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  • Possible typos in ECMAScript 5 specification?

    - by Andy West
    Does anybody know why, at the end of section 7.6 of the ECMA-262, 5th Edition specification, the nonterminals UnicodeLetter, UnicodeCombiningMark, UnicodeDigit, UnicodeconnectorPunctuation, and UnicodeEscapeSequence are not followed by two colons? From section 5.1.6: Nonterminal symbols are shown in italic type. The definition of a

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  • ANTLR, optional ';' in JavaScript

    - by vava
    I'm just playing with ANTLR and decided to try parsing JavaScript with it. But I hit the wall in dealing with optional ';' in it, where statement end is marked by newline instead. Can it be done in some straightforward way? Just a simple grammar example that doesn't work grammar optional_newline; def : statements ;

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  • Lexing partial SQL in C#

    - by Chris T
    I'd need to parse partial SQL queries (it's for a SQL injection auditing tool). For example '1' AND 1=1-- Should break down into tokens like [0] => [SQL_STRING, '1'] [1] => [SQL_AND] [2] => [SQL_INT, 1] [3] => [SQL_AND] [4] => [SQL_INT, 1] [5] => [SQL_COMMENT] [6] => [SQL_QUERY_END] Are their any

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  • n-grams from text in PostgreSQL

    - by harshsinghal
    I am looking to create n-grams from text column in PostgreSQL. I currently split(on white-space) data(sentences) in a text column to an array. select regexp_split_to_array(sentenceData,E'\s+') from tableName Once I have this array, how do I go about: Creating a loop to find n-grams, and write each to a row in

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  • Processing an n-ary ANTLR AST one child at a time

    - by Chris Lieb
    I currently have a compiler that uses an AST where all children of a code block are on the same level (ie, block.children == {stm1, stm2, stm3, etc...}). I am trying to do liveness analysis on this tree, which means that I need to take the value returned from the processing of stm1 and then pass it to stm2, then

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  • lexer skips a token

    - by Eugene Strizhok
    I am trying to do basic ANTLR-based scanning. I have a problem with a lexer not matching wanted tokens. lexer grammar DefaultLexer; ALPHANUM : (LETTER | DIGIT)+; ACRONYM : LETTER '.' (LETTER '.')+; HOST : ALPHANUM (('.' | '-') ALPHANUM)+; fragment LETTER : UNICODE_CLASS_LL |

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  • If item not in the lst in scheme

    - by ms. sakura
    I'm working on context-free grammars, and I have a function that returns the (terminal values of grammar) for example: i have non-terminal function that results in (A B) , from calling say ((A cat) (B happy np) (A B sad)) so technically A and B are non terminals of the grammar. Now I want to be able

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  • Download Irony .NET Compiler Construction Kit

    - by Editor
    Irony is a new-generation .NET compiler construction kit. It utilizes the full potential of c# 2.0 and .NET Framework to implement a completely new and streamlined technology of compiler construction. Unlike most existing yacc/lex-style solutions Irony does not employ any scanner or parser code

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  • Business Choices and Evony

    - by Robert May
    Recently, I’ve been playing a game called Evony, and I finally decided to quit the game and thought I should warn others who might be tempted.  I also find a lot of insight with this game as an example.  A few of the companies that I’ve worked with or worked for have been like this and

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  • Wiki .NET Parser, C#

    Wiki .NET Parser C#, 3 (4) files with lexer, grammar, parser definition and ANTLR engine...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • vi and emacs: comparison? (not flamebait!)

    - by jared
    So, I've been enjoying learning and using vi for the last couple of years. The beauty of vi, for me, is that its UI is a language of movement and action with a very uniform, simple grammar, and which is terse enough that the requisite memorization pays ample dividends in how much more I enjoy

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  • CodePlex Daily Summary for Sunday, December 19, 2010

    CodePlex Daily Summary for Sunday, December 19, 2010Popular ReleasesTeam Foundation Server Administration Tool: 2.1: TFS Administration Tool 2.1, is the first version of the TFS Administration Tool which is built on top of the Team Foundation Server 2010 object model. TFS Administration Tool

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  • antlr line after line processing

    - by pawloch
    I'm writing simple language in ANTLR, and I'd like to write shell where I can put line of code, hit ENTER and have it executed, enter another line, and have it executed. I have already written grammar which execute all alines of input at one. Example input: int a,b,c; string d; string e;

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  • Getting tree construction with ANTLR

    - by prosseek
    As asked and answered in http://stackoverflow.com/questions/2999755/removing-left-recursion-in-antlr , I could remove the left recursion E - E + T|T T - T * F|F F - INT | ( E ) After left recursion removal, I get the following one E - TE' E' - null | + TE' T

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