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A classic example of a problem which a regular grammar cannot handle is the question of whether a given string contains correctly nested parentheses. (This is typically handled by a Chomsky Type 2 grammar, also termed a context-free grammar .)
JavaCC (Java Compiler Compiler) is an open-source parser generator and lexical analyzer generator written in the Java programming language. [2] JavaCC is similar to yacc in that it generates a parser from a formal grammar written in EBNF notation. Unlike yacc, however, JavaCC generates top-down parsers.
Coco/R is a compiler generator that takes wirth syntax notation [1]: 6 [note 1] grammars of a source language and generates a scanner and a parser for that language. [1] The scanner works as a deterministic finite automaton. It supports Unicode characters in UTF-8 encoding and can be made case-sensitive or case-insensitive. It can also ...
Normally the generated scanner contains references to the unistd.h header file, which is Unix specific. To avoid generating code that includes unistd.h, %option nounistd should be used. Another issue is the call to isatty (a Unix library function), which can be found in the generated code.
Java JavaScript — — ASP, PHP, HTML, CSS, ColdFusion, COBOL: Yet Another Source Code Analyzer, a plugin-based framework to scan arbitrary file types, with plugins. It integrates with other scanners, including FindBugs, PMD, and Pixy. Tool Release Free software Supported languages Notes
For example, in the text string: The quick brown fox jumps over the lazy dog. the string is not implicitly segmented on spaces, as a natural language speaker would do. The raw input, the 43 characters, must be explicitly split into the 9 tokens with a given space delimiter (i.e., matching the string " "or regular expression /\s{1}/).
Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers write once, run anywhere (), [16] meaning that compiled Java code can run on all platforms that support Java without the need to recompile. [17]
Autopsy includes a graphical user interface to display its results, wizards and historical tools to repeat configuration steps, and plug-in support. Both open-source and closed-source Modules exist for the core browser, including functionality related to scanning files, browsing results, and summarizing findings.