Method add_output

src/instruction.cpp:214–218

bool operator!=(instruction_ref ref, const instruction& i) { return not(i == ref); }

void instruction::add_output(instruction_ref ins)
{
    if(std::find_if(output.begin(), output.end(), equal_to(ins)) == output.end())
        output.push_back(ins);
}

void instruction::backreference(instruction_ref ref)
{