How can I use the compile time constant __LINE__ in a string?

Question

I can use __LINE__ as a method parameter just fine, but I would like an easy way to use it in a function that uses strings.

For instance say I have this:

Answer 1

The usual options for formatting a number into a string apply: Boost lexical_cast, ostringstream, sprintf or snprintf, etc.

Here is one of my favorite links on the topic: http://www.gotw.ca/publications/mill19.htm