Added guidance to make function objects cheap to copy and pass by value

10 years ago · d81adf4a8e
parent ec3efd326f
commit d81adf4a8e
1 changed files with 1 additions and 0 deletions
--- a/CppCoreGuidelines.md
+++ b/CppCoreGuidelines.md
@ -5195,6 +5195,7 @@ Summary of container rules:

 A function object is an object supplying an overloaded `()` so that you can call it.
 A lambda expression (colloquially often shortened to "a lambda") is a notation for generating a function object.
+Function objects should be cheap to copy (and therefore [passed by value](#Rf-in)).

 Summary: