# std::latch::latch

From cppreference.com
< cpp‎ | thread‎ | latch

constexpr explicit latch( std::ptrdiff_t expected ); | (1) | (since C++20)
latch( const latch & ) = delete; | (2) | (since C++20)

1) Constructs a `latch` and initializes its internal counter. The behavior is undefined if `expected` is negative or greater than max().
2) Copy constructor is deleted. `latch` is neither copyable nor movable.

### Parameters

expected | - | the initial value of the internal counter

### Exceptions

Throws nothing.

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