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  2. Lex (software) - Wikipedia

    en.wikipedia.org/wiki/Lex_(software)

    Lex is a computer program that generates lexical analyzers ("scanners" or "lexers"). [1] [2] It is commonly used with the yacc parser generator and is the standard lexical analyzer generator on many Unix and Unix-like systems. An equivalent tool is specified as part of the POSIX standard. [3]

  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. Lexical analysis - Wikipedia

    en.wikipedia.org/wiki/Lexical_analysis

    Tokens are often defined by regular expressions, which are understood by a lexical analyzer generator such as lex, or handcoded equivalent finite-state automata. The lexical analyzer (generated automatically by a tool like lex or hand-crafted) reads in a stream of characters, identifies the lexemes in

  5. 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 ...

  6. GNU Bison - Wikipedia

    en.wikipedia.org/wiki/GNU_bison

    Flex, an automatic lexical analyser, is often used with Bison, to tokenise input data and provide Bison with tokens. [5] Bison was originally written by Robert Corbett in 1985. [1] Later, in 1989, Robert Corbett released another parser generator named Berkeley Yacc. Bison was made Yacc-compatible by Richard Stallman. [6]

  7. Parents Accused of Leaving Toddler in Closet Overnight with ...

    www.aol.com/parents-accused-leaving-toddler...

    Two Indiana parents are in custody after allegedly leaving their 2-year-old daughter in a closet overnight with a space heater turned all the way up.

  8. Donald Trump will be assuming the office of U.S. president on Jan. 20, 2025, and his return to the role could usher in a wide variety of economic changes.

  9. History of compiler construction - Wikipedia

    en.wikipedia.org/wiki/History_of_compiler...

    Yacc is a parser generator (loosely, compiler-compiler), not to be confused with lex, which is a lexical analyzer frequently used as a first stage by Yacc. Yacc was developed by Stephen C. Johnson at AT&T for the Unix operating system. [45] The name is an acronym for "Yet Another Compiler Compiler." It generates an LALR(1) compiler based on a ...