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cmu-sei / gbtl

GraphBLAS Template Library (GBTL): C++ graph algorithms and primitives using semiring algebra as defined at graphblas.org
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supporting a pseudo-zero construct on cusp #22

Closed paldar closed 8 years ago

paldar commented 8 years ago

cuspbackend::matrix constructor is slightly different from that of sequential::matrix (and frontend::matrix, for that matter) in terms of how zeroes are treated. need to fix this.

however, if the only time a structural zero is used is at negation, and negate needs to take a semiring to get its ones and zeroes, there is really no point in storing a separate zero at the matrix level, eh?

paldar commented 8 years ago

storing structural zero at construction. used as reference only.