?? booleanexp.java
字號:
/**
* The interface of our BooleanExp Interpreter
* BooleanExp definition is:
* BooleanExp ::= VariableExp | Constant | OrExp | AndExp
* | NotExp | '(' BooleanExp ')'
* AndExp ::= BooleanExp 'and' BooleanExp
* OrExp ::= BooleanExp 'or' BooleanExp
* NotExp ::= BooleanExp 'not' BooleanExp
* Constant ::= 'true' | 'false'
* VariableExp ::= 'A' | 'B' | ... | 'Z'
*/
public interface BooleanExp {
public abstract boolean Evaluate(Context c);
public abstract BooleanExp Replace(String var, BooleanExp exp);
public abstract BooleanExp Copy();
}
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