chore: import upstream snapshot with attribution

2026-07-13 13:17:40 +08:00
commit f1825c8ceb
10096 changed files with 2364182 additions and 0 deletions
@@ -0,0 +1,36 @@
+# Currently Cython does not support std::optional.
+# See: https://github.com/cython/cython/pull/3294
+from libcpp cimport bool
+
+cdef extern from "<optional>" namespace "std" nogil:
+    cdef cppclass nullopt_t:
+        nullopt_t()
+
+    cdef nullopt_t nullopt
+
+    cdef cppclass optional[T]:
+        ctypedef T value_type
+        optional()
+        optional(nullopt_t)
+        optional(optional&) except +
+        optional(T&) except +
+        bool has_value()
+        T& value()
+        T& value_or[U](U& default_value)
+        void swap(optional&)
+        void reset()
+        T& emplace(...)
+        T& operator*()
+        # T* operator->() # Not Supported
+        optional& operator=(optional&)
+        optional& operator=[U](U&)
+        bool operator bool()
+        bool operator!()
+        bool operator==[U](optional&, U&)
+        bool operator!=[U](optional&, U&)
+        bool operator<[U](optional&, U&)
+        bool operator>[U](optional&, U&)
+        bool operator<=[U](optional&, U&)
+        bool operator>=[U](optional&, U&)
+
+    optional[T] make_optional[T](...) except +