cerc-io/solidity
16
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge pull request #9847 from ethereum/extocdesizecheck

Browse Source 
[DOC] Add note about extcodesize check.
This commit is contained in:
chriseth 2020-09-21 16:28:59 +02:00 committed by GitHub
commit 5733927dde
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
docs/control-structures.rst
View File

@ -105,8 +105,12 @@ otherwise, the ``value`` option would not be available.
parentheses at the end perform the actual call. So in this case, the
function is not called and the ``value`` and ``gas`` settings are lost.
Function calls cause exceptions if the called contract does not exist (in the
sense that the account does not contain code) or if the called contract itself
Due to the fact that the EVM considers a call to a non-existing contract to
always succeed, Solidity uses the ``extcodesize`` opcode to check that
the contract that is about to be called actually exists (it contains code)
and causes an exception if it does not.
Function calls also cause exceptions if the called contract itself
throws an exception or goes out of gas.
.. warning::