Column names

[mwhittaker]

Added column names to Fluent. Now, creating a fluent program looks like this.

auto f = fluent<NoopClient>("name", "tcp://0.0.0.0:8000", &context, conn)
  .table<int, char, float>("t1", {{"x", "y", "z"}})
  .table<float, int>("t2" {{"x", "y"}})
  .scratch<int, int, float>("s", {{"x", "y"}})
  .channel<std::string, float, char>("c", {{"addr", "x", "y"}})
  .RegisterBootstrapRules([&](auto& t1, auto& t2, auto& s, auto& c) {
    return std::make_tuple(t1 <= ra::make_iterable("ts", &ts));
  })
  .RegisterRules([](auto& t1, auto& t2, auto& s, auto& c) {
    return std::make_tuple(t2 <= t1.iterable | ra::project<2, 0>());
  });

Column names are put in the lineage database and are used by the frontend. If you provide an incorrect number of channel names, the code won't compile. That's nice :)

[cw75]

Currently, is the column name only for querying lineage? Can we also do things like "ra::project<"z", "x">"?

[mwhittaker]

Only lineage.