@bablr/language-en-es6/lib/mixins/function.js

A BABLR language for ES6 (JavaScript)

/* @macrome
 * @generatedby @bablr/macrome-generator-bablr
 * @generatedfrom ./function.macro.js#131fa920ecc7aa38c83fd989fbfe47e749a55217
 * This file is autogenerated. Please do not edit it directly.
 * When editing run `npx macrome watch` then change the file this is generated from.
 */
import _applyDecs from "@babel/runtime/helpers/applyDecs2305";
import { spam as m, re } from '@bablr/boot';
import { CoveredBy, Node } from '@bablr/helpers/decorators';
import { o, eat, eatMatch, fail, match, shiftMatch } from '@bablr/helpers/grammar';
export const mixin = Base => {
  let _initProto, _FunctionExpressionDecs;
  return class es6FunctionGrammar extends Base {
    static {
      [_initProto] = _applyDecs(this, [[_FunctionExpressionDecs, 2, "FunctionExpression"], [Node, 2, "YieldStatement"], [Node, 2, "ObjectPattern"], [Node, 2, "PropertyPattern"], [Node, 2, "AssignmentPattern"], [Node, 2, "ArrayPattern"], [Node, 2, "ArrowFunctionExpression"]], [], 0, void 0, Base).e;
    }
    constructor(...args) {
      super(...args);
      _initProto(this);
    }
    *[(_FunctionExpressionDecs = [CoveredBy('Expression'), Node], "FunctionExpression")]({
      props: {
        shorthand
      }
    }) {
      if (!shorthand) {
        yield eat(m`sigilToken: <*Keyword 'function' />`);
      } else {
        yield eat(m`sigilToken: null`);
      }
      let a = yield eatMatch(m`asyncToken: <*Keyword 'async' />`);
      let gen = yield eatMatch(m`starToken: <*Punctuator '*' />`);
      if (a && gen) yield fail();
      if (!shorthand) {
        yield eatMatch(m`id: <Identifier />`, o({}), o({
          bind: true
        }));
      } else {
        yield eat(m`id: null`);
      }
      yield eat(m`openParamsToken: <*Punctuator '(' { balanced: ')' } />`);
      yield eat(m`params[]+: <__List />`, o({
        element: m`<_CapturePattern />`,
        allowTrailingSeparator: false,
        separator: m`#separatorTokens[]: <*Punctuator ',' />`
      }));
      yield eat(m`closeParamsToken: <*Punctuator ')' { balancer: true } />`);
      yield eat(m`body: <BlockStatement />`);
    }
    *YieldStatement() {
      yield eat(m`sigilToken: <*Keyword 'yield' />`);
      yield eat(m`expression+$: <_Expression />`);
      yield eatMatch(m`endToken: <*Punctuator ';' />`, null, o({
        bind: true
      }));
    }

    // (type = null, { prop, value: name = {} }) => {};

    *CapturePattern({
      ctx
    }) {
      let pn;
      if (pn = yield match(re`/[[{]/`)) {
        switch (ctx.sourceTextFor(pn).trim()) {
          case '{':
            yield eat(m`<ObjectPattern />`);
            break;
          case '[':
            yield eat(m`<ArrayPattern />`);
            break;
        }
      } else {
        yield eat(m`<Identifier />`);
        return shiftMatch(m`<AssignmentPattern '=' />`);
      }
    }
    *ObjectPattern() {
      yield eat(m`openToken: <*Punctuator '{' { balanced: '}' } />`);
      yield eat(m`params[]+$: <__List />`, o({
        element: m`<PropertyPattern />`,
        allowTrailingSeparator: true,
        separator: m`#separatorTokens[]: <*Punctuator ',' />`
      }));
      yield eat(m`closeToken: <*Punctuator '}' { balancer: true } />`);
    }
    *PropertyPattern() {
      if (yield eatMatch(m`key$: <Identifier />`)) {
        let cn = yield eatMatch(m`mapOperator: <*Punctuator ':' />`, null, o({
          bind: true
        }));
        if (cn) {
          yield eat(m`value+$: <_CapturePattern />`);
        }
      } else {
        yield eat(m`key$: <Identifier />`, o({
          scoped: false
        }));
        yield eat(m`mapOperator: <*Punctuator ':' />`);
        yield eat(m`value+$: <_CapturePattern />`);
      }
    }
    *AssignmentPattern() {
      yield eat(m`source+$: <Identifier />`);
      yield eat(m`assignmentOperator: <*Punctuator '=' />`);
      yield eat(m`defaultValue+$: <_Expression />`, o({
        power: 32
      }));
    }
    *ArrayPattern() {
      yield eat(m`openToken: <*Punctuator '[' { balanced: ']' } />`);
      yield eat(m`params[]+$: <__List />`, o({
        element: m`<_CapturePattern />`,
        allowTrailingSeparator: true,
        separator: m`#separatorTokens[]: <*Punctuator ',' />`
      }));
      yield eat(m`closeToken: <*Punctuator ']' { balancer: true } />`);
    }
    *ArrowFunctionExpression() {
      // yield eat(m`params[]+: []`);
      if (yield match('(')) {
        yield eat(m`openParamsToken: <*Punctuator '(' { balanced: ')' } />`);
        yield eat(m`params[]+$: <__List />`, o({
          element: m`<_CapturePattern />`,
          allowTrailingSeparator: false,
          separator: m`#separatorTokens[]: <*Punctuator ',' />`
        }));
        yield eat(m`closeParamsToken: <*Punctuator ')' { balancer: true } />`);
      } else {
        yield eat(m`params[]+$: <Identifier />`);
        yield eat(m`openParamsToken: null`);
        yield eat(m`closeParamsToken: null`);
      }
      yield eat(m`sigilToken: <*Keyword '=>' />`);
      if (yield match('{')) {
        yield eat(m`body+$: <BlockStatement />`);
      } else {
        yield eat(m`body+$: <_Expression />`);
      }
    }
  };
};