The GraphBLAS standard defines a set of generalized matrix and vector operations based on semiring algebraic structures. These operations can be used to expressed a variety of graph algorithms. This document defines the C++ programming interface for the GraphBLAS standard. We refer to this as the \emph{GraphBLAS C++ API (Application Programming Interface)}. The GraphBLAS C++ API defines a collection of data structures, algorithms, views, arithmetic operators, and concepts for implementing graph algorithms.
A GraphBLAS library should define the macro GRAPHBLAS_CPP_VERSION to indicate its
level of conformance with the GraphBLAS C++ API. To indicate conformance with the
GraphBLAS 0.1a draft specification, a library should provide the macro GRAPHBLAS_CPP_VERSION
with a value greater than or equal to 202207L.
// Define the `GRAPHBLAS_CPP_VERSION` macro to indicate
// conformance to the GraphBLAS 0.1 Draft Specification.
#define GRAPHBLAS_CPP_VERSION 202207L