java_cup
Class parser

java.lang.Object
  java_cup.runtime.lr_parser
      java_cup.parser

public class parser

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$parser$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

parser()
Default constructor.

parser(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.
void	report_error(java.lang.String message, java.lang.Object info) Report a non fatal error (or warning).
void	report_fatal_error(java.lang.String message, java.lang.Object info) Report a fatal error.
Symbol	scan() Scan to get the next Symbol.
int	start_production() Indicates start production.
int	start_state() Indicates start state.
void	user_init() User initialization code.

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, restart_lookahead, setScanner, shift_under_error, syntax_error, try_parse_ahead, unpackFromStrings, unrecovered_syntax_error

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$parser$actions action_obj

Instance of action encapsulation class.

Constructor Detail

parser

public parser()

Default constructor.

parser

public parser(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

user_init

public void user_init()
               throws java.lang.Exception

User initialization code.

Overrides:

user_init in class lr_parser

Throws:

java.lang.Exception

scan

public Symbol scan()
            throws java.lang.Exception

Scan to get the next Symbol.

Overrides:

scan in class lr_parser

Throws:

java.lang.Exception

report_fatal_error

public void report_fatal_error(java.lang.String message,
                               java.lang.Object info)

Description copied from class: lr_parser

Report a fatal error. This method takes a message string and an additional object (to be used by specializations implemented in subclasses). Here in the base class a very simple implementation is provided which reports the error then throws an exception.

Overrides:

report_fatal_error in class lr_parser

Parameters:

message - an error message.

info - an extra object reserved for use by specialized subclasses.

report_error

public void report_error(java.lang.String message,
                         java.lang.Object info)

Description copied from class: lr_parser

Report a non fatal error (or warning). This method takes a message string and an additional object (to be used by specializations implemented in subclasses). Here in the base class a very simple implementation is provided which simply prints the message to System.err.

Overrides:

report_error in class lr_parser

Parameters:

message - an error message.

info - an extra object reserved for use by specialized subclasses.