Class EJayParser

java.lang.Object
  java_cup.runtime.lr_parser
      EJayParser

public class EJayParser

extends java_cup.runtime.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$EJayParser$actions	action_obj Instance of action encapsulation class.
int	BLOCK_SYMTAB_SIZE Reasonable size for a block symbol table.
int	blockNum Incrementing counter for nested blocks.
FunctionEntry	entry Reference to the current function entry.
int	FUNC_SYMTAB_SIZE Reasonable size for a function symbol table.
int	structNum Incrementing counter for declared structs.
SymbolTable	symtab Reference to current symbol table.

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

EJayParser()
Default constructor.

EJayParser(java_cup.runtime.Scanner s)
Constructor which sets the default scanner.

Method Summary

short[][]	action_table() Access to parse-action table.
java_cup.runtime.Symbol	do_action(int act_num, java_cup.runtime.lr_parser parser, java.util.Stack stack, int top) Invoke a user supplied parse action.
void	enterBlock(java.lang.String blockType) Enter an inner block by allocating a symtab for it, entering a unique-named BlockEntry for it in the current symtab, and descending into the new block symtab.
void	enterVars(TypeNode type, TreeNodeList vars) Enter the vars in the given tree node list in the current symtab.
int	EOF_sym() EOF Symbol index.
int	error_sym() error Symbol index.
SymbolTable	getSymbolTable()
protected void	init_actions() Action encapsulation object initializer.
void	initSymbolTable(int size)
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(java_cup.runtime.Symbol cur_token)

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, unrecovered_syntax_error, 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$EJayParser$actions action_obj

Instance of action encapsulation class.

symtab

public SymbolTable symtab

Reference to current symbol table. This value changes as the program is parsed, such that symtab points to the symbol table for the scope in which the parse is currently active.

entry

public FunctionEntry entry

Reference to the current function entry. It is assigned each time a function entry is created.

FUNC_SYMTAB_SIZE

public final int FUNC_SYMTAB_SIZE

Reasonable size for a function symbol table.

See Also:

Constant Field Values

BLOCK_SYMTAB_SIZE

public final int BLOCK_SYMTAB_SIZE

Reasonable size for a block symbol table.

See Also:

Constant Field Values

structNum

public int structNum

Incrementing counter for declared structs. This number is used to create a unique name for each struct, so it can be entered and subsequently retrieved from a symbol table.

blockNum

public int blockNum

Incrementing counter for nested blocks. This number is used to create a unique name for each block, so it can be entered and subsequently retrieved from a symbol table.

Constructor Detail

EJayParser

public EJayParser()

Default constructor.

EJayParser

public EJayParser(java_cup.runtime.Scanner s)

Constructor which sets the default scanner.

Method Detail

production_table

public short[][] production_table()

Access to production table.

action_table

public short[][] action_table()

Access to parse-action table.

reduce_table

public short[][] reduce_table()

Access to reduce_goto table.

init_actions

protected void init_actions()

Action encapsulation object initializer.

do_action

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

Invoke a user supplied parse action.

Throws:

java.lang.Exception

start_state

public int start_state()

Indicates start state.

start_production

public int start_production()

Indicates start production.

EOF_sym

public int EOF_sym()

EOF Symbol index.

error_sym

public int error_sym()

error Symbol index.

syntax_error

public void syntax_error(java_cup.runtime.Symbol cur_token)

initSymbolTable

public void initSymbolTable(int size)

getSymbolTable

public SymbolTable getSymbolTable()

enterVars

public void enterVars(TypeNode type,
                      TreeNodeList vars)

Enter the vars in the given tree node list in the current symtab. The type of each var entry is the given type.

enterBlock

public void enterBlock(java.lang.String blockType)

Enter an inner block by allocating a symtab for it, entering a unique-named BlockEntry for it in the current symtab, and descending into the new block symtab. This function is used both for inner statement blocks and struct types; the String-valued blockType parameter is "block" or "struct" depending on the caller. NOTE: An acceptable solution to CSC 330 Assignment 3 does not need to generate the unique entry name.