array::try_at
Access an element, with bounds checking.
Synopsis
boost::system::result< value & >
try_at(
std::size_t pos) noexcept; (1)
boost::system::result< value const & >
try_at(
std::size_t pos) const noexcept; (2)Description
Returns boost::system::result containing a reference to the element specified at location pos, if pos is within the range of the container. Otherwise the result contains an error_code.
Exception Safety
No-throw guarantee.
Parameters
| Name | Description |
|---|---|
|
A zero-based index. |
Complexity
Constant.