PARSEC
Extensible language with PL/I-like syntax, derived from PROTEUS. "PARSEC User's 
Manual", Bolt Beranek & Newman (Dec 1972).
 
  
 
  
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parser
<language> An algorithm or program to determine the syntactic structure 
of a sentence or string of symbols in some language. A parser normally takes as 
input a sequence of tokens output by a lexical analyser. It may produce some 
kind of abstract syntax tree as output. One of the best known parser generators 
is yacc.
 
(1997-07-21)
 
  
 
  
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parser generator
A program which takes a formal description of a grammar (e.g. in BNF) and 
outputs source code for a parser which will recognise valid strings obeying that 
grammar and perform associated actions. Unix's yacc is a well known example.
 
  
 
  
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