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/* | |
tests/test_builtin_casters.cpp -- Casters available without any additional headers | |
Copyright (c) 2017 Wenzel Jakob <[email protected]> | |
All rights reserved. Use of this source code is governed by a | |
BSD-style license that can be found in the LICENSE file. | |
*/ | |
TEST_SUBMODULE(builtin_casters, m) { | |
// test_simple_string | |
m.def("string_roundtrip", [](const char *s) { return s; }); | |
// test_unicode_conversion | |
// Some test characters in utf16 and utf32 encodings. The last one (the π) contains a null byte | |
char32_t a32 = 0x61 /*a*/, z32 = 0x7a /*z*/, ib32 = 0x203d /*β½*/, cake32 = 0x1f382 /*π*/, mathbfA32 = 0x1d400 /*π*/; | |
char16_t b16 = 0x62 /*b*/, z16 = 0x7a, ib16 = 0x203d, cake16_1 = 0xd83c, cake16_2 = 0xdf82, mathbfA16_1 = 0xd835, mathbfA16_2 = 0xdc00; | |
std::wstring wstr; | |
wstr.push_back(0x61); // a | |
wstr.push_back(0x2e18); // βΈ | |
if (sizeof(wchar_t) == 2) { wstr.push_back(mathbfA16_1); wstr.push_back(mathbfA16_2); } // π, utf16 | |
else { wstr.push_back((wchar_t) mathbfA32); } // π, utf32 | |
wstr.push_back(0x7a); // z | |
m.def("good_utf8_string", []() { return std::string((const char*)u8"Say utf8\u203d \U0001f382 \U0001d400"); }); // Say utf8β½ π π | |
m.def("good_utf16_string", [=]() { return std::u16string({ b16, ib16, cake16_1, cake16_2, mathbfA16_1, mathbfA16_2, z16 }); }); // bβ½ππz | |
m.def("good_utf32_string", [=]() { return std::u32string({ a32, mathbfA32, cake32, ib32, z32 }); }); // aππβ½z | |
m.def("good_wchar_string", [=]() { return wstr; }); // aβ½πz | |
m.def("bad_utf8_string", []() { return std::string("abc\xd0" "def"); }); | |
m.def("bad_utf16_string", [=]() { return std::u16string({ b16, char16_t(0xd800), z16 }); }); | |
// Under Python 2.7, invalid unicode UTF-32 characters don't appear to trigger UnicodeDecodeError | |
if (PY_MAJOR_VERSION >= 3) | |
m.def("bad_utf32_string", [=]() { return std::u32string({ a32, char32_t(0xd800), z32 }); }); | |
if (PY_MAJOR_VERSION >= 3 || sizeof(wchar_t) == 2) | |
m.def("bad_wchar_string", [=]() { return std::wstring({ wchar_t(0x61), wchar_t(0xd800) }); }); | |
m.def("u8_Z", []() -> char { return 'Z'; }); | |
m.def("u8_eacute", []() -> char { return '\xe9'; }); | |
m.def("u16_ibang", [=]() -> char16_t { return ib16; }); | |
m.def("u32_mathbfA", [=]() -> char32_t { return mathbfA32; }); | |
m.def("wchar_heart", []() -> wchar_t { return 0x2665; }); | |
// test_single_char_arguments | |
m.attr("wchar_size") = py::cast(sizeof(wchar_t)); | |
m.def("ord_char", [](char c) -> int { return static_cast<unsigned char>(c); }); | |
m.def("ord_char_lv", [](char &c) -> int { return static_cast<unsigned char>(c); }); | |
m.def("ord_char16", [](char16_t c) -> uint16_t { return c; }); | |
m.def("ord_char16_lv", [](char16_t &c) -> uint16_t { return c; }); | |
m.def("ord_char32", [](char32_t c) -> uint32_t { return c; }); | |
m.def("ord_wchar", [](wchar_t c) -> int { return c; }); | |
// test_bytes_to_string | |
m.def("strlen", [](char *s) { return strlen(s); }); | |
m.def("string_length", [](std::string s) { return s.length(); }); | |
m.attr("has_u8string") = true; | |
m.def("good_utf8_u8string", []() { return std::u8string(u8"Say utf8\u203d \U0001f382 \U0001d400"); }); // Say utf8β½ π π | |
m.def("bad_utf8_u8string", []() { return std::u8string((const char8_t*)"abc\xd0" "def"); }); | |
m.def("u8_char8_Z", []() -> char8_t { return u8'Z'; }); | |
// test_single_char_arguments | |
m.def("ord_char8", [](char8_t c) -> int { return static_cast<unsigned char>(c); }); | |
m.def("ord_char8_lv", [](char8_t &c) -> int { return static_cast<unsigned char>(c); }); | |
// test_string_view | |
m.attr("has_string_view") = true; | |
m.def("string_view_print", [](std::string_view s) { py::print(s, s.size()); }); | |
m.def("string_view16_print", [](std::u16string_view s) { py::print(s, s.size()); }); | |
m.def("string_view32_print", [](std::u32string_view s) { py::print(s, s.size()); }); | |
m.def("string_view_chars", [](std::string_view s) { py::list l; for (auto c : s) l.append((std::uint8_t) c); return l; }); | |
m.def("string_view16_chars", [](std::u16string_view s) { py::list l; for (auto c : s) l.append((int) c); return l; }); | |
m.def("string_view32_chars", [](std::u32string_view s) { py::list l; for (auto c : s) l.append((int) c); return l; }); | |
m.def("string_view_return", []() { return std::string_view((const char*)u8"utf8 secret \U0001f382"); }); | |
m.def("string_view16_return", []() { return std::u16string_view(u"utf16 secret \U0001f382"); }); | |
m.def("string_view32_return", []() { return std::u32string_view(U"utf32 secret \U0001f382"); }); | |
m.def("string_view8_print", [](std::u8string_view s) { py::print(s, s.size()); }); | |
m.def("string_view8_chars", [](std::u8string_view s) { py::list l; for (auto c : s) l.append((std::uint8_t) c); return l; }); | |
m.def("string_view8_return", []() { return std::u8string_view(u8"utf8 secret \U0001f382"); }); | |
// test_integer_casting | |
m.def("i32_str", [](std::int32_t v) { return std::to_string(v); }); | |
m.def("u32_str", [](std::uint32_t v) { return std::to_string(v); }); | |
m.def("i64_str", [](std::int64_t v) { return std::to_string(v); }); | |
m.def("u64_str", [](std::uint64_t v) { return std::to_string(v); }); | |
// test_tuple | |
m.def("pair_passthrough", [](std::pair<bool, std::string> input) { | |
return std::make_pair(input.second, input.first); | |
}, "Return a pair in reversed order"); | |
m.def("tuple_passthrough", [](std::tuple<bool, std::string, int> input) { | |
return std::make_tuple(std::get<2>(input), std::get<1>(input), std::get<0>(input)); | |
}, "Return a triple in reversed order"); | |
m.def("empty_tuple", []() { return std::tuple<>(); }); | |
static std::pair<RValueCaster, RValueCaster> lvpair; | |
static std::tuple<RValueCaster, RValueCaster, RValueCaster> lvtuple; | |
static std::pair<RValueCaster, std::tuple<RValueCaster, std::pair<RValueCaster, RValueCaster>>> lvnested; | |
m.def("rvalue_pair", []() { return std::make_pair(RValueCaster{}, RValueCaster{}); }); | |
m.def("lvalue_pair", []() -> const decltype(lvpair) & { return lvpair; }); | |
m.def("rvalue_tuple", []() { return std::make_tuple(RValueCaster{}, RValueCaster{}, RValueCaster{}); }); | |
m.def("lvalue_tuple", []() -> const decltype(lvtuple) & { return lvtuple; }); | |
m.def("rvalue_nested", []() { | |
return std::make_pair(RValueCaster{}, std::make_tuple(RValueCaster{}, std::make_pair(RValueCaster{}, RValueCaster{}))); }); | |
m.def("lvalue_nested", []() -> const decltype(lvnested) & { return lvnested; }); | |
static std::pair<int, std::string> int_string_pair{2, "items"}; | |
m.def("int_string_pair", []() { return &int_string_pair; }); | |
// test_builtins_cast_return_none | |
m.def("return_none_string", []() -> std::string * { return nullptr; }); | |
m.def("return_none_char", []() -> const char * { return nullptr; }); | |
m.def("return_none_bool", []() -> bool * { return nullptr; }); | |
m.def("return_none_int", []() -> int * { return nullptr; }); | |
m.def("return_none_float", []() -> float * { return nullptr; }); | |
m.def("return_none_pair", []() -> std::pair<int,int> * { return nullptr; }); | |
// test_none_deferred | |
m.def("defer_none_cstring", [](char *) { return false; }); | |
m.def("defer_none_cstring", [](py::none) { return true; }); | |
m.def("defer_none_custom", [](UserType *) { return false; }); | |
m.def("defer_none_custom", [](py::none) { return true; }); | |
m.def("nodefer_none_void", [](void *) { return true; }); | |
m.def("nodefer_none_void", [](py::none) { return false; }); | |
// test_void_caster | |
m.def("load_nullptr_t", [](std::nullptr_t) {}); // not useful, but it should still compile | |
m.def("cast_nullptr_t", []() { return std::nullptr_t{}; }); | |
// test_bool_caster | |
m.def("bool_passthrough", [](bool arg) { return arg; }); | |
m.def("bool_passthrough_noconvert", [](bool arg) { return arg; }, py::arg().noconvert()); | |
// test_reference_wrapper | |
m.def("refwrap_builtin", [](std::reference_wrapper<int> p) { return 10 * p.get(); }); | |
m.def("refwrap_usertype", [](std::reference_wrapper<UserType> p) { return p.get().value(); }); | |
// Not currently supported (std::pair caster has return-by-value cast operator); | |
// triggers static_assert failure. | |
//m.def("refwrap_pair", [](std::reference_wrapper<std::pair<int, int>>) { }); | |
m.def("refwrap_list", [](bool copy) { | |
static IncType x1(1), x2(2); | |
py::list l; | |
for (auto &f : {std::ref(x1), std::ref(x2)}) { | |
l.append(py::cast(f, copy ? py::return_value_policy::copy | |
: py::return_value_policy::reference)); | |
} | |
return l; | |
}, "copy"_a); | |
m.def("refwrap_iiw", [](const IncType &w) { return w.value(); }); | |
m.def("refwrap_call_iiw", [](IncType &w, py::function f) { | |
py::list l; | |
l.append(f(std::ref(w))); | |
l.append(f(std::cref(w))); | |
IncType x(w.value()); | |
l.append(f(std::ref(x))); | |
IncType y(w.value()); | |
auto r3 = std::ref(y); | |
l.append(f(r3)); | |
return l; | |
}); | |
// 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;}); | |
/// test void* cast operator | |
m.def("test_void_caster", []() -> bool { | |
void *v = (void *) 0xabcd; | |
py::object o = py::cast(v); | |
return py::cast<void *>(o) == v; | |
}); | |
} | |