4. vbl: Basic Templates

Chapter summary: The STL isn't perfect. vbl provides some of the missing classes.

All C++ programs need a few basic utilities, and all C++ programmers write their own at some point. The things included in vbl are not considered any better or worse than the several other libraries available, but they are consistently named and lightweight. The key elements of this library are:

class template: vbl_smart_ptr

Reference counted smart pointers for any class that defines ref and unref.

class: vbl_triple

Three element version of vcl_pair.

class: vbl_array_2d

A simple two dimensional array

class: vbl_sparse_array_2d

A simple two dimensional sparse array

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