import { CaretInfixParselet, CharToken, TokensTag } from "@caret-js/core";
import { CaretNode, CaretParser } from "@caret-js/core";
import { AddNode } from "../nodes/add";

export class AddParselet extends CaretInfixParselet {
  public readonly associativity = "left";

  parse(parser: CaretParser, left: CaretNode): AddNode {
    const token = parser.consume();
    this.assert(
      token instanceof CharToken && token.char === "+",
      "Expected '+' token"
    );

    const right = parser.parseMinBP(this);
    return AddNode.from([left, right]).addTag(new TokensTag([token]));
  }
}