diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/contracts.rst | 14 | ||||
| -rw-r--r-- | docs/units-and-global-variables.rst | 7 |
2 files changed, 16 insertions, 5 deletions
diff --git a/docs/contracts.rst b/docs/contracts.rst index f8a44fb3..0dd9845c 100644 --- a/docs/contracts.rst +++ b/docs/contracts.rst @@ -1034,9 +1034,12 @@ the base constructors. This can be done in two ways:: constructor(uint _x) public { x = _x; } } - contract Derived is Base(7) { - constructor(uint _y) Base(_y * _y) public { - } + contract Derived1 is Base(7) { + constructor(uint _y) public {} + } + + contract Derived2 is Base { + constructor(uint _y) Base(_y * _y) public {} } One way is directly in the inheritance list (``is Base(7)``). The other is in @@ -1046,8 +1049,9 @@ do it is more convenient if the constructor argument is a constant and defines the behaviour of the contract or describes it. The second way has to be used if the constructor arguments of the base depend on those of the -derived contract. If, as in this silly example, both places -are used, the modifier-style argument takes precedence. +derived contract. Arguments have to be given either in the +inheritance list or in modifier-style in the derived constuctor. +Specifying arguments in both places is an error. .. index:: ! inheritance;multiple, ! linearization, ! C3 linearization diff --git a/docs/units-and-global-variables.rst b/docs/units-and-global-variables.rst index 2571f20a..e7f41ed1 100644 --- a/docs/units-and-global-variables.rst +++ b/docs/units-and-global-variables.rst @@ -169,6 +169,13 @@ For more information, see the section on :ref:`address`. Use a pattern where the recipient withdraws the money. .. note:: + If storage variables are accessed via a low-level delegatecall, the storage layout of the two contracts + must align in order for the called contract to correctly access the storage variables of the calling contract by name. + This is of course not the case if storage pointers are passed as function arguments as in the case for + the high-level libraries. + + +.. note:: The use of ``callcode`` is discouraged and will be removed in the future. .. index:: this, selfdestruct |