Open Radar

 
Summary:
When auto-completion has generated a capsule for a block parameter on a function or method call, double-clicking it expands it into an actual instantiation of a block. This feature is missing for C++11 Lambdas.

Steps to Reproduce:
• Type "[NSURLConnection sendAsync" in an ObjC source file, then press ESC and accept the suggested completion by pressing the tab key.
• Double-click the third blue parameter placeholder capsule (the block parameter that starts with ^). It expands into an actual block instantiation with a "code" placeholder between the curly brackets.
• Now create a C++ file and add the CTimer.h and CTimer.mm files from https://github.com/uliwitness/Stacksmith/commit/23fa867f9b871b3093e78b55b15cf4cbe30860fa#diff-70a5864bdbd4d2c3b01c8fc8daf4fc3d to the project.
• Include CTimer.h in your C++ file and write "CTimer timer; timer.SetHa" (without the quotes) in a function in there.
• Press ESC to auto-complete, and accept the completion to SetHandler.
• Double-click the blue parameter placeholder capsule to expand it (the one that starts with "std::function")

Expected Results:
• The capsule should expand into an instantiation of a C++11 Lambda, like []( CTimer* ) { <#code#> }

Actual Results:
• The capsule is simply removed and the lambda type turned into text, "std::function<void (CTimer *)> timerHandler".

Notes:
Make sure your C++ language dialect is set to C++11, earlier versions of C++ don't support Lambdas.