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Updated docs for type(X).min and type(X).max

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Harikrishnan Mulackal 2020-05-11 16:19:55 +05:30
parent e4e200f29f
commit 091abcea8c
3 changed files with 17 additions and 4 deletions
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2
docs/cheatsheet.rst
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@ -122,6 +122,8 @@ Global Variables
- ``type(C).creationCode`` (``bytes memory``): creation bytecode of the given contract, see :ref:`Type Information<meta-type>`. - ``type(C).creationCode`` (``bytes memory``): creation bytecode of the given contract, see :ref:`Type Information<meta-type>`.
- ``type(C).runtimeCode`` (``bytes memory``): runtime bytecode of the given contract, see :ref:`Type Information<meta-type>`. - ``type(C).runtimeCode`` (``bytes memory``): runtime bytecode of the given contract, see :ref:`Type Information<meta-type>`.
- ``type(I).interfaceId`` (``bytes4``): value containing the EIP-165 interface identifier of the given interface, see :ref:`Type Information<meta-type>`. - ``type(I).interfaceId`` (``bytes4``): value containing the EIP-165 interface identifier of the given interface, see :ref:`Type Information<meta-type>`.
- ``type(X).min`` (``X``): the minimum value representable by the integer type ``X``, see :ref:`Type Information<meta-type>`.
- ``type(X).max`` (``X``): the maximum value representable by the integer type ``X``, see :ref:`Type Information<meta-type>`.
.. note:: .. note::
Do not rely on ``block.timestamp``, ``now`` and ``blockhash`` as a source of randomness, Do not rely on ``block.timestamp``, ``now`` and ``blockhash`` as a source of randomness,

3
docs/types/value-types.rst
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@ -40,6 +40,9 @@ Operators:
* Shift operators: ``<<`` (left shift), ``>>`` (right shift) * Shift operators: ``<<`` (left shift), ``>>`` (right shift)
* Arithmetic operators: ``+``, ``-``, unary ``-``, ``*``, ``/``, ``%`` (modulo), ``**`` (exponentiation) * Arithmetic operators: ``+``, ``-``, unary ``-``, ``*``, ``/``, ``%`` (modulo), ``**`` (exponentiation)
For an integer type ``X``, you can use ``type(X).min`` and ``type(X).max`` to
access the minimum and maximum value representable by the type.
.. warning:: .. warning::
Integers in Solidity are restricted to a certain range. For example, with ``uint32``, this is ``0`` up to ``2**32 - 1``. Integers in Solidity are restricted to a certain range. For example, with ``uint32``, this is ``0`` up to ``2**32 - 1``.

16
docs/units-and-global-variables.rst
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@ -294,10 +294,11 @@ Furthermore, all functions of the current contract are callable directly includi
Type Information Type Information
---------------- ----------------
The expression ``type(X)`` can be used to retrieve information about the The expression ``type(X)`` can be used to retrieve information about the type
type ``X``. Currently, there is limited support for this feature, but ``X``. Currently, there is limited support for this feature (``X`` can be either
it might be expanded in the future. The following properties are a contract or an integer type) but it might be expanded in the future.
available for a contract type ``C``:
The following properties are available for a contract type ``C``:
``type(C).name`` ``type(C).name``
The name of the contract. The name of the contract.
@ -328,3 +329,10 @@ for an interface type ``I``:
interface identifier of the given interface ``I``. This identifier is defined as the ``XOR`` of all interface identifier of the given interface ``I``. This identifier is defined as the ``XOR`` of all
function selectors defined within the interface itself - excluding all inherited functions. function selectors defined within the interface itself - excluding all inherited functions.
The following properties are available for an integer type ``I``:
``type(I).min``
The smallest value representable by type ``I``.
``type(I).max``
The largest value representable by type ``I``.