Function parseObjectMethod

packages/babel-parser/src/parser/expression.ts:2163–2202

(
    this: Parser,
    prop: Undone<N.ObjectMethod>,
    isGenerator: boolean,
    isAsync: boolean,
    isPattern: boolean,
    isAccessor: boolean,
  )

  // https://tc39.es/ecma262/#prod-MethodDefinition
  parseObjectMethod(
    this: Parser,
    prop: Undone<N.ObjectMethod>,
    isGenerator: boolean,
    isAsync: boolean,
    isPattern: boolean,
    isAccessor: boolean,
  ): N.ObjectMethod | undefined | null {
    if (isAccessor) {
      // isAccessor implies isAsync: false, isPattern: false, isGenerator: false
      const finishedProp = this.parseMethod(
        prop,
        // This _should_ be false, but with error recovery, we allow it to be
        // set for informational purposes
        isGenerator,
        /* isAsync */ false,
        /* isConstructor */ false,
        false,
        "ObjectMethod",
      );
      this.checkGetterSetterParams(finishedProp);
      return finishedProp;
    }

    if (isAsync || isGenerator || this.match(tt.parenL)) {
      if (isPattern) this.unexpected();
      prop.kind = "method";
      // @ts-expect-error todo: Undocumented property for ESTree compatibility.
      // Consider move to the ESTree plugin
      prop.method = true;
      return this.parseMethod(
        prop,
        isGenerator,
        isAsync,
        /* isConstructor */ false,
        false,
        "ObjectMethod",
      );
    }
  }

  // if `isPattern` is true, parse https://tc39.es/ecma262/#prod-BindingProperty
  // else https://tc39.es/ecma262/#prod-PropertyDefinition