grammar analyzer

A Mathematical Expression Calculator developed based on the grammar analyzer GOLD Parser and a parser Expression Calculator Recently found a grammar analysis artifact, read the official website (http://goldparser.org/) after the introduction of the feeling very sharp look, so it was used to test some, write a Mathematical Expression Analysis of small programs, t

A notable feature of the prediction-based Grammar analyzer is to define a non-Terminator as a parsing function (method). When a non-terminator can be derived as another non-Terminator, recursively call the parsing function. One disadvantage of this method is that it is difficult to handle the situation that requires backtracking. We will analyze it in detail later. The last time we studied the parsing of in

1, first read into the Terminator, non-Terminator, and all production type.2, pre-processing: initialization; GETPP () obtains the number of each non-terminator on the left of the production type,Recorded in string getp[] (can be multiple).3. Get the first set of all the symbols: DFS, starting from S DFS, encountering Terminator is a recursive exit, back-to-back time to save records on the entire path of VN first, (encountered with left recursion, continue, left recursive production without affe

ArticleDirectory 2.1 Basic lexical analyzer 2.2 lexical analyzer supporting fixed-length forward symbols 2.3 lexical analyzer supporting extended forward symbols 2.4 support for reject-initiated lexical analyzer 3.1 Calculator 3.2 string 3.3 escape string Series navigation (1)

The previous article describes the transformation of expressions into a list of Tokenrecord objects through lexical analysis. In the first article, the expression is represented by a tree structure, and then it is convenient to compute the value

Reprinted from: Cardiac Note (http://493420337.iteye.com/blog/593981)--------------------------------------------------------------------------------------------------------------- --------------------------------------------------Chomsky divides the method into four types, namely, type 0, 1, 2 and type 3. The concept of these types of grammar must be mastered and is a very important test center. For these kinds of

Now the core of the DFA has been successfully constructed, the final step is based on the DFA to obtain a complete lexical analyzer. Since it is not yet possible to support a lexical definition file like Flex, you still need to define the rules in your program and not be very flexible in customizing the lexical analyzer, but the basics are sufficient. Definition of lexical rules All the rules used by the

Note: Based on lucene5.5.x version One, simple introduction of IK Analyzer IK Analyzer is linliangyi2007 's work, and then thanks for his blog address:http://linliangyi2007.iteye.com/ IK Analyzer supports two participle, one is the most fine-grained participle (recommended use, IK default to use the most fine-grained), there is a kind of intelligent participle (

Spectrum Analyzer is the use of frequency domain to analyze and study the signal of a measuring instrument, for signal analysis it is indispensable, with the rapid development of communication technology, more and more field operations need to support the spectrum instrument (Spectrum Analyzer type), such as communication transmitters and interference signal measurement, spectrum monitoring, The characteris

Use the Api analyzer and the Windows compatibility package to write smart cross-platform. NET Core applications. The api Analyzer This article is translated from Scott Hanselman's blog: Https://www.hanselman.com/blog/WritingSmarterCrossplatformNETCoreAppsWithTheAPIAnalyzerAndWindowsCompatibilityPack.aspx Body: This is a pair of excellent. Net Core tools you should know in recent weeks. They are very helpf

Detailed explanation of Yahoo's MySQL Performance Analyzer, yahoomysql AnalyzerDetailed explanation of Yahoo's MySQL Performance Analyzer Author: chszs, reprinted to be noted. Blog homepage: http://blog.csdn.net/chszs一、introduction Yahoo opened its MySQL Performance Analyzer on the previous day and its source code is hosted on GitHub. This performance

SharePoint configuration analyzer (sca.exe)-SharePointConfiguration Analyzer Translated by: Rickie Lee (rickieleemail at Yahoo.com) Jan. 1, 2005 Overview SharePoint configuration analyzer is a diagnostic tool used to verify running WSS or SPS and some key settings that host Web parts. SharePoint configuration analyz