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Removing MSVC C4127 from pragma block at the top of pybind11.h (#3152)

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* Removing pragma for 4127 (to see what is still broken with the latest code).

* Using new constexpr_bool() to suppress warning C4127.

* One missed case, Python 2 only.

* PYBIND11_SILENCE_MSVC_C4127 (more similar to the approach for C4100).
This commit is contained in:
Ralf W. Grosse-Kunstleve
2021-07-30 11:25:29 -07:00
committed by GitHub
parent e2573dc961
commit dcbda8d7ff
5 changed files with 28 additions and 18 deletions
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include/pybind11/pybind11.h
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@@ -10,10 +10,7 @@
#pragma once
#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
# pragma warning(push)
# pragma warning(disable: 4127) // warning C4127: Conditional expression is constant
#elif defined(__GNUG__) && !defined(__clang__) && !defined(__INTEL_COMPILER)
#if defined(__GNUG__) && !defined(__clang__) && !defined(__INTEL_COMPILER)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wunused-but-set-parameter"
# pragma GCC diagnostic ignored "-Wattributes"
@@ -166,7 +163,7 @@ protected:
auto rec = unique_rec.get();
/* Store the capture object directly in the function record if there is enough space */
if (sizeof(capture) <= sizeof(rec->data)) {
if (PYBIND11_SILENCE_MSVC_C4127(sizeof(capture) <= sizeof(rec->data))) {
/* Without these pragmas, GCC warns that there might not be
enough space to use the placement new operator. However, the
'if' statement above ensures that this is the case. */
@@ -2388,8 +2385,6 @@ PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)
# pragma GCC diagnostic pop // -Wnoexcept-type
#endif
#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
# pragma warning(pop)
#elif defined(__GNUG__) && !defined(__clang__) && !defined(__INTEL_COMPILER)
#if defined(__GNUG__) && !defined(__clang__) && !defined(__INTEL_COMPILER)
# pragma GCC diagnostic pop
#endif