If front() returns a reference and the container is empty what do I get, an undefined reference? Does it mean I need to check empty() before each front()?
If front() returns a reference and the container is empty what do I get,
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
If front() returns a reference and the container is empty what do I get, an undefined reference? Does it mean I need to check empty() before each front()?
You get undefined behaviour – you need to check that the container contains something using empty() (which checks if the container is empty) before calling front().