jiaojiu/node_modules/@babel/generator/lib/generators/methods.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports._params = _params;
exports._parameters = _parameters;
exports._param = _param;
exports._methodHead = _methodHead;
exports._predicate = _predicate;
exports._functionHead = _functionHead;
exports.FunctionDeclaration = exports.FunctionExpression = FunctionExpression;
exports.ArrowFunctionExpression = ArrowFunctionExpression;

var t = _interopRequireWildcard(require("@babel/types"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _params(node) {
  this.print(node.typeParameters, node);
  this.token("(");

  this._parameters(node.params, node);

  this.token(")");
  this.print(node.returnType, node);
}

function _parameters(parameters, parent) {
  for (let i = 0; i < parameters.length; i++) {
    this._param(parameters[i], parent);

    if (i < parameters.length - 1) {
      this.token(",");
      this.space();
    }
  }
}

function _param(parameter, parent) {
  this.printJoin(parameter.decorators, parameter);
  this.print(parameter, parent);
  if (parameter.optional) this.token("?");
  this.print(parameter.typeAnnotation, parameter);
}

function _methodHead(node) {
  const kind = node.kind;
  const key = node.key;

  if (kind === "get" || kind === "set") {
    this.word(kind);
    this.space();
  }

  if (node.async) {
    this._catchUp("start", key.loc);

    this.word("async");
    this.space();
  }

  if (kind === "method" || kind === "init") {
    if (node.generator) {
      this.token("*");
    }
  }

  if (node.computed) {
    this.token("[");
    this.print(key, node);
    this.token("]");
  } else {
    this.print(key, node);
  }

  if (node.optional) {
    this.token("?");
  }

  this._params(node);
}

function _predicate(node) {
  if (node.predicate) {
    if (!node.returnType) {
      this.token(":");
    }

    this.space();
    this.print(node.predicate, node);
  }
}

function _functionHead(node) {
  if (node.async) {
    this.word("async");
    this.space();
  }

  this.word("function");
  if (node.generator) this.token("*");
  this.space();

  if (node.id) {
    this.print(node.id, node);
  }

  this._params(node);

  this._predicate(node);
}

function FunctionExpression(node) {
  this._functionHead(node);

  this.space();
  this.print(node.body, node);
}

function ArrowFunctionExpression(node) {
  if (node.async) {
    this.word("async");
    this.space();
  }

  const firstParam = node.params[0];

  if (node.params.length === 1 && t.isIdentifier(firstParam) && !hasTypes(node, firstParam)) {
    if ((this.format.retainLines || node.async) && node.loc && node.body.loc && node.loc.start.line < node.body.loc.start.line) {
      this.token("(");

      if (firstParam.loc && firstParam.loc.start.line > node.loc.start.line) {
        this.indent();
        this.print(firstParam, node);
        this.dedent();

        this._catchUp("start", node.body.loc);
      } else {
        this.print(firstParam, node);
      }

      this.token(")");
    } else {
      this.print(firstParam, node);
    }
  } else {
    this._params(node);
  }

  this._predicate(node);

  this.space();
  this.token("=>");
  this.space();
  this.print(node.body, node);
}

function hasTypes(node, param) {
  return node.typeParameters || node.returnType || param.typeAnnotation || param.optional || param.trailingComments;
}