more style rules

1 files changed, 18 insertions, 0 deletions

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e946c8d..b4b04f2 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -117,3 +117,21 @@ x++
 
 Even if they are not strictly needed due to operator precedence rules,
 prefer adding extra ()'s around tests for clarity, with parcimony.
+
+### c++ cast
+
+don't use reinterpret_cast<>, static_cast<> or const_cast<>.
+
+### pointer declaration
+
+prefer ```const T* name``` to ```const T *name```.
+
+### 'auto' type
+
+Don't use 'auto' as type, unless for complex iterators or very complex
+types.
+
+### don't use trailing spaces
+
+don't.
+