Concat function or equivalent for CDS view?

Trying to create a CDS view and looking to combine multiple character fields (e.g. first_name + last_name) and am wondering if this is possible? Am on CRM NW 7.4 SP5 on HANA.

Using the arithmetic function gives me the following.

Data type CHAR is currently not supported in an arithmetic expression

Looking at the official documentation here, it doesn't appear to be included?

ABAP Keyword Documentation

I can always create a AMDP or even a HANA native view, just wondering if anyone has come across the same issue and found a solution within CDS view?

Thanks in advance,
Sean.