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Fix bugs in example contracts

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This commit is contained in:
Alex Beregszaszi
2017-07-13 21:47:29 +02:00
committed by chriseth
parent b2fcd59ee6
commit 41e5b2c3c2
4 changed files with 42 additions and 11 deletions
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docs/contracts.rst
+26 -5
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@@ -213,6 +213,8 @@ In the following example, ``D``, can call ``c.getData()`` to retrieve the value
::
// This will not compile
pragma solidity ^0.4.0;
contract C {
@@ -545,9 +547,11 @@ Please ensure you test your fallback function thoroughly to ensure the execution
test.call(0xabcdef01); // hash does not exist
// results in test.x becoming == 1.
// The following call will fail, reject the
// Ether and return false:
test.send(2 ether);
// The following will not compile, but even
// if someone sends ether to that contract,
// the transaction will fail and reject the
// Ether.
//test.send(2 ether);
}
}
@@ -773,13 +777,17 @@ seen in the following example::
pragma solidity ^0.4.0;
contract owned {
function owned() { owner = msg.sender; }
address owner;
}
contract mortal is owned {
function kill() {
if (msg.sender == owner) selfdestruct(owner);
}
}
contract Base1 is mortal {
function kill() { /* do cleanup 1 */ mortal.kill(); }
}
@@ -800,6 +808,11 @@ derived override, but this function will bypass
pragma solidity ^0.4.0;
contract owned {
function owned() { owner = msg.sender; }
address owner;
}
contract mortal is owned {
function kill() {
if (msg.sender == owner) selfdestruct(owner);
@@ -879,6 +892,8 @@ error "Linearization of inheritance graph impossible".
::
// This will not compile
pragma solidity ^0.4.0;
contract X {}
@@ -914,10 +929,16 @@ Contract functions can lack an implementation as in the following example (note
function utterance() returns (bytes32);
}
Such contracts cannot be compiled (even if they contain implemented functions alongside non-implemented functions), but they can be used as base contracts::
Such contracts cannot be compiled (even if they contain
implemented functions alongside non-implemented functions),
but they can be used as base contracts::
pragma solidity ^0.4.0;
contract Feline {
function utterance() returns (bytes32);
}
contract Cat is Feline {
function utterance() returns (bytes32) { return "miaow"; }
}