private Expression addition()
{
Expression e = multiplication();
while (true)
{
if (isEquals(TokenType.ADD))
{
e = new BinaryOP('+', e, multiplication());
continue;
}
if (isEquals(TokenType.SUB))
{
e = new BinaryOP('-', e, multiplication());
continue;
}
break;
}
return(e);
}
private Expression multiplication()
{
Expression e = unaryOP();
while (true)
{
if (isEquals(TokenType.MUL))
{
e = new BinaryOP('*', e, unaryOP());
continue;
}
if (isEquals(TokenType.DIV))
{
e = new BinaryOP('/', e, unaryOP());
continue;
}
break;
}
return(e);
}
public void visit(BinaryOP statement)
{
statement.a.accept(this);
statement.b.accept(this);
}