25 Sep
2008
25 Sep
'08
1:48 p.m.
Joel de Guzman wrote:
Doug Gregor wrote:
Also in the "Arguments" subsection, there's a parenthetical comment "and it's BLL counterparts: _1, _2, _3, _4, and so on). IIRC, the _# placeholders actually came from Boost.Bind; the Lambda library originally used arg1, arg2, and arg3.
Hah! I didn't know that. I've always used arg1, arg2 but I didn't steal that from lambda. Lambda became a later influence after FC++.
Lambda's original placeholders were free1, free2 and free3. _1, _2, _3 were added later as aliases. I think that it has never had _4 and above. Jaakko's Binder library - the precursor of Lambda - used free1 and free2. http://www.cs.utu.fi/BL/