Specify that try-catch blocks are forbidden in cpp_usage_guidelines.rst

contributing/development/core_and_modules/common_engine_methods_and_macros.rst

@@ -182,6 +182,8 @@ repetition:
 It's recommended to use ``GLOBAL_DEF``/``EDITOR_DEF`` only once per setting and
 use ``GLOBAL_GET``/``EDITOR_GET`` in all other places where it's referenced.
 
+.. _doc_common_engine_methods_and_macros_error_macros:
+
 Error macros
 ------------
 

contributing/development/cpp_usage_guidelines.rst

@@ -100,6 +100,15 @@ pull request.
 To follow the existing style, please use standard ``#ifdef``-based include
 guards instead of ``#pragma once`` in new files.
 
+``try``-``catch`` blocks
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+C++ style exception handling using ``try`` and ``catch`` blocks is forbidden.
+This restriction is in place for several reasons, including performance, binary
+size and code complexity.
+Use :ref:`doc_common_engine_methods_and_macros_error_macros` instead.
+
+
 .. seealso::
 
     See :ref:`doc_code_style_guidelines_header_includes` for guidelines on sorting