org.jacorb.idl.runtime
Class symbol
java.lang.Object
org.jacorb.idl.runtime.symbol
public class symbol
extends java.lang.Object
This class represents a (terminal or non-terminal) symbol that, among
other things can be placed on the parse stack. Symbols are used to
keep track of state on the parse stack. The symbol currently on top
of the stack contains the current state in the parse_state field.
In addition to the parse_state field, symbols also maintain a record
of the symbol number that they represent in the sym field. Finally,
symbols are used contain to any attributes used by semantic action (this
is done via fields added in subclasses -- see for example, int_token and
str_token).
Version:
- Scott Hudson
token
, int_token
, str_token
int | parse_state - The parse state to be recorded on the parse stack with this symbol.
|
int | sym - The symbol number of the terminal or non terminal being represented
|
symbol(int sym_num) - Constructor without a known state.
|
symbol(int sym_num, int state) - Full constructor.
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parse_state
public int parse_state
The parse state to be recorded on the parse stack with this symbol.
This field is for the convenience of the parser and shouldn't be
modified except by the parser.
sym
public int sym
The symbol number of the terminal or non terminal being represented
symbol
public symbol(int sym_num)
Constructor without a known state.
symbol
public symbol(int sym_num,
int state)
Full constructor.