Function RANGES_FOR

example/performance.cpp:19–25

        auto block = chain[height];
        int64_t total = 0;
        RANGES_FOR(auto tx, block) {
            RANGES_FOR(auto output, tx.outputs()) {
                if (!output.isSpent()) {
                    total += output.getValue();
                }
            }
        }
        sums.push_back(total);
    }
    return sums;