C++ Crash Course by Josh Lospinoso

Author:Josh Lospinoso
Language: eng
Format: epub
Publisher: No Starch Press
Published: 2019-02-09T16:00:00+00:00

Deleters

Deleters work the same way for shared pointers as they do for unique pointers except you don’t need to provide a template parameter with the deleter’s type. Simply pass the deleter as the second constructor argument. For example, to convert Listing 11-12 to use a shared pointer, you simply drop in the following type alias:

using FileGuard = std::shared_ptr<FILE>;

Now, you’re managing FILE* file handles with shared ownership.

A Partial List of Supported Operations

Table 11-4 provides a mostly complete listing of the supported constructors of shared_ptr. In this table, ptr is a raw pointer, sh_ptr is a shared pointer, u_ptr is a unique pointer, del is a deleter, and alc is an allocator.

Table 11-4: All of the Supported std::shared_ptr Constructors

Operation

Notes

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