From c008403262c8a559156d613cc288a10d4d9b4a5a Mon Sep 17 00:00:00 2001
From: elenadimitrova <elenavdimitrova@gmail.com>
Date: Sun, 31 Dec 2017 16:29:45 +0200
Subject: [PATCH] Add section on Constructors in documentation

---
 docs/contracts.rst | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/docs/contracts.rst b/docs/contracts.rst
index fcc26b247397..273a9923c849 100644
--- a/docs/contracts.rst
+++ b/docs/contracts.rst
@@ -953,6 +953,29 @@ not known in the context of the class where it is used,
 although its type is known. This is similar for ordinary
 virtual method lookup.
 
+.. index:: ! constructor
+
+Constructors
+============
+Constructor is an optional function with the same name as the contract which is executed upon contract creation. 
+Constructor functions can be either ``public`` or ``internal``.
+
+::
+
+    contract A {
+    uint public a;
+
+        function A(uint _a) internal {
+            a = _a;
+        }
+    }
+
+    contract B is A(1) {
+        function B() public {}
+    }
+
+A constructor set as ``internal`` causes the contract to be marked as :ref:`abstract <abstract-contract>`. Child contracts of an abstract contract can call the super constructor.
+
 .. index:: ! base;constructor
 
 Arguments for Base Constructors
@@ -1025,6 +1048,8 @@ As an exception, a state variable getter can override a public function.
 
 .. index:: ! contract;abstract, ! abstract contract
 
+.. _abstract-contract:
+
 ******************
 Abstract Contracts
 ******************