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std::ws

From cppreference.com
< cpp‎ | io‎ | manip
 
C++
 
Input/output library
 
Input/output manipulators
Floating-point formatting
Integer formatting
Boolean formatting
Field width and fill control
Other formatting
Whitespace processing
ws
Output flushing
(C++20)  

Status flags manipulation
Time and money I/O
(C++11)
(C++11)
(C++11)
(C++11)
Quoted manipulator
(C++14)
 
Defined in header <istream>
template< class CharT, class Traits >
std::basic_istream<CharT, Traits>& ws( std::basic_istream<CharT, Traits>& is );

Discards leading whitespace from an input stream.

Behaves as an