Boost C++ Libraries

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Function template io

boost::pfr::io

Synopsis

// In header: <boost/pfr/io.hpp>


template<typename T> auto io(T && value);

Description

IO manipulator to read/write simple aggregate value using its IO stream operators or using boost::pfr::io_fields if operators are not available.

Example:

struct my_struct { int i; short s; };
my_struct x;
std::stringstream ss;
ss << "{ 12, 13 }";
ss >> boost::pfr::io(x);
assert(x.i == 12);
assert(x.s == 13);

See Also : 'Custom printing of aggregates' for info on how to implement your own manipulator with custom format.