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Matching Python 2 int behavior on Python 2 (#1186)

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Pybind11's default conversion to int always produces a long on Python 2 (`int`s and `long`s were unified in Python 3). This patch fixes `int` handling to match Python 2 on Python 2; for short types (`size_t` or smaller), the number will be returned as an `int` if possible, otherwise `long`. Requires Python 2.5+.

This is needed for things like `sys.exit`, which refuse to accept a `long`.
This commit is contained in:
Henry Schreiner
2017-11-30 11:33:24 -06:00
committed by Jason Rhinelander
parent 3b265787f2
commit cf0d0f9d5a
4 changed files with 26 additions and 3 deletions
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5
tests/test_builtin_casters.cpp
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@@ -155,4 +155,9 @@ TEST_SUBMODULE(builtin_casters, m) {
// test_complex
m.def("complex_cast", [](float x) { return "{}"_s.format(x); });
m.def("complex_cast", [](std::complex<float> x) { return "({}, {})"_s.format(x.real(), x.imag()); });
// test int vs. long (Python 2)
m.def("int_cast", []() {return (int) 42;});
m.def("long_cast", []() {return (long) 42;});
m.def("longlong_cast", []() {return ULLONG_MAX;});
}