When should be used boost/lamda/bind.hpp? Is there somewhere a documentation which compares the 2 implementations? Best regards Hansjörg Steven Watanabe schrieb:
AMDG
Robert Jones wrote:
First - is "boost/lambda/bind.hpp" equivalent to "boost/bind.hpp"? Should it ever be necessary to include both?
Bind and Lambda are separate. If you are using Lambda you need to use boost/lambda/bind.hpp which contains boost::lambda::bind.
Second - Is it true that a lambda function is syntactically and semantically the same as a bind finction, eg
Given:- int foo( int i ) { return i + 3; }
Are these two expressions the same? bind( &foo, _1 ); _1 + 3;
They should behave the same, unless this is a boost::bind and you want to do further composition.
Finally (for now!) - why is this wrong?
struct A { string identity( string ) const; } a;
vector<string> v; for_each( v.begin(), v.end(), cout << bind( &A::identity, a, _1 ) << '\n' );
which is intended to output the return value of A::identity() for each element of v, separated by newlines.
It will only work if you using boost::lambda::bind, not boost::bind.
In Christ, Steven Watanabe
_______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost