public IfStatement(ArithmExprEvaluator e1, RelationEvalutator relOp, ArithmExprEvaluator e2, Queue <Statement> stat, Queue <Statement> elseStat)
{
expr1 = e1;
relationOp = relOp;
expr2 = e2;
statements = stat;
elseStatements = elseStat;
}
private Statement HandleIfStatement()
{
if (Accept(TokenType.If))
{
Expect(TokenType.ParenthesisLeft);
var expr1 = GetArithmExpr();
var relationToken = currentToken;
ExpectRelationOp();
var relationOp = new RelationEvalutator(relationToken.code);
var expr2 = GetArithmExpr();
Expect(TokenType.ParenthesisRight);
var blockStatements = GetStatementBlock();
var elseBlockStatements = new Queue <Statement>();
if (Accept(TokenType.Else))
{
elseBlockStatements = GetStatementBlock();
}
return(new IfStatement(expr1, relationOp, expr2, blockStatements, elseBlockStatements));
}
return(null);
}