import { i as initRange } from "./init-cc95ec8e.js";
class InternMap extends Map {
  constructor(entries, key = keyof) {
    super();
    Object.defineProperties(this, { _intern: { value: /* @__PURE__ */ new Map() }, _key: { value: key } });
    if (entries != null)
      for (const [key2, value] of entries)
        this.set(key2, value);
  }
  get(key) {
    return super.get(intern_get(this, key));
  }
  has(key) {
    return super.has(intern_get(this, key));
  }
  set(key, value) {
    return super.set(intern_set(this, key), value);
  }
  delete(key) {
    return super.delete(intern_delete(this, key));
  }
}
function intern_get({ _intern, _key }, value) {
  const key = _key(value);
  return _intern.has(key) ? _intern.get(key) : value;
}
function intern_set({ _intern, _key }, value) {
  const key = _key(value);
  if (_intern.has(key))
    return _intern.get(key);
  _intern.set(key, value);
  return value;
}
function intern_delete({ _intern, _key }, value) {
  const key = _key(value);
  if (_intern.has(key)) {
    value = _intern.get(key);
    _intern.delete(key);
  }
  return value;
}
function keyof(value) {
  return value !== null && typeof value === "object" ? value.valueOf() : value;
}
const implicit = Symbol("implicit");
function ordinal() {
  var index = new InternMap(), domain = [], range = [], unknown = implicit;
  function scale(d) {
    let i = index.get(d);
    if (i === void 0) {
      if (unknown !== implicit)
        return unknown;
      index.set(d, i = domain.push(d) - 1);
    }
    return range[i % range.length];
  }
  scale.domain = function(_) {
    if (!arguments.length)
      return domain.slice();
    domain = [], index = new InternMap();
    for (const value of _) {
      if (index.has(value))
        continue;
      index.set(value, domain.push(value) - 1);
    }
    return scale;
  };
  scale.range = function(_) {
    return arguments.length ? (range = Array.from(_), scale) : range.slice();
  };
  scale.unknown = function(_) {
    return arguments.length ? (unknown = _, scale) : unknown;
  };
  scale.copy = function() {
    return ordinal(domain, range).unknown(unknown);
  };
  initRange.apply(scale, arguments);
  return scale;
}
export {
  ordinal as o
};
