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Made arithmetic and complex casters respect convert

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Arithmetic and complex casters now only do a converting cast when
`convert=true`; previously they would convert always (e.g. when passing
an int to a float-accepting function, or a float to complex-accepting
function).
This commit is contained in:
Jason Rhinelander 2017-02-03 20:16:14 -05:00
parent 0558a9a739
commit 709675a7aa
2 changed files with 15 additions and 9 deletions
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20
include/pybind11/cast.h
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@ -473,18 +473,22 @@ public:
template <typename T>
struct type_caster<T, enable_if_t<std::is_arithmetic<T>::value>> {
typedef typename std::conditional<sizeof(T) <= sizeof(long), long, long long>::type _py_type_0;
typedef typename std::conditional<std::is_signed<T>::value, _py_type_0, typename std::make_unsigned<_py_type_0>::type>::type _py_type_1;
typedef typename std::conditional<std::is_floating_point<T>::value, double, _py_type_1>::type py_type;
using _py_type_0 = conditional_t<sizeof(T) <= sizeof(long), long, long long>;
using _py_type_1 = conditional_t<std::is_signed<T>::value, _py_type_0, typename std::make_unsigned<_py_type_0>::type>;
using py_type = conditional_t<std::is_floating_point<T>::value, double, _py_type_1>;
public:
bool load(handle src, bool) {
bool load(handle src, bool convert) {
py_type py_value;
if (!src) {
if (!src)
return false;
} if (std::is_floating_point<T>::value) {
py_value = (py_type) PyFloat_AsDouble(src.ptr());
if (std::is_floating_point<T>::value) {
if (convert || PyFloat_Check(src.ptr()))
py_value = (py_type) PyFloat_AsDouble(src.ptr());
else
return false;
} else if (sizeof(T) <= sizeof(long)) {
if (PyFloat_Check(src.ptr()))
return false;
@ -511,7 +515,7 @@ public:
bool type_error = PyErr_ExceptionMatches(PyExc_TypeError);
#endif
PyErr_Clear();
if (type_error && PyNumber_Check(src.ptr())) {
if (type_error && convert && PyNumber_Check(src.ptr())) {
auto tmp = reinterpret_borrow<object>(std::is_floating_point<T>::value
? PyNumber_Float(src.ptr())
: PyNumber_Long(src.ptr()));

4
include/pybind11/complex.h
View File

@ -28,9 +28,11 @@ template <typename T> struct is_fmt_numeric<std::complex<T>> {
template <typename T> class type_caster<std::complex<T>> {
public:
bool load(handle src, bool) {
bool load(handle src, bool convert) {
if (!src)
return false;
if (!convert && !PyComplex_Check(src.ptr()))
return false;
Py_complex result = PyComplex_AsCComplex(src.ptr());
if (result.real == -1.0 && PyErr_Occurred()) {
PyErr_Clear();