Usage of shared pointer std::make_shared in C++

This line of code is written in the C++ programming language. In order to understand this line of code, we need to understand each component in detail.

1. precomputation_grid_stack_: This is a PrecomputationGridStack2Dshared pointer to type.

2. std::make_shared<PrecomputationGridStack2D>: This is a C++ library function that creates a new PrecomputationGridStack2Dobject and returns a shared pointer to it. The use of this function is more efficient than directly using newkeywords to create objects and assign to them std::shared_ptr, because it reduces the number of memory allocations and improves the efficiency of memory management.

3. global_relocation_map, options_: These are PrecomputationGridStack2Dthe parameters passed to the constructor. global_relocation_mapIt might be some kind of map or data structure, options_it might be a set of configurations or options.

Specifically, the meaning of this code segment may be: "Create a new PrecomputationGridStack2Dobject, and this object requires global_relocation_mapand options_as input parameters. Then, assign the shared pointer of this object to precomputation_grid_stack_".

To understand exactly this line of code, you need to understand PrecomputationGridStack2Dclasses and their structure