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[ Source: frown  ]

Package: frown (0.6.2.3-2)

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LALR(k) parser generator

Frown is an LALR(k) parser generator for Haskell 98 written in Haskell 98.

Its salient features are:

   -  The generated parsers are time and space efficient. On the downside, the
      parsers are quite large.
   -  Frown generates four different types of parsers. as a common
      characteristic, the parsers are genuinely functional (ie ‘table-free’);
      the states of the underlying LR automaton are encoded as mutually
      recursive functions. Three output formats use a typed stack
      representation, and one format due to Ross Paterson (code=stackless)
      works even without a stack.
   -  Encoding states as functions means that each state can be treated
      individually as opposed to a table-driven approach, which necessitates a
      uniform treatment of states. For instance, look-ahead is only used when
      necessary to resolve conflicts.
   -  Frown comes with debugging and tracing facilities; the standard output
      format due to Doaitse Swierstra (code=standard) may be useful for
      teaching LR parsing.
   -  Common grammatical patterns such as repetition of symbols can be
      captured using rule schemata. There are several predefined rule
      schemata.
   -  Terminal symbols are arbitrary variable-free Haskell patterns or guards.
      Both terminal and nonterminal symbols may have an arbitrary number of
      synthesized attributes.
   -  Frown comes with extensive documentation; several example grammars are
      included. Furthermore, Frown supports the use of monadic lexers, monadic
      semantic actions, precedences, and associativity, the generation of
      backtracking parsers, multiple start symbols, error reporting, and a
      weak form of error correction.

Tags: Software Development: Code Generation, Haskell Development, Implemented in: implemented-in::haskell, interface::commandline, Role: Program, Scope: scope::utility, works-with::software:source

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Download frown

Download for all available architectures
Architecture Package Size Installed Size Files
alpha (unofficial port) 1,482.7 kB12,960.0 kB [list of files]
amd64 437.3 kB2,337.0 kB [list of files]
arm64 1,091.6 kB9,105.0 kB [list of files]
armhf 1,014.3 kB6,199.0 kB [list of files]
hppa (unofficial port) 1,656.7 kB14,399.0 kB [list of files]
hurd-i386 838.8 kB4,255.0 kB [list of files]
i386 434.7 kB1,866.0 kB [list of files]
kfreebsd-amd64 838.1 kB5,358.0 kB [list of files]
kfreebsd-i386 842.9 kB4,276.0 kB [list of files]
m68k (unofficial port) 978.5 kB8,437.0 kB [list of files]
mips 1,028.3 kB10,542.0 kB [list of files]
mips64el 1,385.4 kB12,559.0 kB [list of files]
mipsel 1,085.1 kB10,550.0 kB [list of files]
powerpc 389.5 kB2,302.0 kB [list of files]
ppc64 (unofficial port) 968.4 kB11,092.0 kB [list of files]
ppc64el 980.8 kB10,769.0 kB [list of files]
s390x 1,579.2 kB12,469.0 kB [list of files]
sparc64 (unofficial port) 881.4 kB8,135.0 kB [list of files]
x32 (unofficial port) 2,126.6 kB8,599.0 kB [list of files]