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switched cpp_function to use variadic arguments

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Wenzel Jakob 2015-07-29 17:43:52 +02:00
parent fbe82bf94d
commit 71867830f5
2 changed files with 218 additions and 182 deletions
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20
include/pybind/operators.h
View File

@ -45,17 +45,17 @@ template <op_id, op_type, typename B, typename L, typename R> struct op_impl { }
/// Operator implementation generator /// Operator implementation generator
template <op_id id, op_type ot, typename L, typename R> struct op_ { template <op_id id, op_type ot, typename L, typename R> struct op_ {
template <typename base, typename holder> void execute(pybind::class_<base, holder> &class_, const char *doc, return_value_policy policy) const { template <typename Base, typename Holder, typename... Extra> void execute(pybind::class_<Base, Holder> &class_, Extra&&... extra) const {
typedef typename std::conditional<std::is_same<L, self_t>::value, base, L>::type L_type; typedef typename std::conditional<std::is_same<L, self_t>::value, Base, L>::type L_type;
typedef typename std::conditional<std::is_same<R, self_t>::value, base, R>::type R_type; typedef typename std::conditional<std::is_same<R, self_t>::value, Base, R>::type R_type;
typedef op_impl<id, ot, base, L_type, R_type> op; typedef op_impl<id, ot, Base, L_type, R_type> op;
class_.def(op::name(), &op::execute, doc, policy); class_.def(op::name(), &op::execute, std::forward<Extra>(extra)...);
} }
template <typename base, typename holder> void execute_cast(pybind::class_<base, holder> &class_, const char *doc, return_value_policy policy) const { template <typename Base, typename Holder, typename... Extra> void execute_cast(pybind::class_<Base, Holder> &class_, Extra&&... extra) const {
typedef typename std::conditional<std::is_same<L, self_t>::value, base, L>::type L_type; typedef typename std::conditional<std::is_same<L, self_t>::value, Base, L>::type L_type;
typedef typename std::conditional<std::is_same<R, self_t>::value, base, R>::type R_type; typedef typename std::conditional<std::is_same<R, self_t>::value, Base, R>::type R_type;
typedef op_impl<id, ot, base, L_type, R_type> op; typedef op_impl<id, ot, Base, L_type, R_type> op;
class_.def(op::name(), &op::execute_cast, doc, policy); class_.def(op::name(), &op::execute_cast, std::forward<Extra>(extra)...);
} }
}; };

376
include/pybind/pybind.h
View File

@ -22,16 +22,48 @@
NAMESPACE_BEGIN(pybind) NAMESPACE_BEGIN(pybind)
template <typename T> struct arg_t;
/// Annotation for keyword arguments
struct arg {
arg(const char *name) : name(name) { }
template <typename T> inline arg_t<T> operator=(const T &value);
const char *name;
};
/// Annotation for keyword arguments with default values
template <typename T> struct arg_t : public arg {
arg_t(const char *name, const T &value) : arg(name), value(value) { }
T value;
};
template <typename T> inline arg_t<T> arg::operator=(const T &value) { return arg_t<T>(name, value); }
/// Annotation for methods
struct is_method { };
/// Annotation for documentation
struct doc { const char *value; doc(const char *value) : value(value) { } };
/// Annotation for function names
struct name { const char *value; name(const char *value) : value(value) { } };
/// Annotation for function siblings
struct sibling { PyObject *value; sibling(handle value) : value(value.ptr()) { } };
/// Wraps an arbitrary C++ function/method/lambda function/.. into a callable Python object /// Wraps an arbitrary C++ function/method/lambda function/.. into a callable Python object
class cpp_function : public function { class cpp_function : public function {
private: private:
/// Chained list of function entries for overloading /// Chained list of function entries for overloading
struct function_entry { struct function_entry {
PyObject * (*impl) (function_entry *, PyObject *, PyObject *); const char *name = nullptr;
PyObject * (*impl) (function_entry *, PyObject *, PyObject *, PyObject *);
void *data; void *data;
std::string signature, doc; bool is_constructor = false, is_method = false;
bool is_constructor; short keywords = 0;
return_value_policy policy; return_value_policy policy = return_value_policy::automatic;
std::string signature;
PyObject *sibling = nullptr;
const char *doc = nullptr;
function_entry *next = nullptr; function_entry *next = nullptr;
}; };
@ -43,91 +75,119 @@ private:
/// Picks a suitable argument value converter from cast.h /// Picks a suitable argument value converter from cast.h
template <typename... T> using arg_value_caster = template <typename... T> using arg_value_caster =
detail::type_caster<typename std::tuple<T...>>; detail::type_caster<typename std::tuple<T...>>;
template <typename... T> void process_args(const std::tuple<T...> &args, function_entry *entry) {
process_args(args, entry, typename detail::make_index_sequence<sizeof...(T)>::type());
}
template <typename... T, size_t ... Index> void process_args(const
std::tuple<T...> &args, function_entry *entry,
detail::index_sequence<Index...>) {
int unused[] = { 0, (process_arg(std::get<Index>(args), entry), 0)... };
(void) unused;
}
void process_arg(const char *doc, function_entry *entry) { entry->doc = doc; }
void process_arg(const pybind::doc &d, function_entry *entry) { entry->doc = d.value; }
void process_arg(const pybind::name &n, function_entry *entry) { entry->name = n.value; }
void process_arg(const pybind::arg &, function_entry *entry) { entry->keywords++; }
void process_arg(const pybind::is_method &, function_entry *entry) { entry->is_method = true; }
void process_arg(const pybind::return_value_policy p, function_entry *entry) { entry->policy = p; }
void process_arg(pybind::sibling s, function_entry *entry) { entry->sibling = s.value; }
public: public:
cpp_function() { } cpp_function() { }
/// Vanilla function pointers /// Vanilla function pointers
template <typename return_type, typename... arg_type> template <typename Return, typename... Arg, typename... Extra>
cpp_function(return_type (*f)(arg_type...), const char *name = nullptr, cpp_function(Return (*f)(Arg...), Extra&&... extra) {
const char *doc = nullptr, return_value_policy policy = return_value_policy::automatic, struct capture {
const function &sibling = function(), bool is_method = false) { Return (*f)(Arg...);
std::tuple<Extra...> extra;
typedef arg_value_caster<arg_type...> cast_in;
typedef return_value_caster<return_type> cast_out;
auto impl = [](function_entry *entry, PyObject *pyArgs, PyObject *parent) -> PyObject * {
cast_in args;
if (!args.load(pyArgs, true)) return nullptr;
auto f = (return_type (*) (arg_type...)) entry->data;
return cast_out::cast(args.template call<return_type>(f),
entry->policy, parent);
}; };
initialize(name, doc, cast_in::name() + std::string(" -> ") + cast_out::name(), function_entry *entry = new function_entry();
sibling, is_method, policy, impl, (void *) f); entry->data = new capture { f, std::tuple<Extra...>(std::forward<Extra>(extra)...) };
typedef arg_value_caster<Arg...> cast_in;
typedef return_value_caster<Return> cast_out;
entry->impl = [](function_entry *entry, PyObject *pyArgs, PyObject *kwargs, PyObject *parent) -> PyObject * {
cast_in args;
if (!args.load(pyArgs, true)) return nullptr;
auto f = ((capture *) entry->data)->f;
(void)kwargs;
return cast_out::cast(args.template call<Return>(f), entry->policy, parent);
};
entry->signature = cast_in::name();
entry->signature += " -> ";
entry->signature += cast_out::name();
process_args(((capture *) entry->data)->extra, entry);
initialize(entry);
} }
/// Delegating helper constructor to deal with lambda functions /// Delegating helper constructor to deal with lambda functions
template <typename func> template <typename Func, typename... Extra> cpp_function(Func &&f, Extra&&... extra) {
cpp_function(func &&f, const char *name = nullptr, initialize(std::forward<Func>(f),
const char *doc = nullptr,
return_value_policy policy = return_value_policy::automatic,
const function &sibling = function(), bool is_method = false) {
initialize(std::forward<func>(f), name, doc, policy, sibling, is_method,
(typename detail::remove_class<decltype( (typename detail::remove_class<decltype(
&std::remove_reference<func>::type::operator())>::type *) nullptr); &std::remove_reference<Func>::type::operator())>::type *) nullptr,
std::forward<Extra>(extra)...);
} }
/// Class methods (non-const) /// Class methods (non-const)
template <typename return_type, typename class_type, typename ... arg_type> cpp_function( template <typename Return, typename Class, typename... Arg, typename... Extra> cpp_function(
return_type (class_type::*f)(arg_type...), const char *name = nullptr, Return (Class::*f)(Arg...), Extra&&... extra) {
const char *doc = nullptr, return_value_policy policy = return_value_policy::automatic, initialize([f](Class *c, Arg... args) -> Return { return (c->*f)(args...); },
const function &sibling = function(), bool is_method = false) { (Return (*) (Class *, Arg...)) nullptr, std::forward<Extra>(extra)...);
initialize([f](class_type *c, arg_type... args) -> return_type { return (c->*f)(args...); },
name, doc, policy, sibling, is_method, (return_type (*)(class_type *, arg_type ...)) nullptr);
} }
/// Class methods (const) /// Class methods (const)
template <typename return_type, typename class_type, typename ... arg_type> cpp_function( template <typename Return, typename Class, typename... Arg, typename... Extra> cpp_function(
return_type (class_type::*f)(arg_type...) const, const char *name = nullptr, Return (Class::*f)(Arg...) const, Extra&&... extra) {
const char *doc = nullptr, return_value_policy policy = return_value_policy::automatic, initialize([f](const Class *c, Arg... args) -> Return { return (c->*f)(args...); },
const function &sibling = function(), bool is_method = false) { (Return (*)(const Class *, Arg ...)) nullptr, std::forward<Extra>(extra)...);
initialize([f](const class_type *c, arg_type... args) -> return_type { return (c->*f)(args...); },
name, doc, policy, sibling, is_method, (return_type (*)(const class_type *, arg_type ...)) nullptr);
} }
private: private:
/// Functors, lambda functions, etc. /// Functors, lambda functions, etc.
template <typename func, typename return_type, typename... arg_type> template <typename Func, typename Return, typename... Arg, typename... Extra>
void initialize(func &&f, const char *name, const char *doc, void initialize(Func &&f, Return (*)(Arg...), Extra&&... extra) {
return_value_policy policy, const function &sibling, struct capture {
bool is_method, return_type (*)(arg_type...)) { typename std::remove_reference<Func>::type f;
std::tuple<Extra...> extra;
typedef arg_value_caster<arg_type...> cast_in;
typedef return_value_caster<return_type> cast_out;
struct capture { typename std::remove_reference<func>::type f; };
void *ptr = new capture { std::forward<func>(f) };
auto impl = [](function_entry *entry, PyObject *pyArgs, PyObject *parent) -> PyObject *{
cast_in args;
if (!args.load(pyArgs, true)) return nullptr;
func &f = ((capture *) entry->data)->f;
return cast_out::cast(args.template call<return_type>(f),
entry->policy, parent);
}; };
initialize(name, doc, cast_in::name() + std::string(" -> ") + cast_out::name(), function_entry *entry = new function_entry();
sibling, is_method, policy, impl, ptr); entry->data = new capture { std::forward<Func>(f), std::tuple<Extra...>(std::forward<Extra>(extra)...) };
typedef arg_value_caster<Arg...> cast_in;
typedef return_value_caster<Return> cast_out;
entry->impl = [](function_entry *entry, PyObject *pyArgs, PyObject *kwargs, PyObject *parent) -> PyObject *{
cast_in args;
if (!args.load(pyArgs, true)) return nullptr;
Func &f = ((capture *) entry->data)->f;
(void)kwargs;
return cast_out::cast(args.template call<Return>(f), entry->policy, parent);
};
entry->signature = cast_in::name();
entry->signature += " -> ";
entry->signature += cast_out::name();
process_args(((capture *) entry->data)->extra, entry);
initialize(entry);
} }
static PyObject *dispatcher(PyObject *self, PyObject *args, PyObject * /* kwargs */) { static PyObject *dispatcher(PyObject *self, PyObject *args, PyObject *kwargs ) {
function_entry *overloads = (function_entry *) PyCapsule_GetPointer(self, nullptr); function_entry *overloads = (function_entry *) PyCapsule_GetPointer(self, nullptr);
PyObject *result = nullptr; PyObject *result = nullptr;
PyObject *parent = PyTuple_Size(args) > 0 ? PyTuple_GetItem(args, 0) : nullptr; PyObject *parent = PyTuple_Size(args) > 0 ? PyTuple_GetItem(args, 0) : nullptr;
try { try {
for (function_entry *it = overloads; it != nullptr; it = it->next) { for (function_entry *it = overloads; it != nullptr; it = it->next) {
if ((result = it->impl(it, args, parent)) != nullptr) if ((result = it->impl(it, args, kwargs, parent)) != nullptr)
break; break;
} }
} catch (const error_already_set &) { return nullptr; } catch (const error_already_set &) { return nullptr;
@ -161,27 +221,16 @@ private:
} }
} }
void initialize(const char *name, const char *doc, void initialize(function_entry *entry) {
const std::string &signature, function sibling, if (entry->name == nullptr)
bool is_method, return_value_policy policy, entry->name = "";
PyObject *(*impl) (function_entry *, PyObject *, PyObject *),
void *data) {
if (name == nullptr)
name = "";
/* Linked list of function call handlers (for overloading) */ entry->is_constructor = !strcmp(entry->name, "__init__");
function_entry *entry = new function_entry();
entry->impl = impl;
entry->is_constructor = !strcmp(name, "__init__");
entry->policy = policy;
entry->signature = signature;
entry->data = data;
if (doc) entry->doc = doc;
if (!sibling.ptr() || !PyCFunction_Check(sibling.ptr())) { if (!entry->sibling || !PyCFunction_Check(entry->sibling)) {
PyMethodDef *def = new PyMethodDef(); PyMethodDef *def = new PyMethodDef();
memset(def, 0, sizeof(PyMethodDef)); memset(def, 0, sizeof(PyMethodDef));
def->ml_name = name != nullptr ? strdup(name) : name; def->ml_name = entry->name;
def->ml_meth = reinterpret_cast<PyCFunction>(*dispatcher); def->ml_meth = reinterpret_cast<PyCFunction>(*dispatcher);
def->ml_flags = METH_VARARGS | METH_KEYWORDS; def->ml_flags = METH_VARARGS | METH_KEYWORDS;
capsule entry_capsule(entry); capsule entry_capsule(entry);
@ -189,7 +238,7 @@ private:
if (!m_ptr) if (!m_ptr)
throw std::runtime_error("cpp_function::cpp_function(): Could not allocate function object"); throw std::runtime_error("cpp_function::cpp_function(): Could not allocate function object");
} else { } else {
m_ptr = sibling.ptr(); m_ptr = entry->sibling;
inc_ref(); inc_ref();
capsule entry_capsule(PyCFunction_GetSelf(m_ptr), true); capsule entry_capsule(PyCFunction_GetSelf(m_ptr), true);
function_entry *parent = (function_entry *) entry_capsule, *backup = parent; function_entry *parent = (function_entry *) entry_capsule, *backup = parent;
@ -199,22 +248,23 @@ private:
entry = backup; entry = backup;
} }
std::string signatures; std::string signatures;
int it = 0; int index = 0;
while (entry) { /* Create pydoc entry */ function_entry *it = entry;
if (sibling.ptr()) while (it) { /* Create pydoc it */
signatures += std::to_string(++it) + ". "; if (it->sibling)
signatures += "Signature : " + std::string(entry->signature) + "\n"; signatures += std::to_string(++index) + ". ";
if (!entry->doc.empty()) signatures += "Signature : " + std::string(it->signature) + "\n";
signatures += "\n" + std::string(entry->doc) + "\n"; if (it->doc && strlen(it->doc) > 0)
if (entry->next) signatures += "\n" + std::string(it->doc) + "\n";
if (it->next)
signatures += "\n"; signatures += "\n";
entry = entry->next; it = it->next;
} }
PyCFunctionObject *func = (PyCFunctionObject *) m_ptr; PyCFunctionObject *func = (PyCFunctionObject *) m_ptr;
if (func->m_ml->ml_doc) if (func->m_ml->ml_doc)
std::free((char *) func->m_ml->ml_doc); std::free((char *) func->m_ml->ml_doc);
func->m_ml->ml_doc = strdup(signatures.c_str()); func->m_ml->ml_doc = strdup(signatures.c_str());
if (is_method) { if (entry->is_method) {
m_ptr = PyInstanceMethod_New(m_ptr); m_ptr = PyInstanceMethod_New(m_ptr);
if (!m_ptr) if (!m_ptr)
throw std::runtime_error("cpp_function::cpp_function(): Could not allocate instance method object"); throw std::runtime_error("cpp_function::cpp_function(): Could not allocate instance method object");
@ -223,15 +273,6 @@ private:
} }
}; };
class cpp_method : public cpp_function {
public:
cpp_method () { }
template <typename func> cpp_method(func &&f, const char *name = nullptr,
const char *doc = nullptr, return_value_policy
policy = return_value_policy::automatic, function sibling = function())
: cpp_function(std::forward<func>(f), name, doc, policy, sibling, true) {}
};
class module : public object { class module : public object {
public: public:
PYBIND_OBJECT_DEFAULT(module, object, PyModule_Check) PYBIND_OBJECT_DEFAULT(module, object, PyModule_Check)
@ -249,12 +290,12 @@ public:
inc_ref(); inc_ref();
} }
template <typename Func> template <typename Func, typename... Extra>
module &def(const char *name, Func f, const char *doc = nullptr, module &def(const char *name_, Func &&f, Extra&& ... extra) {
return_value_policy policy = return_value_policy::automatic) { cpp_function func(std::forward<Func>(f), name(name_),
cpp_function func(f, name, doc, policy, (function) attr(name)); sibling((handle) attr(name_)), std::forward<Extra>(extra)...);
func.inc_ref(); /* The following line steals a reference to 'func' */ func.inc_ref(); /* The following line steals a reference to 'func' */
PyModule_AddObject(ptr(), name, func.ptr()); PyModule_AddObject(ptr(), name_, func.ptr());
return *this; return *this;
} }
@ -270,13 +311,6 @@ public:
}; };
NAMESPACE_BEGIN(detail) NAMESPACE_BEGIN(detail)
/* Forward declarations */
enum op_id : int;
enum op_type : int;
struct undefined_t;
template <op_id id, op_type ot, typename L = undefined_t, typename R = undefined_t> struct op_;
template <typename ... Args> struct init;
/// Basic support for creating new Python heap types /// Basic support for creating new Python heap types
class custom_type : public object { class custom_type : public object {
public: public:
@ -435,6 +469,13 @@ protected:
static void releasebuffer(PyObject *, Py_buffer *view) { delete (buffer_info *) view->internal; } static void releasebuffer(PyObject *, Py_buffer *view) { delete (buffer_info *) view->internal; }
}; };
/* Forward declarations */
enum op_id : int;
enum op_type : int;
struct undefined_t;
template <op_id id, op_type ot, typename L = undefined_t, typename R = undefined_t> struct op_;
template <typename... Args> struct init;
NAMESPACE_END(detail) NAMESPACE_END(detail)
template <typename type, typename holder_type = std::unique_ptr<type>> class class_ : public detail::custom_type { template <typename type, typename holder_type = std::unique_ptr<type>> class class_ : public detail::custom_type {
@ -454,42 +495,41 @@ public:
sizeof(instance_type), init_holder, dealloc, sizeof(instance_type), init_holder, dealloc,
parent.ptr(), doc) { } parent.ptr(), doc) { }
template <typename Func> template <typename Func, typename... Extra>
class_ &def(const char *name, Func f, const char *doc = nullptr, class_ &def(const char *name_, Func&& f, Extra&&... extra) {
return_value_policy policy = return_value_policy::automatic) { attr(name_) = cpp_function(std::forward<Func>(f), name(name_),
attr(name) = cpp_method(f, name, doc, policy, (function) attr(name)); sibling(attr(name_)), is_method(),
std::forward<Extra>(extra)...);
return *this; return *this;
} }
template <typename Func> class_ & template <typename Func, typename... Extra> class_ &
def_static(const char *name, Func f, const char *doc = nullptr, def_static(const char *name_, Func f, Extra&&... extra) {
return_value_policy policy = return_value_policy::automatic) { attr(name_) = cpp_function(std::forward<Func>(f), name(name_),
attr(name) = cpp_function(f, name, doc, policy, (function) attr(name)); sibling(attr(name_)),
std::forward<Extra>(extra)...);
return *this; return *this;
} }
template <detail::op_id id, detail::op_type ot, typename L, typename R> template <detail::op_id id, detail::op_type ot, typename L, typename R, typename... Extra>
class_ &def(const detail::op_<id, ot, L, R> &op, const char *doc = nullptr, class_ &def(const detail::op_<id, ot, L, R> &op, Extra&&... extra) {
return_value_policy policy = return_value_policy::automatic) { op.template execute<type>(*this, std::forward<Extra>(extra)...);
op.template execute<type>(*this, doc, policy);
return *this; return *this;
} }
template <detail::op_id id, detail::op_type ot, typename L, typename R> class_ & template <detail::op_id id, detail::op_type ot, typename L, typename R, typename... Extra>
def_cast(const detail::op_<id, ot, L, R> &op, const char *doc = nullptr, class_ & def_cast(const detail::op_<id, ot, L, R> &op, Extra&&... extra) {
return_value_policy policy = return_value_policy::automatic) { op.template execute_cast<type>(*this, std::forward<Extra>(extra)...);
op.template execute_cast<type>(*this, doc, policy);
return *this; return *this;
} }
template <typename... Args> template <typename... Args, typename... Extra>
class_ &def(const detail::init<Args...> &init, const char *doc = nullptr) { class_ &def(const detail::init<Args...> &init, Extra&&... extra) {
init.template execute<type>(*this, doc); init.template execute<type>(*this, std::forward<Extra>(extra)...);
return *this; return *this;
} }
template <typename Func> template <typename Func> class_& def_buffer(Func &&func) {
class_& def_buffer(Func &&func) {
struct capture { Func func; }; struct capture { Func func; };
capture *ptr = new capture { std::forward<Func>(func) }; capture *ptr = new capture { std::forward<Func>(func) };
install_buffer_funcs([](PyObject *obj, void *ptr) -> buffer_info* { install_buffer_funcs([](PyObject *obj, void *ptr) -> buffer_info* {
@ -501,73 +541,69 @@ public:
return *this; return *this;
} }
template <typename C, typename D> template <typename C, typename D, typename... Extra>
class_ &def_readwrite(const char *name, D C::*pm, class_ &def_readwrite(const char *name, D C::*pm, Extra&&... extra) {
const char *doc = nullptr) { cpp_function fget([pm](const C &c) -> const D &{ return c.*pm; },
cpp_method fget([pm](const C &c) -> const D &{ return c.*pm; }, nullptr, return_value_policy::reference_internal,
nullptr, return_value_policy::reference_internal), is_method(), extra...),
fset([pm](C &c, const D &value) { c.*pm = value; }); fset([pm](C &c, const D &value) { c.*pm = value; },
def_property(name, fget, fset, doc); is_method(), extra...);
def_property(name, fget, fset);
return *this; return *this;
} }
template <typename C, typename D> template <typename C, typename D, typename... Extra>
class_ &def_readonly(const char *name, const D C::*pm, class_ &def_readonly(const char *name, const D C::*pm, Extra&& ...extra) {
const char *doc = nullptr) { cpp_function fget([pm](const C &c) -> const D &{ return c.*pm; },
cpp_method fget([pm](const C &c) -> const D &{ return c.*pm; }, nullptr, return_value_policy::reference_internal,
nullptr, return_value_policy::reference_internal); is_method(), std::forward<Extra>(extra)...);
def_property(name, fget, doc); def_property_readonly(name, fget);
return *this; return *this;
} }
template <typename D> template <typename D, typename... Extra>
class_ &def_readwrite_static(const char *name, D *pm, class_ &def_readwrite_static(const char *name, D *pm, Extra&& ...extra) {
const char *doc = nullptr) {
cpp_function fget([pm](object) -> const D &{ return *pm; }, nullptr, cpp_function fget([pm](object) -> const D &{ return *pm; }, nullptr,
nullptr, return_value_policy::reference_internal), return_value_policy::reference_internal, extra...),
fset([pm](object, const D &value) { *pm = value; }); fset([pm](object, const D &value) { *pm = value; }, extra...);
def_property_static(name, fget, fset, doc); def_property_static(name, fget, fset);
return *this; return *this;
} }
template <typename D> template <typename D, typename... Extra>
class_ &def_readonly_static(const char *name, const D *pm, class_ &def_readonly_static(const char *name, const D *pm, Extra&& ...extra) {
const char *doc = nullptr) {
cpp_function fget([pm](object) -> const D &{ return *pm; }, nullptr, cpp_function fget([pm](object) -> const D &{ return *pm; }, nullptr,
nullptr, return_value_policy::reference_internal); return_value_policy::reference_internal, std::forward<Extra>(extra)...);
def_property_static(name, fget, doc); def_property_readonly_static(name, fget);
return *this; return *this;
} }
class_ &def_property(const char *name, const cpp_method &fget, class_ &def_property_readonly(const char *name, const cpp_function &fget) {
const char *doc = nullptr) { def_property(name, fget, cpp_function());
def_property(name, fget, cpp_method(), doc);
return *this; return *this;
} }
class_ &def_property_static(const char *name, const cpp_function &fget, class_ &def_property_readonly_static(const char *name, const cpp_function &fget) {
const char *doc = nullptr) { def_property_static(name, fget, cpp_function());
def_property_static(name, fget, cpp_function(), doc);
return *this; return *this;
} }
class_ &def_property(const char *name, const cpp_method &fget, class_ &def_property(const char *name, const cpp_function &fget, const cpp_function &fset) {
const cpp_method &fset, const char *doc = nullptr) {
object property( object property(
PyObject_CallFunction((PyObject *)&PyProperty_Type, PyObject_CallFunction((PyObject *)&PyProperty_Type,
const_cast<char *>("OOOs"), fget.ptr() ? fget.ptr() : Py_None, const_cast<char *>("OOOO"), fget.ptr() ? fget.ptr() : Py_None,
fset.ptr() ? fset.ptr() : Py_None, Py_None, doc), false); fset.ptr() ? fset.ptr() : Py_None, Py_None,
((object) const_cast<cpp_function&>(fget).attr("__doc__")).ptr()), false);
attr(name) = property; attr(name) = property;
return *this; return *this;
} }
class_ &def_property_static(const char *name, const cpp_function &fget, class_ &def_property_static(const char *name, const cpp_function &fget, const cpp_function &fset) {
const cpp_function &fset,
const char *doc = nullptr) {
object property( object property(
PyObject_CallFunction((PyObject *)&PyProperty_Type, PyObject_CallFunction((PyObject *)&PyProperty_Type,
const_cast<char *>("OOOs"), fget.ptr() ? fget.ptr() : Py_None, const_cast<char *>("OOOO"), fget.ptr() ? fget.ptr() : Py_None,
fset.ptr() ? fset.ptr() : Py_None, Py_None, doc), false); fset.ptr() ? fset.ptr() : Py_None, Py_None,
((object) const_cast<cpp_function&>(fget).attr("__doc__")).ptr()), false);
metaclass().attr(name) = property; metaclass().attr(name) = property;
return *this; return *this;
} }
@ -627,9 +663,9 @@ private:
NAMESPACE_BEGIN(detail) NAMESPACE_BEGIN(detail)
template <typename... Args> struct init { template <typename... Args> struct init {
template <typename Base, typename Holder> void execute(pybind::class_<Base, Holder> &class_, const char *doc) const { template <typename Base, typename Holder, typename... Extra> void execute(pybind::class_<Base, Holder> &class_, Extra&&... extra) const {
/// Function which calls a specific C++ in-place constructor /// Function which calls a specific C++ in-place constructor
class_.def("__init__", [](Base *instance, Args... args) { new (instance) Base(args...); }, doc); class_.def("__init__", [](Base *instance, Args... args) { new (instance) Base(args...); }, std::forward<Extra>(extra)...);
} }
}; };
NAMESPACE_END(detail) NAMESPACE_END(detail)