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Diffstat (limited to 'docs/contracts.rst')
-rw-r--r-- | docs/contracts.rst | 40 |
1 files changed, 13 insertions, 27 deletions
diff --git a/docs/contracts.rst b/docs/contracts.rst index cdc92315..ef1e1be6 100644 --- a/docs/contracts.rst +++ b/docs/contracts.rst @@ -198,7 +198,6 @@ In the following example, ``D``, can call ``c.getData()`` to retrieve the value function compute(uint a, uint b) internal returns (uint) { return a+b; } } - contract D { function readData() { C c = new C(); @@ -209,7 +208,6 @@ In the following example, ``D``, can call ``c.getData()`` to retrieve the value } } - contract E is C { function g() { C c = new C(); @@ -238,7 +236,6 @@ be done at declaration. uint public data = 42; } - contract Caller { C c = new C(); function f() { @@ -321,7 +318,6 @@ inheritable properties of contracts and may be overridden by derived contracts. } } - contract mortal is owned { // This contract inherits the "onlyOwner"-modifier from // "owned" and applies it to the "close"-function, which @@ -332,7 +328,6 @@ inheritable properties of contracts and may be overridden by derived contracts. } } - contract priced { // Modifiers can receive arguments: modifier costs(uint price) { @@ -342,7 +337,6 @@ inheritable properties of contracts and may be overridden by derived contracts. } } - contract Register is priced, owned { mapping (address => bool) registeredAddresses; uint price; @@ -570,7 +564,6 @@ Please ensure you test your fallback function thoroughly to ensure the execution function() payable { } } - contract Caller { function callTest(Test test) { test.call(0xabcdef01); // hash does not exist @@ -687,12 +680,19 @@ as topics. The event call above can be performed in the same way as :: - log3( - msg.value, - 0x50cb9fe53daa9737b786ab3646f04d0150dc50ef4e75f59509d83667ad5adb20, - msg.sender, - _id - ); + pragma solidity ^0.4.10; + + contract C { + function f() { + bytes32 _id = 0x420042; + log3( + bytes32(msg.value), + bytes32(0x50cb9fe53daa9737b786ab3646f04d0150dc50ef4e75f59509d83667ad5adb20), + bytes32(msg.sender), + _id + ); + } + } where the long hexadecimal number is equal to ``keccak256("Deposit(address,hash256,uint256)")``, the signature of the event. @@ -734,7 +734,6 @@ Details are given in the following example. address owner; } - // Use "is" to derive from another contract. Derived // contracts can access all non-private members including // internal functions and state variables. These cannot be @@ -745,7 +744,6 @@ Details are given in the following example. } } - // These abstract contracts are only provided to make the // interface known to the compiler. Note the function // without body. If a contract does not implement all @@ -754,13 +752,11 @@ Details are given in the following example. function lookup(uint id) returns (address adr); } - contract NameReg { function register(bytes32 name); function unregister(); } - // Multiple inheritance is possible. Note that "owned" is // also a base class of "mortal", yet there is only a single // instance of "owned" (as for virtual inheritance in C++). @@ -786,7 +782,6 @@ Details are given in the following example. } } - // If a constructor takes an argument, it needs to be // provided in the header (or modifier-invocation-style at // the constructor of the derived contract (see below)). @@ -821,12 +816,10 @@ seen in the following example:: function kill() { /* do cleanup 1 */ mortal.kill(); } } - contract Base2 is mortal { function kill() { /* do cleanup 2 */ mortal.kill(); } } - contract Final is Base1, Base2 { } @@ -848,7 +841,6 @@ derived override, but this function will bypass } } - contract Base1 is mortal { function kill() { /* do cleanup 1 */ super.kill(); } } @@ -858,7 +850,6 @@ derived override, but this function will bypass function kill() { /* do cleanup 2 */ super.kill(); } } - contract Final is Base2, Base1 { } @@ -888,7 +879,6 @@ the base constructors. This can be done in two ways:: function Base(uint _x) { x = _x; } } - contract Derived is Base(7) { function Derived(uint _y) Base(_y * _y) { } @@ -1081,7 +1071,6 @@ more advanced example to implement a set). } } - contract C { Set.Data knownValues; @@ -1157,7 +1146,6 @@ custom types without the overhead of external function calls: } } - contract C { using BigInt for BigInt.bigint; @@ -1250,7 +1238,6 @@ Let us rewrite the set example from the } } - contract C { using Set for Set.Data; // this is the crucial change Set.Data knownValues; @@ -1276,7 +1263,6 @@ It is also possible to extend elementary types in that way:: } } - contract C { using Search for uint[]; uint[] data; |