diff options
Diffstat (limited to 'docs/control-structures.rst')
-rw-r--r-- | docs/control-structures.rst | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/docs/control-structures.rst b/docs/control-structures.rst index eb337928..ac24a5a9 100644 --- a/docs/control-structures.rst +++ b/docs/control-structures.rst @@ -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 ================================== |