Language
C++
Compiler
gcc 12.3.0
Options
Warnings
Boost 1.81.0
C++11(GNU)
no pedantic
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.81.0-gcc-12.3.0/include -std=gnu++11 Before assignment
use_count = 0
expired() = true
After assignment
use_count = 1
expired() = false
After lock
*sp = 20
use_count = 2
expired() = false
After reset
use_count = 0
expired() = true
owner_before() demo
*x = 20
*w2.lock() = 10
x < y = true
w2.owner_before(x) = false
Exit Code:
0