scope/main.cpp at main · nth-eye/scope · GitHub

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#include <nth/scope.h>
#include <cstdio>

int main()
{
    int i = 42;

    nth::scope_exit_t on_exit_1 = [&] {
        printf("on_exit_1: %d\n", i);
    };
    nth::scope_exit_t on_exit_2 = [] {
        printf("on_exit_2\n");
    };
    nth::scope_fuse_t on_exit_3 = [] {
        printf("on_exit_3\n");
    };
    nth::scope_fuse_t on_exit_4 = [] {
        printf("on_exit_4\n");
    };

    on_exit_3.invoke(); // invoke before scope exit
    // on_exit_3
    on_exit_3.invoke(); // no-op
    on_exit_3.defuse(); // no-op

    on_exit_4.defuse(); // cancel before scope exit

    // ~on_exit_4 won't be invoked
    // ~on_exit_3 won't be invoked

    // on_exit_2
    // on_exit_1: 42
}