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  2. Lexical analysis - Wikipedia

    en.wikipedia.org/wiki/Lexical_analysis

    Lexical tokenization is the conversion of a raw text into (semantically or syntactically) meaningful lexical tokens, belonging to categories defined by a "lexer" program, such as identifiers, operators, grouping symbols, and data types. The resulting tokens are then passed on to some other form of processing.

  3. Flex (lexical analyser generator) - Wikipedia

    en.wikipedia.org/wiki/Flex_(lexical_analyser...

    Flex (fast lexical analyzer generator) is a free and open-source software alternative to lex. [2] It is a computer program that generates lexical analyzers (also known as "scanners" or "lexers").

  4. RIPS - Wikipedia

    en.wikipedia.org/wiki/RIPS

    The commercial version supported analysis of PHP and Java code. In order to identify security vulnerabilities that are based on second-order data flows or misplaced security mechanisms, it used abstract syntax trees, control-flow graphs, and context-sensitive taint analysis [7] It could automatically detect 200 different vulnerability types, code quality issues and misconfiguration weaknesses.

  5. Lexical grammar - Wikipedia

    en.wikipedia.org/wiki/Lexical_grammar

    For instance, the lexical grammar for many programming languages specifies that a string literal starts with a " character and continues until a matching " is found (escaping makes this more complicated), that an identifier is an alphanumeric sequence (letters and digits, usually also allowing underscores, and disallowing initial digits), and ...

  6. Ragel - Wikipedia

    en.wikipedia.org/wiki/Ragel

    Ragel is a finite-state machine compiler and a parser generator.Initially Ragel supported output for C, C++ and Assembly source code, [4] later expanded to support several other languages including Objective-C, D, Go, Ruby, and Java. [5]

  7. Preprocessor - Wikipedia

    en.wikipedia.org/wiki/Preprocessor

    grompp, a preprocessor for simulation input files for GROMACS (a fast, free, open-source code for some problems in computational chemistry) which calls the system C preprocessor (or other preprocessor as determined by the simulation input file) to parse the topology, using mostly the #define and #include mechanisms to determine the effective ...

  8. RE/flex - Wikipedia

    en.wikipedia.org/wiki/Re/flex

    The RE/flex lexical analyzer generator accepts an extended syntax of Flex lexer specifications as input. The RE/flex specification syntax is more expressive than the traditional Flex lexer specification syntax and may include indentation anchors, word boundaries, lazy quantifiers (non-greedy, lazy repeats), and new actions such as wstr() to ...

  9. Multi-pass compiler - Wikipedia

    en.wikipedia.org/wiki/Multi-pass_compiler

    This stage of a multi-pass compiler is to remove irrelevant information from the source program that syntax analysis will not be able to use or interpret. Irrelevant information could include things like comments and white space. In addition to removing the irrelevant information, the lexical analysis determines the lexical tokens of the language.