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Convenience constructor templates for buffer_info (#860)

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* Added template constructors to buffer_info that can deduce the item size, format string, and number of dimensions from the pointer type and the shape container

* Implemented actual buffer_info constructor as private delegate constructor taking rvalue reference as a workaround for the evaluation order move problem on GCC 4.8
This commit is contained in:
Yannick Jadoul
2017-05-29 03:13:55 +02:00
committed by Dean Moldovan
parent 427e4afc69
commit b700c5d672
2 changed files with 14 additions and 3 deletions
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3
tests/test_buffers.cpp
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@@ -136,9 +136,6 @@ test_initializer buffers([](py::module &m) {
.def_buffer([](Matrix &m) -> py::buffer_info {
return py::buffer_info(
m.data(), /* Pointer to buffer */
sizeof(float), /* Size of one scalar */
py::format_descriptor<float>::format(), /* Python struct-style format descriptor */
2, /* Number of dimensions */
{ m.rows(), m.cols() }, /* Buffer dimensions */
{ sizeof(float) * size_t(m.rows()), /* Strides (in bytes) for each index */
sizeof(float) }