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| author | chriseth <chris@ethereum.org> | 2018-10-10 21:21:40 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-10-10 21:21:40 +0800 |
| commit | 4035c96a32897d91da877dfb84e78e11e12b1e30 (patch) | |
| tree | 60a4ed632784ebc9f9f7abd8fd419f6c3a873a88 /docs | |
| parent | 06200b4b64c911ea2e0b12076e0fa02093dacbf8 (diff) | |
| parent | 8a15058a217b6765aa5a5085b328edcb84694927 (diff) | |
| download | dexon-solidity-4035c96a32897d91da877dfb84e78e11e12b1e30.tar.gz dexon-solidity-4035c96a32897d91da877dfb84e78e11e12b1e30.tar.zst dexon-solidity-4035c96a32897d91da877dfb84e78e11e12b1e30.zip | |
Merge pull request #5184 from ethereum/viewFunctionDocs
Library view functions
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/contracts.rst | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/docs/contracts.rst b/docs/contracts.rst index faef3fc2..0d1b029b 100644 --- a/docs/contracts.rst +++ b/docs/contracts.rst @@ -485,7 +485,11 @@ Functions can be declared ``view`` in which case they promise not to modify the .. note:: If the compiler's EVM target is Byzantium or newer (default) the opcode ``STATICCALL`` is used for ``view`` functions which enforces the state - to stay unmodified as part of the EVM execution. + to stay unmodified as part of the EVM execution. For library ``view`` functions + ``DELEGATECALL`` is used, because there is no combined ``DELEGATECALL`` and ``STATICCALL``. + This means library ``view`` functions do not have run-time checks that prevent state + modifications. This should not impact security negatively because library code is + usually known at compile-time and the static checker performs compile-time checks. The following statements are considered modifying the state: |