05b22d2597
This commit introduces 4 changes:
1) Function declarations are wrapped using function declarations.
This has two advantages:
- We can rely on native hoisting, instead of using _blockHoist
- The function isn't wrapped until it is called. This avoids
problems where `regeneratorRuntime.wrap` was called before
that `babel-polyfill` was imported.
Example:
function fn() {}
// becomes
function fn() { return _fn.apply(this, arguments); }
function _fn() {
_fn = _wrapper(/* Original function ... */);
return _fn.apply(this, arguments);
}
2) Use a single template for both named and anonymous function
expressions. They already had the same behavior, but the one
used for named functions was a bit longer.
3) Use normal functions instead of arrow functions to wrap
function expressions.
4) Generate a name based on the original one for wrapped
functions (e.g. `foo` becomes `_foo` instead of `_ref`).
22 lines
902 B
JavaScript
22 lines
902 B
JavaScript
"use strict";
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function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } } function _next(value) { step("next", value); } function _throw(err) { step("throw", err); } _next(); }); }; }
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function mandatory(paramName) {
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throw new Error(`Missing parameter: ${paramName}`);
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}
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function foo(_x) {
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return _foo.apply(this, arguments);
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}
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function _foo() {
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_foo = _asyncToGenerator(function* (_ref) {
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let a = _ref.a,
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_ref$b = _ref.b,
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b = _ref$b === void 0 ? mandatory("b") : _ref$b;
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return Promise.resolve(b);
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});
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return _foo.apply(this, arguments);
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}
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