pj2
Class BnfBuilder

Object
  BnfBuilder

Direct Known Subclasses:

RfcBuilder

public class BnfBuilder
extends Object

builder for recognizer built from bnf.rfc.

Version:

2.0.1

Field Summary

protected Parser

parser factory for the tree to represent the grammar.

Constructor Summary

BnfBuilder()

Method Summary

Parser.Id	id(int position, List args) id: Id;
Parser.Level	level(int position, List args) level: '%' Id ( id | literal )+ ';'; The first Id must be left, right, or nonassoc.
Parser.Literal	literal(int position, List args) literal: Literal;
Parser	parser(List args) parser: Prolog rule+ Epilog;
Parser.Node	prec(int position, List args) prec: '%' Id ( id | literal ); The first Id must be prec.
Parser.Node	rule(int position, List args) rule: type?
Parser.Node	sequence(int position, List args) sequence: term+ prec?
Parser.Type	type(int position, List args) type: '<' Id ( ':' Id +/ ',' )?

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

parser

protected Parser parser

factory for the tree to represent the grammar.

Constructor Detail

BnfBuilder

public BnfBuilder()

Method Detail

parser

public Parser parser(List args)

parser: Prolog rule+ Epilog;

Returns:

the complete parser or null on error.

rule

public Parser.Node rule(int position,
                        List args)

rule: type? Id ( pattern | rhs ) ';' | level;
pattern: '=' String;
rhs: ':' ( '|'? sequence +/ '|' )?;

Returns:

Level, Pattern, or Rule.

type

public Parser.Type type(int position,
                        List args)

type: '<' Id ( ':' Id +/ ',' )? '>' '?'?;

Returns:

Parser.Type.

sequence

public Parser.Node sequence(int position,
                            List args)

sequence: term+ prec?;

id

public Parser.Id id(int position,
                    List args)

id: Id;

literal

public Parser.Literal literal(int position,
                              List args)

literal: Literal;

prec

public Parser.Node prec(int position,
                        List args)

prec: '%' Id ( id | literal );

The first Id must be prec.

Returns:

Parser.Literal or Parser.Pattern Parser.Id.

level

public Parser.Level level(int position,
                          List args)

level: '%' Id ( id | literal )+ ';';

The first Id must be left, right, or nonassoc.