fix: never use `..` in a header include (#5321)

* fix: never use `..` in a header include

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* fix: one more parent include

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

---------

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

include/pybind11/detail/class.h

@@ -9,8 +9,8 @@
 
 #pragma once
 
-#include "../attr.h"
+#include <pybind11/attr.h>
-#include "../options.h"
+#include <pybind11/options.h>
 
 PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
 PYBIND11_NAMESPACE_BEGIN(detail)

include/pybind11/detail/internals.h

@@ -12,10 +12,10 @@
 #include "common.h"
 
 #if defined(PYBIND11_SIMPLE_GIL_MANAGEMENT)
-#    include "../gil.h"
+#    include <pybind11/gil.h>
 #endif
 
-#include "../pytypes.h"
+#include <pybind11/pytypes.h>
 
 #include <exception>
 #include <mutex>

include/pybind11/detail/type_caster_base.h

@@ -9,7 +9,8 @@
 
 #pragma once
 
-#include "../pytypes.h"
+#include <pybind11/pytypes.h>
+
 #include "common.h"
 #include "descr.h"
 #include "internals.h"

include/pybind11/eigen/matrix.h

@@ -9,7 +9,8 @@
 
 #pragma once
 
-#include "../numpy.h"
+#include <pybind11/numpy.h>
+
 #include "common.h"
 
 /* HINT: To suppress warnings originating from the Eigen headers, use -isystem.

include/pybind11/eigen/tensor.h

@@ -7,7 +7,8 @@
 
 #pragma once
 
-#include "../numpy.h"
+#include <pybind11/numpy.h>
+
 #include "common.h"
 
 #if defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER)

include/pybind11/stl/filesystem.h

@@ -4,11 +4,11 @@
 
 #pragma once
 
-#include "../pybind11.h"
+#include <pybind11/cast.h>
-#include "../detail/common.h"
+#include <pybind11/detail/common.h>
-#include "../detail/descr.h"
+#include <pybind11/detail/descr.h>
-#include "../cast.h"
+#include <pybind11/pybind11.h>
-#include "../pytypes.h"
+#include <pybind11/pytypes.h>
 
 #include <string>