Method process

test/anyflow/test_processor.cpp:469–476

TEST_F(ProcessorTest, depend_essential) {
  struct F : public GraphProcessor {
    virtual int process() noexcept override {
      if (a) {
        *x.emit() = 1;
      } else {
        *x.emit() = 0;
      }
      return 0;
    }
    ANYFLOW_INTERFACE(ANYFLOW_DEPEND_DATA(int, a, 0) // essential = 0
                      ANYFLOW_EMIT_DATA(int, x))
  };