Why does a default argument for a lambda argument trigger a -pedantic" GCC warning?

Question

I had this lambda somewhere in my code:

[](bool a, bool=true){ return !a;} }

and GCC 4.6 \"complained\" with this warning:

warn         


        

Answer 1

Since C++14 it is allowed. It was found to be a defect long time ago: Default arguments for lambdas, and also Default arguments in lambda-expressions.