import std.stdio;

import core.sys.posix.setjmp;

enum JumpTarget {normal = 0, GOTO_LABEL_EXTRA1, GOTO_LABEL_EXTRA2}

jmp_buf backToMain;

​

void main()

{    

    int res = setjmp(backToMain);

    with (JumpTarget) final switch (res) {

        case normal:

            someFunction1();

            break;

        case GOTO_LABEL_EXTRA1:

            writeln("extra 1"); 

            break;

        case GOTO_LABEL_EXTRA2:

            writeln("extra 2");

            break;

    }   

}

​

void someFunction1() {

    someFunction2();

    assert(0); // uh oh, someFunction2 better not return

}

​

void someFunction2() {

    longjmp(backToMain, JumpTarget.GOTO_LABEL_EXTRA2);

    assert(0);

}

​