Do not hide unsafe blocks within macro expansions (#73)

Author: espenalb

src/coding-guidelines/macros.rst

@@ -301,4 +301,45 @@ Macros
         fn example_function() {
             // Compliant implementation
         }
+   
+.. guideline:: Do not hide unsafe blocks within macro expansions
+   :id: gui_FRLaMIMb4t3S                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
+   :category: required                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
+   :status: draft                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
+   :release: todo                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
+   :fls: fls_4vjbkm4ceymk
+   :decidability: todo
+   :scope: todo
+   :tags: reduce-human-error
+
+   Description of the guideline goes here.
+
+   .. rationale:: 
+      :id: rat_WJubG7KuUDLW
+      :status: draft
+
+      Explanation of why this guideline is important.
+
+   .. non_compliant_example::
+      :id: non_compl_ex_AyFnP0lJLHxi
+      :status: draft
+
+      Explanation of code example.
 
+      .. code-block:: rust
+
+        fn example_function() {
+            // Non-compliant implementation
+        }
+
+   .. compliant_example::
+      :id: compl_ex_pO5gP1aj2v4F
+      :status: draft
+
+      Explanation of code example.
+
+      .. code-block:: rust
+
+        fn example_function() {
+            // Compliant implementation
+        }