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-rw-r--r--doc/developer-notes.md8
1 files changed, 8 insertions, 0 deletions
diff --git a/doc/developer-notes.md b/doc/developer-notes.md
index ec6abda91e..a596ea0117 100644
--- a/doc/developer-notes.md
+++ b/doc/developer-notes.md
@@ -425,6 +425,14 @@ Source code organization
- *Rationale*: Shorter and simpler header files are easier to read, and reduce compile time
+- Every `.cpp` and `.h` file should `#include` every header file it directly uses classes, functions or other
+ definitions from, even if those headers are already included indirectly through other headers. One exception
+ is that a `.cpp` file does not need to re-include the includes already included in its corresponding `.h` file.
+
+ - *Rationale*: Excluding headers because they are already indirectly included results in compilation
+ failures when those indirect dependencies change. Furthermore, it obscures what the real code
+ dependencies are.
+
- Don't import anything into the global namespace (`using namespace ...`). Use
fully specified types such as `std::string`.