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-rw-r--r--docs/control-structures.rst37
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diff --git a/docs/control-structures.rst b/docs/control-structures.rst
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@@ -106,6 +106,43 @@ of unused parameters (especially return parameters) can be omitted.
}
}
+.. index:: ! new, contracts;creating
+
+.. _creating-contracts:
+
+Creating Contracts via new
+==========================
+
+A contract can create a new contract using the ``new`` keyword. The full
+code of the contract to be created has to be known and thus recursive
+creation-dependencies are now possible.
+
+::
+
+ contract D {
+ uint x;
+ function D(uint a) {
+ x = a;
+ }
+ }
+ contract C {
+ D d = new D(4); // will be executed as part of C's constructor
+
+ function createD(uint arg) {
+ D newD = new D(arg);
+ }
+
+ function createAndEndowD(uint arg, uint amount) {
+ // Send ether along with the creation
+ D newD = (new D).value(amount)(arg);
+ }
+ }
+
+As seen in the example, it is possible to forward Ether to the creation,
+but it is not possible to limit the amount of gas. If the creation fails
+(due to out-of-stack, not enough balance or other problems), an exception
+is thrown.
+
Order of Evaluation of Expressions
==================================