[PROTON-2665] [C++] Make the broker example more idiomatic by using C++11 lambdas

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: proton-c-0.38.0
• Fix Version/s: proton-c-0.39.0
• Component/s: cpp-binding
• Assignee: Andrew Stitcher
• Reporter: Andrew Stitcher
• Created: 04/Jan/23 22:53
• Updated: 07/Jun/23 12:18
• Resolved: 04/Jan/23 23:48