Package java_cup.runtime
Class symbol
java.lang.Object
java_cup.runtime.symbol
- Direct Known Subclasses:
token
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).
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionint
The parse state to be recorded on the parse stack with this symbol.int
The symbol number of the terminal or non terminal being represented -
Constructor Summary
Constructors -
Method Summary
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Field Details
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sym
public int symThe symbol number of the terminal or non terminal being represented -
parse_state
public int parse_stateThe 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.
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Constructor Details
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symbol
public symbol(int sym_num, int state) Full constructor. -
symbol
public symbol(int sym_num) Constructor without a known state.
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