Re: [Boost-users] [boost] Create Graph in Function

On Wed, Oct 28, 2009 at 6:12 PM, James Thunes wrote:

Perhaps an easy answer, but I am working on adding a boost graph to an existing code. I would like to create the graph in a function (not main) and then read/modify it in a separate function. I am unsure as to what I need to pass between the functions to allow this to work.

In other words, I am able to correctly create the graph in a function and modify as necessary. This function will be called many times as the code runs and it is inefficient to recreate the graph every time. I want to create the graph once when the code is run and pass the created graph to the function.

Due to the structure of the code (mostly Fortran), I can not define the graph in the main function of the code.

My graph is defined as: adjacency_list Graph;

Thank you for any help you can give, James

Try shared_ptr. Something like.

function(){ typedef adjacency_list Graph; shared_ptr< Graph > gptr( new Graph(n) ); return gptr; }