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Add const to buffer:request() (#1890)
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@ -1312,7 +1312,7 @@ class buffer : public object {
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public:
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PYBIND11_OBJECT_DEFAULT(buffer, object, PyObject_CheckBuffer)
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buffer_info request(bool writable = false) {
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buffer_info request(bool writable = false) const {
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int flags = PyBUF_STRIDES | PyBUF_FORMAT;
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if (writable) flags |= PyBUF_WRITABLE;
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Py_buffer *view = new Py_buffer();
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@ -78,7 +78,7 @@ TEST_SUBMODULE(buffers, m) {
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py::class_<Matrix>(m, "Matrix", py::buffer_protocol())
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.def(py::init<ssize_t, ssize_t>())
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/// Construct from a buffer
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.def(py::init([](py::buffer b) {
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.def(py::init([](py::buffer const b) {
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py::buffer_info info = b.request();
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if (info.format != py::format_descriptor<float>::format() || info.ndim != 2)
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throw std::runtime_error("Incompatible buffer format!");
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