tie

I need to work with some libraries that unfortunately log diagnostic messages to STDOUT and STDERR. By using tie , I can redirect those writes to a function that captures those. Since I don't want all STDOUT and STDERR output of my programs to be captured thtough the tied handle, I'd like to do this only for certain packages. I have come up with a solution where the actual behavior is determined by looking at caller() as can be seen below, but I have the feeling that there has to be a better way... Is there a more elegant solution? package My::Log::Capture; use strict; use warnings; use 5.010;

Is there a way to write a variant of std::tie in c++11/1y that ties deeply into a tuple. That is, one in which tie((x,y),z) = make_tuple(make_tuple(1,2),3) binds x, y, z to 1, 2 and 3 , respectively as in the following example. It would be nice. Thanks. #include <tuple> #include <iostream> using namespace std; int main() { int x, y ,z; auto t = make_tuple(1,2); std::tie(y,x)= t; //std::tie((x,y),z) = make_tuple(t,3); //not working cout << x << y << z << endl; return 0; } Maybe you're looking for std::tuple_cat : std::tie(x,y,z) = std::tuple_cat(t, make_tuple(3)); You can string together tuples

I want to see every place when variable in perl script is created/accessed/destroyed It is easily reachable using tie or Variable::Magic But how to apply this magic automatically when variable is created? You can take a look at B::Xref which generates a cross reference listing of all variables in your application. Basically, you need to walk the byte code to find all variable declarations/initializations. You can also alter the byte code, i.e. add code to tie the variables. However, I cannot point you to an example, because this is rarely done. As an alternative, you could use a code filter to