Fix C++ code generation for typed eigen matrices. #1688
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Summary: Eigen distinguishes between matrices of bools, naturals and doubles; when generating a C++ fragment to construct a BMG graph, we always generated a double matrix, but that's bad; it will not type check when compiled by the C++ compiler since the BMG methods for constructing constant matrices require an input of the appropriate type. Reviewed By: gafter, AishwaryaSivaraman Differential Revision: D39632858 fbshipit-source-id: aef37f30537fc690ed7756822a373f7411559669
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Summary: Eigen distinguishes between matrices of bools, naturals and doubles; when generating a C++ fragment to construct a BMG graph, we always generated a double matrix, but that's bad; it will not type check when compiled by the C++ compiler since the BMG methods for constructing constant matrices require an input of the appropriate type.
Reviewed By: gafter, AishwaryaSivaraman
Differential Revision: D39632858