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| author | Alex Beregszaszi <alex@rtfs.hu> | 2017-02-12 23:21:32 +0800 |
|---|---|---|
| committer | Alex Beregszaszi <alex@rtfs.hu> | 2017-03-18 01:06:51 +0800 |
| commit | 3f1468142badd2717596a4cd78f6f347b78010d7 (patch) | |
| tree | 67c7fc5daa24a7ff803e7a1b99088694f63de2a2 /docs/contracts.rst | |
| parent | cfab70fd89e98f9301838682b28b9e400e1b2632 (diff) | |
| download | dexon-solidity-3f1468142badd2717596a4cd78f6f347b78010d7.tar.gz dexon-solidity-3f1468142badd2717596a4cd78f6f347b78010d7.tar.zst dexon-solidity-3f1468142badd2717596a4cd78f6f347b78010d7.zip | |
Document interfaces
Diffstat (limited to 'docs/contracts.rst')
| -rw-r--r-- | docs/contracts.rst | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/docs/contracts.rst b/docs/contracts.rst index 2ee04675..33627b92 100644 --- a/docs/contracts.rst +++ b/docs/contracts.rst @@ -922,6 +922,33 @@ Such contracts cannot be compiled (even if they contain implemented functions al If a contract inherits from an abstract contract and does not implement all non-implemented functions by overriding, it will itself be abstract. +.. index:: ! contract;interface, ! interface contract + +********** +Interfaces +********** + +Interfaces are similar to abstract contracts, but they cannot have any functions implemented. There are further restrictions: + +#. Cannot inherit other contracts or interfaces. +#. Cannot define variables. +#. Cannot define structs. + +Some of these restrictions might be lifted in the future. + +Interfaces are basically limited to what the Contract ABI can represent and the conversion between the ABI and +an Interface should be possible without any information loss. + +Interfaces are denoted by their own keyword: + +:: + + interface Token { + function transfer(address recipient, uint amount); + } + +Contracts can inherit interfaces as they would inherit other contracts. + .. index:: ! library, callcode, delegatecall .. _libraries: |