fix WrappedArray.index not including the last item in the array

Author: apple1417

src/pyunrealsdk/unreal_bindings/wrapped_array.cpp

@@ -159,7 +159,7 @@ void register_wrapped_array(py::module_& mod) {
              "    stop: The index to stop searching before. Defaults to the end of the array.\n"
              "Returns:\n"
              "    The first index of the value in the array.",
-             "value"_a, "start"_a = 0, "stop"_a = -1)
+             "value"_a, "start"_a = 0, "stop"_a = std::numeric_limits<py::ssize_t>::max())
         .def("insert", &impl::array_py_insert,
              "Inserts an item into the array before the given index.\n"
              "\n"

src/pyunrealsdk/unreal_bindings/wrapped_array.h

@@ -88,7 +88,7 @@ struct ArrayIterator {
      * @brief Construct a new iterator.
      *
      * @param arr The array to iterate over.
-     * @param idx The idnex to start iterating at.
+     * @param idx The index to start iterating at.
      */
     ArrayIterator(const WrappedArray& arr, size_t idx);
 

src/pyunrealsdk/unreal_bindings/wrapped_array_methods.cpp

@@ -63,15 +63,38 @@ size_t array_py_index(const WrappedArray& self,
                       py::ssize_t stop) {
     array_validate_value(self, value);
 
-    auto end = ArrayIterator{self, convert_py_idx(self, stop)};
+    // `list.index` method handles indexes a little differently to most methods. Essentially, any
+    // index is allowed, and it's just implicitly clamped to the size of the array. You're allowed
+    // to do some stupid things like `["a"].index("a", -100, -200)`, it just gives a not in list
+    // error.
+
+    // Firstly, wrap negative indexes
+    auto size = static_cast<py::ssize_t>(self.size());
+    if (start < 0) {
+        start += size;
+    }
+    if (stop < 0) {
+        stop += size;
+    }
+
+    // Clamp to the start of the array
+    start = std::max(start, py::ssize_t{0});
+    stop = std::max(stop, py::ssize_t{0});
 
-    auto location = std::find_if(ArrayIterator{self, convert_py_idx(self, start)}, end,
-                                 [&value](const auto& other) { return value.equal(other); });
-    if (location == end) {
-        throw py::value_error(
-            unrealsdk::fmt::format("{} is not in array", std::string(py::repr(value))));
+    // Make sure the start is actually before the stop
+    if (start < stop) {
+        // If the stop index is beyond the end, this automatically becomes an end of array iterator
+        auto end = ArrayIterator{self, static_cast<size_t>(stop)};
+
+        auto location = std::find_if(ArrayIterator{self, static_cast<size_t>(start)}, end,
+                                     [&value](const auto& other) { return value.equal(other); });
+        if (location != end) {
+            return location.idx;
+        }
     }
-    return location.idx;
+
+    throw py::value_error(
+        unrealsdk::fmt::format("{} is not in array", std::string(py::repr(value))));
 }
 
 void array_py_insert(WrappedArray& self, py::ssize_t py_idx, const py::object& value) {

stubs/unrealsdk/unreal/_wrapped_array.pyi

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import sys
 from collections.abc import Callable, Iterator, Sequence
 from types import GenericAlias
 from typing import Any, Never, Self, overload
@@ -188,7 +189,7 @@ class WrappedArray[T]:
         Args:
             values: The sequence of values to append.
         """
-    def index(self, value: T, start: int = 0, stop: int = -1) -> int:
+    def index(self, value: T, start: int = 0, stop: int = sys.maxsize) -> int:
         """
         Finds the first index of the given value in the array.