simple-squiggle

A restricted subset of Squiggle
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asyncGeneratorDelegate.js (1013B)

      1 export default function _asyncGeneratorDelegate(inner, awaitWrap) {
      2   var iter = {},
      3       waiting = false;
      4 
      5   function pump(key, value) {
      6     waiting = true;
      7     value = new Promise(function (resolve) {
      8       resolve(inner[key](value));
      9     });
     10     return {
     11       done: false,
     12       value: awaitWrap(value)
     13     };
     14   }
     15 
     16   ;
     17 
     18   iter[typeof Symbol !== "undefined" && Symbol.iterator || "@@iterator"] = function () {
     19     return this;
     20   };
     21 
     22   iter.next = function (value) {
     23     if (waiting) {
     24       waiting = false;
     25       return value;
     26     }
     27 
     28     return pump("next", value);
     29   };
     30 
     31   if (typeof inner["throw"] === "function") {
     32     iter["throw"] = function (value) {
     33       if (waiting) {
     34         waiting = false;
     35         throw value;
     36       }
     37 
     38       return pump("throw", value);
     39     };
     40   }
     41 
     42   if (typeof inner["return"] === "function") {
     43     iter["return"] = function (value) {
     44       if (waiting) {
     45         waiting = false;
     46         return value;
     47       }
     48 
     49       return pump("return", value);
     50     };
     51   }
     52 
     53   return iter;
     54 }