Class ASTParser

java.lang.Object
  java_cup.runtime.lr_parser
      ASTParser

public class ASTParser

extends lr_parser

CUP v0.10k generated parser.

Field Summary

protected static short[][]	_action_table Parse-action table.
protected static short[][]	_production_table Production table.
protected static short[][]	_reduce_table reduce_goto table.
protected CUP$ASTParser$actions	action_obj Instance of action encapsulation class.

Fields inherited from class java_cup.runtime.lr_parser

_done_parsing, _error_sync_size, action_tab, cur_token, lookahead, lookahead_pos, production_tab, reduce_tab, stack, tos

Constructor Summary

ASTParser()
Default constructor.

ASTParser(Scanner s)
Constructor which sets the default scanner.

Method Summary

short[][]	action_table() Access to parse-action table.
Symbol	do_action(int act_num, lr_parser parser, java.util.Stack stack, int top) Invoke a user supplied parse action.
int	EOF_sym() EOF Symbol index.
int	error_sym() error Symbol index.
protected void	init_actions() Action encapsulation object initializer.
short[][]	production_table() Access to production table.
short[][]	reduce_table() Access to reduce_goto table.
int	start_production() Indicates start production.
int	start_state() Indicates start state.
void	syntax_error(Symbol cur_token) This method is called when a syntax error has been detected and recovery is about to be invoked.
void	unrecovered_syntax_error(Symbol cur_token) This method is called if it is determined that syntax error recovery has been unsuccessful.

Methods inherited from class java_cup.runtime.lr_parser

advance_lookahead, cur_err_token, debug_message, debug_parse, debug_reduce, debug_shift, debug_stack, done_parsing, dump_stack, error_recovery, error_sync_size, find_recovery_config, get_action, get_reduce, getScanner, parse_lookahead, parse, read_lookahead, report_error, report_fatal_error, restart_lookahead, scan, setScanner, shift_under_error, try_parse_ahead, unpackFromStrings, user_init

Methods inherited from class java.lang.Object

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

Field Detail

_production_table

protected static final short[][] _production_table

Production table.

_action_table

protected static final short[][] _action_table

Parse-action table.

_reduce_table

protected static final short[][] _reduce_table

reduce_goto table.

action_obj

protected CUP$ASTParser$actions action_obj

Instance of action encapsulation class.

Constructor Detail

ASTParser

public ASTParser()

Default constructor.

ASTParser

public ASTParser(Scanner s)

Constructor which sets the default scanner.

Method Detail

production_table

public short[][] production_table()

Access to production table.

Specified by:

production_table in class lr_parser

action_table

public short[][] action_table()

Access to parse-action table.

Specified by:

action_table in class lr_parser

See Also:

lr_parser.get_action(int, int)

reduce_table

public short[][] reduce_table()

Access to reduce_goto table.

Specified by:

reduce_table in class lr_parser

See Also:

lr_parser.get_reduce(int, int)

init_actions

protected void init_actions()

Action encapsulation object initializer.

Specified by:

init_actions in class lr_parser

do_action

public Symbol do_action(int act_num,
                        lr_parser parser,
                        java.util.Stack stack,
                        int top)
                 throws java.lang.Exception

Invoke a user supplied parse action.

Specified by:

do_action in class lr_parser

Parameters:

act_num - the internal index of the action to be performed.

parser - the parser object we are acting for.

stack - the parse stack of that object.

top - the index of the top element of the parse stack.

Throws:

java.lang.Exception

start_state

public int start_state()

Indicates start state.

Specified by:

start_state in class lr_parser

start_production

public int start_production()

Indicates start production.

Specified by:

start_production in class lr_parser

EOF_sym

public int EOF_sym()

EOF Symbol index.

Specified by:

EOF_sym in class lr_parser

error_sym

public int error_sym()

error Symbol index.

Specified by:

error_sym in class lr_parser

syntax_error

public void syntax_error(Symbol cur_token)

Description copied from class: lr_parser

This method is called when a syntax error has been detected and recovery is about to be invoked. Here in the base class we just emit a "Syntax error" error message.

Overrides:

syntax_error in class lr_parser

Parameters:

cur_token - the current lookahead Symbol.

unrecovered_syntax_error

public void unrecovered_syntax_error(Symbol cur_token)

Description copied from class: lr_parser

This method is called if it is determined that syntax error recovery has been unsuccessful. Here in the base class we report a fatal error.

Overrides:

unrecovered_syntax_error in class lr_parser

Parameters:

cur_token - the current lookahead Symbol.