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-rw-r--r--docs/style-guide.rst18
1 files changed, 17 insertions, 1 deletions
diff --git a/docs/style-guide.rst b/docs/style-guide.rst
index 7b48ccad..68fee871 100644
--- a/docs/style-guide.rst
+++ b/docs/style-guide.rst
@@ -809,7 +809,23 @@ possible permutations for function declarations.
Mappings
========
-TODO
+In variable declarations, do not separate the keyword ``mapping`` from its
+type by a space. Do not separate any nested ``mapping`` keyword from its type by
+whitespace.
+
+Yes::
+
+ mapping(uint => uint) map;
+ mapping(address => bool) registeredAddresses;
+ mapping(uint => mapping(bool => Data[])) public data;
+ mapping(uint => mapping(uint => s)) data;
+
+No::
+
+ mapping (uint => uint) map;
+ mapping( address => bool ) registeredAddresses;
+ mapping (uint => mapping (bool => Data[])) public data;
+ mapping(uint => mapping (uint => s)) data;
Variable Declarations
=====================