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-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-/*
-
-Goyacc is a version of yacc for Go.
-It is written in Go and generates parsers written in Go.
-
-It is largely transliterated from the Inferno version written in Limbo
-which in turn was largely transliterated from the Plan 9 version
-written in C and documented at
-
- http://plan9.bell-labs.com/magic/man2html/1/yacc
-
-Yacc adepts will have no trouble adapting to this form of the tool.
-
-The file units.y in this directory is a yacc grammar for a version of
-the Unix tool units, also written in Go and largely transliterated
-from the Plan 9 C version. It needs the flag "-p units_" (see
-below).
-
-The generated parser is reentrant. Parse expects to be given an
-argument that conforms to the following interface:
-
- type yyLexer interface {
- Lex(lval *yySymType) int
- Error(e string)
- }
-
-Lex should return the token identifier, and place other token
-information in lval (which replaces the usual yylval).
-Error is equivalent to yyerror in the original yacc.
-
-Code inside the parser may refer to the variable yylex,
-which holds the yyLexer passed to Parse.
-
-Multiple grammars compiled into a single program should be placed in
-distinct packages. If that is impossible, the "-p prefix" flag to
-goyacc sets the prefix, by default yy, that begins the names of
-symbols, including types, the parser, and the lexer, generated and
-referenced by goyacc's generated code. Setting it to distinct values
-allows multiple grammars to be placed in a single package.
-
-*/
-package documentation