Function relation

ServerEditorWeb/ace/worker-javascript.js:3374–3404

(s, f)

  }

  function relation(s, f) {
    var x = symbol(s, 100);

    x.led = function (left) {
      nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
      var right = expression(100);

      if (isIdentifier(left, "NaN") || isIdentifier(right, "NaN")) {
        warning("W019", this);
      } else if (f) {
        f.apply(this, [left, right]);
      }

      if (!left || !right) {
        quit("E041", state.tokens.curr.line);
      }

      if (left.id === "!") {
        warning("W018", left, "!");
      }

      if (right.id === "!") {
        warning("W018", right, "!");
      }

      this.left = left;
      this.right = right;
      return this;
    };
    return x;
  }

  function isPoorRelation(node) {
    return node &&