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Diffstat (limited to 'docs/contracts.rst')
| -rw-r--r-- | docs/contracts.rst | 38 |
1 files changed, 1 insertions, 37 deletions
diff --git a/docs/contracts.rst b/docs/contracts.rst index 7f7d821a..2a397f6d 100644 --- a/docs/contracts.rst +++ b/docs/contracts.rst @@ -534,43 +534,7 @@ converted to ``uint8``. .. include:: contracts/inheritance.rst .. include:: contracts/abstract-contracts.rst - -.. index:: ! contract;interface, ! interface contract - -.. _interfaces: - -********** -Interfaces -********** - -Interfaces are similar to abstract contracts, but they cannot have any functions implemented. There are further restrictions: - -- They cannot inherit other contracts or interfaces. -- All declared functions must be external. -- They cannot declare a constructor. -- They cannot declare state variables. - -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: - -:: - - pragma solidity ^0.5.0; - - interface Token { - enum TokenType { Fungible, NonFungible } - struct Coin { string obverse; string reverse; } - function transfer(address recipient, uint amount) external; - } - -Contracts can inherit interfaces as they would inherit other contracts. - -Types defined inside interfaces and other contract-like structures -can be accessed from other contracts: ``Token.TokenType`` or ``Token.Coin``. +.. include:: contracts/interfaces.rst .. index:: ! library, callcode, delegatecall |