jay.yydebug
Interface yyDebug

All Known Implementing Classes:

yyAnim, yyAnimPanel, yyDebugAdapter

public interface yyDebug

debugging interface for parsers generated by jay. For details consult the skeleton files. The interface expects that the scanner can be queried more then once for a value corresponding to a token.

Method Summary

void	accept(Object value) parse is successful.
void	discard(int state, int token, String name, Object value) discarding token during error recovery.
void	error(String message) syntax error.
void	lex(int state, int token, String name, Object value) just called the scanner.
void	pop(int state) discarding a state during error recovery.
void	push(int state, Object value) just pushed the state/value stack.
void	reduce(int from, int to, int rule, String text, int len) rule completed, calling action.
void	reject() error recovery failed, about to throw yyException.
void	shift(int from, int to) moving to a new state following an action.
void	shift(int from, int to, int errorFlag) moving to a new state because of input or error.

Method Detail

push

void push(int state,
          Object value)

just pushed the state/value stack.

Parameters:

state - current state.

value - current value.

lex

void lex(int state,
         int token,
         String name,
         Object value)

just called the scanner.

Parameters:

state - current state.

token - just obtained from scanner.

name - of token in grammar.

value - will be obtained from scanner.

shift

void shift(int from,
           int to,
           int errorFlag)

moving to a new state because of input or error.

Parameters:

from - current state.

to - next state.

errorFlag - value in next state.

pop

void pop(int state)

discarding a state during error recovery.

Parameters:

state - discarded.

reject

void reject()

error recovery failed, about to throw yyException.

discard

void discard(int state,
             int token,
             String name,
             Object value)

discarding token during error recovery.

Parameters:

state - current state.

token - discarded.

name - of token in grammar.

value - will be obtained from scanner.

reduce

void reduce(int from,
            int to,
            int rule,
            String text,
            int len)

rule completed, calling action.

Parameters:

from - current state.

to - state to be uncovered.

rule - number of completed right-hand side.

text - text of rule.

len - number of symbols in rule.

shift

void shift(int from,
           int to)

moving to a new state following an action.

Parameters:

from - current state.

to - next state.

accept

void accept(Object value)

parse is successful.

Parameters:

value - to be returned by yyparse().

error

void error(String message)

syntax error.