tatsu.parse(grammar, input,.kwargs)Compiles the grammar and parses the given input producing an as result.

The result is equivalent to calling: model = compile(grammar)ast = model.parse(input)Compiled grammars are cached for efficiency.tatsu.topythonsourcecode(grammar, name=None, filename=None,.kwargs)Compiles the grammar to the sourcecode that implements the parser.This is an example of how to use 竜 TatSu as a library. GRAMMAR = ' @@grammar::CALC start = expression $; expression = expression '+' term expression '-' term term; term = term '.' factor term '/' factor factor; factor = '(' expression ')' number; number = /d+/; ' if name 'main ':import pprintimport jsonfrom tatsu import parsefrom tatsu.util import asjsonast = parse( GRAMMAR, '3 + 5. ( 10 - 20 ) ')print( '# PPRINT ')pprint.pprint(ast, indent = 2, width = 20)printprint( '# JSON ')print(json.dumps(asjson(ast), indent = 2))print竜 TatSu will use the first rule defined in the grammar as the start rule.This is the output. # PPRINT '3', '+'5', '.' 10', '-', '20'# JSON '3', '+'5', '.' 10', '-', '20' DocumentationFor a detailed explanation of what 竜 TatSu is capable of, please see the.

Questions?Please use the tag on for general Q&A, and limit Github issues to bugs, enhancement proposals, and feature requests. ChangesSee the for details. LicenseYou may use 竜 TatSu under the terms of the -style license described in the enclosed file. If your project requires different licensing please.