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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 .)
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").
This is a list of free and open-source software packages , computer software licensed under free software licenses and open-source licenses. Software that fits the Free Software Definition may be more appropriately called free software ; the GNU project in particular objects to their works being referred to as open-source . [ 1 ]
List of free analog and digital electronic circuit simulators, available for Windows, macOS, Linux, and comparing against UC Berkeley SPICE.The following table is split into two groups based on whether it has a graphical visual interface or not.
In computer science and formal methods, a SAT solver is a computer program which aims to solve the Boolean satisfiability problem.On input a formula over Boolean variables, such as "(x or y) and (x or not y)", a SAT solver outputs whether the formula is satisfiable, meaning that there are possible values of x and y which make the formula true, or unsatisfiable, meaning that there are no such ...
Windows 2011 2011-07-26 Proprietary: OpenMDX: cross-platform (Java) 2004-01-28 2.4 2009-03-26 BSD: Scriptcase: Scriptcase Corp. PHP Unix, Linux, Windows, iOS 2000 9.7 2022-04-13 Proprietary: T4: Microsoft: Windows 2005 2010 MIT License: Umple: University of Ottawa: cross-platform (Java) 2010 1.35.0 2024-10-11 MIT License: Velocity apache ...
1–2 bit integer interpreted as boolean. Boolean sign, plus arbitrary length 7-bit octets, parsed until most-significant bit is 0, in little-endian. The schema can set the zero-point to any arbitrary number. Unsigned skips the boolean flag.
The basic datatypes handled by Snowball are strings of characters, signed integers, and boolean truth values, or more simply strings, integers and booleans. Snowball's characters are either 8-bit wide, or 16-bit, depending on the mode of use. In particular, both ASCII and 16-bit Unicode are supported.