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Merge pull request #11225 from ethereum/index-safe-math

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Added index for safemath in docs
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chriseth 2021-04-08 17:51:49 +02:00 committed by GitHub
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docs/control-structures.rst
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@ -478,6 +478,7 @@ In any case, you will get a warning about the outer variable being shadowed.
}
.. index:: ! safe math, safemath, checked, unchecked
.. _unchecked:
Checked or Unchecked Arithmetic
@ -501,11 +502,11 @@ To obtain the previous behaviour, an ``unchecked`` block can be used:
pragma solidity ^0.8.0;
contract C {
function f(uint a, uint b) pure public returns (uint) {
// This addition will wrap on underflow.
// This subtraction will wrap on underflow.
unchecked { return a - b; }
}
function g(uint a, uint b) pure public returns (uint) {
// This addition will revert on underflow.
// This subtraction will revert on underflow.
return a - b;
}
}