ext: Updated Pybind11 to version 2.4.1.

This updates Pybind11 from version 2.2.1 to version 2.4.1. This fixes
warning/error received when "<experiment/optional>" is used when
compiling using c++14 with clang. It should be noted that
"ext/pybind11/include/pybind11/std.h" has been changed to include a fix
added by commit ba42457254cc362eddc099f22b60d469cc6369e0. This is
necessary to avoid build errors.

Built: Linux (gcc, c++11) and MacOS (clang, c++14).
Tested: Ran quick tests for X86, ARM, and RISC-V.
Deprecates: https://gem5-review.googlesource.com/c/public/gem5/+/21019
Change-Id: Ie9783511cb6be50136076a55330e645f4f36d075
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/21119
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/ext/pybind11/tests/test_builtin_casters.py b/ext/pybind11/tests/test_builtin_casters.py
index bc094a381..73cc465f5 100644
--- a/ext/pybind11/tests/test_builtin_casters.py
+++ b/ext/pybind11/tests/test_builtin_casters.py
@@ -44,6 +44,7 @@ def test_single_char_arguments():
     toolong_message = "Expected a character, but multi-character string found"
 
     assert m.ord_char(u'a') == 0x61  # simple ASCII
+    assert m.ord_char_lv(u'b') == 0x62
     assert m.ord_char(u'é') == 0xE9  # requires 2 bytes in utf-8, but can be stuffed in a char
     with pytest.raises(ValueError) as excinfo:
         assert m.ord_char(u'Ā') == 0x100  # requires 2 bytes, doesn't fit in a char
@@ -54,9 +55,11 @@ def test_single_char_arguments():
 
     assert m.ord_char16(u'a') == 0x61
     assert m.ord_char16(u'é') == 0xE9
+    assert m.ord_char16_lv(u'ê') == 0xEA
     assert m.ord_char16(u'Ā') == 0x100
     assert m.ord_char16(u'‽') == 0x203d
     assert m.ord_char16(u'♥') == 0x2665
+    assert m.ord_char16_lv(u'♡') == 0x2661
     with pytest.raises(ValueError) as excinfo:
         assert m.ord_char16(u'🎂') == 0x1F382  # requires surrogate pair
     assert str(excinfo.value) == toobig_message(0x10000)
@@ -320,3 +323,20 @@ def test_numpy_bool():
     assert convert(np.bool_(False)) is False
     assert noconvert(np.bool_(True)) is True
     assert noconvert(np.bool_(False)) is False
+
+
+def test_int_long():
+    """In Python 2, a C++ int should return a Python int rather than long
+    if possible: longs are not always accepted where ints are used (such
+    as the argument to sys.exit()). A C++ long long is always a Python
+    long."""
+
+    import sys
+    must_be_long = type(getattr(sys, 'maxint', 1) + 1)
+    assert isinstance(m.int_cast(), int)
+    assert isinstance(m.long_cast(), int)
+    assert isinstance(m.longlong_cast(), must_be_long)
+
+
+def test_void_caster_2():
+    assert m.test_void_caster()