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spawnGenerator.js
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spawnGenerator.js
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'use strict';
let spawnGenerator = function (generatorFunction) {
let fn = function () {
// passed function is not generator, call it directly
if (generatorFunction.constructor.name !== 'GeneratorFunction') {
try {
return Promise.resolve(generatorFunction.apply(this, arguments));
} catch (e) {
return Promise.reject(e);
}
}
let generator = generatorFunction.apply(this, arguments);
let handleYield = function (result) {
if (result.done) {
return Promise.resolve(result.value);
}
return Promise.resolve(result.value).then(
function (res) {
return handleYield(generator.next(res));
},
function (err) {
return handleYield(generator.throw(err));
}
);
};
try {
return handleYield(generator.next());
} catch (e) {
return Promise.reject(e);
}
};
if (arguments.length > 1) {
let args = Array.prototype.slice.call(arguments, 1);
return fn.apply(this, args);
}
return fn;
};
module.exports = spawnGenerator;