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authorLeonardo Alt <leo@ethereum.org>2018-07-05 20:32:32 +0800
committerLeonardo Alt <leo@ethereum.org>2018-07-12 18:53:49 +0800
commit3ebfcae8292da1d9f41ff20da1866c424404ee58 (patch)
tree0b6845c1598d81ed72ebe2b2d44272f6f51f284c /docs/contracts.rst
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Update external tests and docs
Diffstat (limited to 'docs/contracts.rst')
-rw-r--r--docs/contracts.rst17
1 files changed, 8 insertions, 9 deletions
diff --git a/docs/contracts.rst b/docs/contracts.rst
index a745bea8..e3dd04be 100644
--- a/docs/contracts.rst
+++ b/docs/contracts.rst
@@ -406,7 +406,7 @@ Constant State Variables
State variables can be declared as ``constant``. In this case, they have to be
assigned from an expression which is a constant at compile time. Any expression
-that accesses storage, blockchain data (e.g. ``now``, ``this.balance`` or
+that accesses storage, blockchain data (e.g. ``now``, ``address(this).balance`` or
``block.number``) or
execution data (``msg.value`` or ``gasleft()``) or make calls to external contracts are disallowed. Expressions
that might have a side-effect on memory allocation are allowed, but those that
@@ -497,7 +497,7 @@ Functions can be declared ``pure`` in which case they promise not to read from o
In addition to the list of state modifying statements explained above, the following are considered reading from the state:
#. Reading from state variables.
-#. Accessing ``this.balance`` or ``<address>.balance``.
+#. Accessing ``address(this).balance`` or ``<address>.balance``.
#. Accessing any of the members of ``block``, ``tx``, ``msg`` (with the exception of ``msg.sig`` and ``msg.data``).
#. Calling any function not marked ``pure``.
#. Using inline assembly that contains certain opcodes.
@@ -571,7 +571,7 @@ Like any function, the fallback function can execute complex operations as long
but do not define a fallback function
throw an exception, sending back the Ether (this was different
before Solidity v0.4.0). So if you want your contract to receive Ether,
- you have to implement a fallback function.
+ you have to implement a payable fallback function.
.. warning::
A contract without a payable fallback function can receive Ether as a recipient of a `coinbase transaction` (aka `miner block reward`)
@@ -579,11 +579,11 @@ Like any function, the fallback function can execute complex operations as long
A contract cannot react to such Ether transfers and thus also cannot reject them. This is a design choice of the EVM and Solidity cannot work around it.
- It also means that ``this.balance`` can be higher than the sum of some manual accounting implemented in a contract (i.e. having a counter updated in the fallback function).
+ It also means that ``address(this).balance`` can be higher than the sum of some manual accounting implemented in a contract (i.e. having a counter updated in the fallback function).
::
- pragma solidity ^0.4.0;
+ pragma solidity >0.4.24;
contract Test {
// This function is called for all messages sent to
@@ -604,14 +604,13 @@ Like any function, the fallback function can execute complex operations as long
contract Caller {
function callTest(Test test) public {
- test.call(abi.encodeWithSignature("nonExistingFunction()"));
+ address(test).call(abi.encodeWithSignature("nonExistingFunction()"));
// results in test.x becoming == 1.
- // The following will not compile, but even
- // if someone sends ether to that contract,
+ // If someone sends ether to that contract,
// the transaction will fail and reject the
// Ether.
- //test.send(2 ether);
+ address(test).send(2 ether);
}
}