pj2
Class Parser

Object
  Utils
      Parser

public class Parser
extends Utils

factory to represent a grammar in jay-style BNF.

Version:

2.0.0

Nested Class Summary

class	Parser.Id references a Pattern, a Rule, or error by name.
class	Parser.Left %left
class	Parser.Level base class for precedence levels.
class	Parser.Literal references a Symbol.
class	Parser.Node basic behavior for the grammar tree: an immutable List.
class	Parser.Nonassoc %nonassoc
class	Parser.Pattern represents an optionally typed token terminal.
class	Parser.Right %right
class	Parser.Rule represents an optionally typed grammar rule.
class	Parser.Sequence one alternative of a rule with optional %prec terminal.
class	Parser.Symbol represents a literal terminal.
class	Parser.Type represents type information.

Field Summary

protected HashMap<String,Object>	defined maps Id name to null, Pattern, or Rule.
protected String	epilog prolog and epilog code.
protected ArrayList<Parser.Level>	levels collects Levels in order of definition.
protected ArrayList<Parser.Pattern>	patterns collects Patterns in order of definition.
protected String	prolog prolog and epilog code.
protected ArrayList<Parser.Rule>	rules collects Rules in order of definition.
protected int	start if >= 0: index of rule for start symbol.
protected HashMap<String,Parser.Symbol>	symbols collects Symbol strings.
protected ArrayList<String>	yyNames maps pattern and symbol numbers to names.

Fields inherited from class Utils

error

Constructor Summary

Parser()

Method Summary

Parser.Id	id(int position, String name) factory method.
Parser.Level	level(int position, String assoc, Parser.Node... nodes) factory method.
Parser.Literal	literal(int position, String value) factory method.
Parser.Pattern	pattern(int position, Parser.Type type, String name, String value) factory method.
Parser.Rule	rule(int position, Parser.Type type, String name, Parser.Node... nodes) factory method.
Parser.Sequence	sequence(int position, Parser.Node prec, Parser.Node... nodes) factory method.
Parser.Sequence	sequence(int position, String flags, Parser.Node prec, Parser.Node... nodes) factory method.
Parser.Type	type(int position, String name, boolean flatten, String... interfaces) factory method.

Methods inherited from class Utils

className, error, error, error, fromString, getError, message, toChars, toString, warning, warning, warning

Methods inherited from class Object

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

Field Detail

prolog

protected String prolog

prolog and epilog code.

epilog

protected String epilog

prolog and epilog code.

yyNames

protected final ArrayList<String> yyNames

maps pattern and symbol numbers to names. Initialized with [eof], 255* null, error.

symbols

protected final HashMap<String,Parser.Symbol> symbols

collects Symbol strings. These strings are unique and should take precedence over patterns in the scanner.

patterns

protected final ArrayList<Parser.Pattern> patterns

collects Patterns in order of definition. There might be more for macros (untyped) and skips (void).

defined

protected final HashMap<String,Object> defined

maps Id name to null, Pattern, or Rule.

levels

protected final ArrayList<Parser.Level> levels

collects Levels in order of definition.

rules

protected final ArrayList<Parser.Rule> rules

collects Rules in order of definition.

start

protected int start

if >= 0: index of rule for start symbol.

Constructor Detail

Parser

public Parser()

Method Detail

pattern

public Parser.Pattern pattern(int position,
                              Parser.Type type,
                              String name,
                              String value)

factory method.

rule

public Parser.Rule rule(int position,
                        Parser.Type type,
                        String name,
                        Parser.Node... nodes)

factory method.

type

public Parser.Type type(int position,
                        String name,
                        boolean flatten,
                        String... interfaces)

factory method.

sequence

public Parser.Sequence sequence(int position,
                                Parser.Node prec,
                                Parser.Node... nodes)

factory method.

sequence

public Parser.Sequence sequence(int position,
                                String flags,
                                Parser.Node prec,
                                Parser.Node... nodes)

factory method.

id

public Parser.Id id(int position,
                    String name)

factory method.

literal

public Parser.Literal literal(int position,
                              String value)

factory method.

level

public Parser.Level level(int position,
                          String assoc,
                          Parser.Node... nodes)

factory method. Complains about an unknown associativity.