Clean up error handling in NIFStream reading

No particular reason to introduce is_arithmetic specifically for 16-bit floats, there's no significant code duplication
Bypassing getBoolean() could be error-prone for records that are shared between pre-4.2 and post-4.2 formats

components/nif/nifstream.hpp

@@ -26,20 +26,16 @@ namespace Nif
 
     class Reader;
 
-    template <class T>
-    struct is_arithmetic
-        : std::integral_constant<bool, std::is_arithmetic_v<T> || std::is_same<T, Misc::float16_t>::value>
-    {
-    };
-
     template <std::size_t numInstances, typename T>
     inline void readLittleEndianBufferOfType(Files::IStreamPtr& pIStream, T* dest)
     {
-        static_assert(is_arithmetic<T>(), "Buffer element type is not arithmetic");
+        static_assert(
+            std::is_arithmetic_v<T> || std::is_same_v<T, Misc::float16_t>, "Buffer element type is not arithmetic");
+        static_assert(!std::is_same_v<T, bool>, "Buffer element type is boolean");
         pIStream->read((char*)dest, numInstances * sizeof(T));
         if (pIStream->bad())
-            throw std::runtime_error("Failed to read little endian typed (" + std::string(typeid(T).name())
-                + ") buffer of " + std::to_string(numInstances) + " instances");
+            throw std::runtime_error("Failed to read typed (" + std::string(typeid(T).name()) + ") buffer of "
+                + std::to_string(numInstances) + " instances");
         if constexpr (Misc::IS_BIG_ENDIAN)
             for (std::size_t i = 0; i < numInstances; i++)
                 Misc::swapEndiannessInplace(dest[i]);
@@ -48,11 +44,13 @@ namespace Nif
     template <typename T>
     inline void readLittleEndianDynamicBufferOfType(Files::IStreamPtr& pIStream, T* dest, std::size_t numInstances)
     {
-        static_assert(is_arithmetic<T>(), "Buffer element type is not arithmetic");
+        static_assert(
+            std::is_arithmetic_v<T> || std::is_same_v<T, Misc::float16_t>, "Buffer element type is not arithmetic");
+        static_assert(!std::is_same_v<T, bool>, "Buffer element type is boolean");
         pIStream->read((char*)dest, numInstances * sizeof(T));
         if (pIStream->bad())
-            throw std::runtime_error(
-                "Failed to read little endian dynamic buffer of " + std::to_string(numInstances) + " instances");
+            throw std::runtime_error("Failed to read typed (" + std::string(typeid(T).name()) + ") dynamic buffer of "
+                + std::to_string(numInstances) + " instances");
         if constexpr (Misc::IS_BIG_ENDIAN)
             for (std::size_t i = 0; i < numInstances; i++)
                 Misc::swapEndiannessInplace(dest[i]);