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Removing MSVC C4100 from pragma block at the top of pybind11.h (#3150)

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* Removing pragma for 4100 (to see what is still broken with the latest code).

* Adding --keep-going

* Revert "Adding --keep-going"

This reverts commit 1c844c6ffd07a6111b644811e7e3b0a50b9d44bb.

* Introducing PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100.

* _MSC_VER <= 1916

* Replacing simple variadic function with variadic template (attempt to resolve MSVC 2017 failures).

* Preserving existing comment (moved from pybind11.h to detail/common.h).

* Adding blank lines for readability.
This commit is contained in:
Ralf W. Grosse-Kunstleve 2021-07-28 17:01:21 -07:00 committed by GitHub
parent f4721a7b44
commit b72ca7d1bd
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 27 additions and 1 deletions
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5
include/pybind11/attr.h
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@ -516,18 +516,22 @@ template <size_t Nurse, size_t Patient> struct process_attribute<keep_alive<Nurs
/// Recursively iterate over variadic template arguments
template <typename... Args> struct process_attributes {
static void init(const Args&... args, function_record *r) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(r);
int unused[] = { 0, (process_attribute<typename std::decay<Args>::type>::init(args, r), 0) ... };
ignore_unused(unused);
}
static void init(const Args&... args, type_record *r) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(r);
int unused[] = { 0, (process_attribute<typename std::decay<Args>::type>::init(args, r), 0) ... };
ignore_unused(unused);
}
static void precall(function_call &call) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(call);
int unused[] = { 0, (process_attribute<typename std::decay<Args>::type>::precall(call), 0) ... };
ignore_unused(unused);
}
static void postcall(function_call &call, handle fn_ret) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(call, fn_ret);
int unused[] = { 0, (process_attribute<typename std::decay<Args>::type>::postcall(call, fn_ret), 0) ... };
ignore_unused(unused);
}
@ -545,6 +549,7 @@ template <typename... Extra,
size_t named = constexpr_sum(std::is_base_of<arg, Extra>::value...),
size_t self = constexpr_sum(std::is_same<is_method, Extra>::value...)>
constexpr bool expected_num_args(size_t nargs, bool has_args, bool has_kwargs) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(nargs, has_args, has_kwargs);
return named == 0 || (self + named + size_t(has_args) + size_t(has_kwargs)) == nargs;
}

1
include/pybind11/cast.h
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@ -605,6 +605,7 @@ protected:
/* Implementation: Convert a C++ tuple into a Python tuple */
template <typename T, size_t... Is>
static handle cast_impl(T &&src, return_value_policy policy, handle parent, index_sequence<Is...>) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(src, policy, parent);
std::array<object, size> entries{{
reinterpret_steal<object>(make_caster<Ts>::cast(std::get<Is>(std::forward<T>(src)), policy, parent))...
}};

13
include/pybind11/detail/common.h
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@ -913,5 +913,18 @@ inline static std::shared_ptr<T> try_get_shared_from_this(std::enable_shared_fro
#endif
}
#if defined(_MSC_VER) && _MSC_VER <= 1916
// warning C4100: Unreferenced formal parameter
template <typename... Args>
inline constexpr void workaround_incorrect_msvc_c4100(Args &&...) {}
# define PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(...) \
detail::workaround_incorrect_msvc_c4100(__VA_ARGS__)
#else
# define PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(...)
#endif
PYBIND11_NAMESPACE_END(detail)
PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)

1
include/pybind11/detail/descr.h
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@ -42,6 +42,7 @@ struct descr {
template <size_t N1, size_t N2, typename... Ts1, typename... Ts2, size_t... Is1, size_t... Is2>
constexpr descr<N1 + N2, Ts1..., Ts2...> plus_impl(const descr<N1, Ts1...> &a, const descr<N2, Ts2...> &b,
index_sequence<Is1...>, index_sequence<Is2...>) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(b);
return {a.text[Is1]..., b.text[Is2]...};
}

3
include/pybind11/detail/init.h
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@ -94,6 +94,7 @@ void construct(...) {
// construct an Alias from the returned base instance.
template <typename Class>
void construct(value_and_holder &v_h, Cpp<Class> *ptr, bool need_alias) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(need_alias);
no_nullptr(ptr);
if (Class::has_alias && need_alias && !is_alias<Class>(ptr)) {
// We're going to try to construct an alias by moving the cpp type. Whether or not
@ -131,6 +132,7 @@ void construct(value_and_holder &v_h, Alias<Class> *alias_ptr, bool) {
// derived type (through those holder's implicit conversion from derived class holder constructors).
template <typename Class>
void construct(value_and_holder &v_h, Holder<Class> holder, bool need_alias) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(need_alias);
auto *ptr = holder_helper<Holder<Class>>::get(holder);
no_nullptr(ptr);
// If we need an alias, check that the held pointer is actually an alias instance
@ -148,6 +150,7 @@ void construct(value_and_holder &v_h, Holder<Class> holder, bool need_alias) {
// need it, we simply move-construct the cpp value into a new instance.
template <typename Class>
void construct(value_and_holder &v_h, Cpp<Class> &&result, bool need_alias) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(need_alias);
static_assert(std::is_move_constructible<Cpp<Class>>::value,
"pybind11::init() return-by-value factory function requires a movable class");
if (Class::has_alias && need_alias)

2
include/pybind11/detail/type_caster_base.h
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@ -930,6 +930,7 @@ protected:
does not have a private operator new implementation. */
template <typename T, typename = enable_if_t<is_copy_constructible<T>::value>>
static auto make_copy_constructor(const T *x) -> decltype(new T(*x), Constructor{}) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(x);
return [](const void *arg) -> void * {
return new T(*reinterpret_cast<const T *>(arg));
};
@ -937,6 +938,7 @@ protected:
template <typename T, typename = enable_if_t<std::is_move_constructible<T>::value>>
static auto make_move_constructor(const T *x) -> decltype(new T(std::move(*const_cast<T *>(x))), Constructor{}) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(x);
return [](const void *arg) -> void * {
return new T(std::move(*const_cast<T *>(reinterpret_cast<const T *>(arg))));
};

3
include/pybind11/pybind11.h
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@ -12,7 +12,6 @@
#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
# pragma warning(push)
# pragma warning(disable: 4100) // warning C4100: Unreferenced formal parameter
# pragma warning(disable: 4127) // warning C4127: Conditional expression is constant
# pragma warning(disable: 4505) // warning C4505: 'PySlice_GetIndicesEx': unreferenced local function has been removed (PyPy only)
#elif defined(__GNUG__) && !defined(__clang__) && !defined(__INTEL_COMPILER)
@ -1388,12 +1387,14 @@ public:
template <typename... Args, typename... Extra>
class_ &def(const detail::initimpl::constructor<Args...> &init, const Extra&... extra) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(init);
init.execute(*this, extra...);
return *this;
}
template <typename... Args, typename... Extra>
class_ &def(const detail::initimpl::alias_constructor<Args...> &init, const Extra&... extra) {
PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(init);
init.execute(*this, extra...);
return *this;
}