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Merged
merged 2 commits into from
Apr 19, 2017
Merged

Check and emit fixes for async iteration #15277

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6749c77
check and emit fixes for async iteration
rbuckton Apr 19, 2017
73142ff
Handle rejection in async delegation
rbuckton Apr 19, 2017
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8 changes: 4 additions & 4 deletions src/compiler/checker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -19703,7 +19703,7 @@ namespace ts {
}

let iteratorMethodSignatures: Signature[];
let mayBeIterable = false;
let isNonAsyncIterable = false;
if (isAsyncIterable) {
const iteratorMethod = getTypeOfPropertyOfType(type, getPropertyNameForKnownSymbolName("asyncIterator"));
if (isTypeAny(iteratorMethod)) {
Expand All @@ -19718,17 +19718,17 @@ namespace ts {
return undefined;
}
iteratorMethodSignatures = iteratorMethod && getSignaturesOfType(iteratorMethod, SignatureKind.Call);
mayBeIterable = true;
isNonAsyncIterable = true;
}

if (some(iteratorMethodSignatures)) {
const iteratorMethodReturnType = getUnionType(map(iteratorMethodSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
const iteratedType = getIteratedTypeOfIterator(iteratorMethodReturnType, errorNode, /*isAsyncIterator*/ false);
const iteratedType = getIteratedTypeOfIterator(iteratorMethodReturnType, errorNode, /*isAsyncIterator*/ !isNonAsyncIterable);
if (checkAssignability && errorNode && iteratedType) {
// If `checkAssignability` was specified, we were called from
// `checkIteratedTypeOrElementType`. As such, we need to validate that
// the type passed in is actually an Iterable.
checkTypeAssignableTo(type, mayBeIterable
checkTypeAssignableTo(type, isNonAsyncIterable
? createIterableType(iteratedType)
: createAsyncIterableType(iteratedType), errorNode);
}
Expand Down
10 changes: 5 additions & 5 deletions src/compiler/transformers/esnext.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -891,9 +891,8 @@ namespace ts {
function verb(n) { return function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]), next(); }); }; }
function next() { if (!c && q.length) resume((c = q.shift())[0], c[1]); }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(c[3], e); } }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? _yield : r.value[0] === "delegate" ? delegate : fulfill, reject); }
function _yield(value) { settle(c[2], { value: value, done: false }); }
function delegate(r) { step(r.done ? r : { value: ["yield", r.value], done: false }); }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? send : fulfill, reject); }
function send(value) { settle(c[2], { value: value, done: false }); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { c = void 0, f(v), next(); }
Expand Down Expand Up @@ -923,15 +922,16 @@ namespace ts {
scoped: false,
text: `
var __asyncDelegator = (this && this.__asyncDelegator) || function (o) {
var i = { next: verb("next"), "throw": verb("throw", function (e) { throw e; }), "return": verb("return", function (v) { return { value: v, done: true }; }) };
var i = { next: verb("next"), "throw": verb("throw", function (e) { throw e; }), "return": verb("return", function (v) { return { value: v, done: true }; }) }, p;
return o = __asyncValues(o), i[Symbol.iterator] = function () { return this; }, i;
function verb(n, f) { return function (v) { return { value: ["delegate", (o[n] || f).call(o, v)], done: false }; }; }
function verb(n, f) { return function (v) { return v = p && n === "throw" ? f(v) : p && v.done ? v : { value: p ? ["yield", v.value] : ["await", (o[n] || f).call(o, v)], done: false }, p = !p, v; }; }
};
`
};

function createAsyncDelegatorHelper(context: TransformationContext, expression: Expression, location?: TextRange) {
context.requestEmitHelper(asyncDelegator);
context.requestEmitHelper(asyncValues);
return setTextRange(
createCall(
getHelperName("__asyncDelegator"),
Expand Down
63 changes: 32 additions & 31 deletions tests/baselines/reference/emitter.asyncGenerators.classMethods.es2015.js
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Original file line number Diff line number Diff line change
Expand Up @@ -68,9 +68,8 @@ var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _ar
function verb(n) { return function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]), next(); }); }; }
function next() { if (!c && q.length) resume((c = q.shift())[0], c[1]); }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(c[3], e); } }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? _yield : r.value[0] === "delegate" ? delegate : fulfill, reject); }
function _yield(value) { settle(c[2], { value: value, done: false }); }
function delegate(r) { step(r.done ? r : { value: ["yield", r.value], done: false }); }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? send : fulfill, reject); }
function send(value) { settle(c[2], { value: value, done: false }); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { c = void 0, f(v), next(); }
Expand All @@ -89,9 +88,8 @@ var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _ar
function verb(n) { return function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]), next(); }); }; }
function next() { if (!c && q.length) resume((c = q.shift())[0], c[1]); }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(c[3], e); } }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? _yield : r.value[0] === "delegate" ? delegate : fulfill, reject); }
function _yield(value) { settle(c[2], { value: value, done: false }); }
function delegate(r) { step(r.done ? r : { value: ["yield", r.value], done: false }); }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? send : fulfill, reject); }
function send(value) { settle(c[2], { value: value, done: false }); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { c = void 0, f(v), next(); }
Expand All @@ -111,9 +109,8 @@ var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _ar
function verb(n) { return function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]), next(); }); }; }
function next() { if (!c && q.length) resume((c = q.shift())[0], c[1]); }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(c[3], e); } }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? _yield : r.value[0] === "delegate" ? delegate : fulfill, reject); }
function _yield(value) { settle(c[2], { value: value, done: false }); }
function delegate(r) { step(r.done ? r : { value: ["yield", r.value], done: false }); }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? send : fulfill, reject); }
function send(value) { settle(c[2], { value: value, done: false }); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { c = void 0, f(v), next(); }
Expand All @@ -127,9 +124,14 @@ class C3 {
}
//// [C4.js]
var __asyncDelegator = (this && this.__asyncDelegator) || function (o) {
var i = { next: verb("next"), "throw": verb("throw", function (e) { throw e; }), "return": verb("return", function (v) { return { value: v, done: true }; }) };
var i = { next: verb("next"), "throw": verb("throw", function (e) { throw e; }), "return": verb("return", function (v) { return { value: v, done: true }; }) }, p;
return o = __asyncValues(o), i[Symbol.iterator] = function () { return this; }, i;
function verb(n, f) { return function (v) { return { value: ["delegate", (o[n] || f).call(o, v)], done: false }; }; }
function verb(n, f) { return function (v) { return v = p && n === "throw" ? f(v) : p && v.done ? v : { value: p ? ["yield", v.value] : ["await", (o[n] || f).call(o, v)], done: false }, p = !p, v; }; }
};
var __asyncValues = (this && this.__asyncIterator) || function (o) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
var m = o[Symbol.asyncIterator];
return m ? m.call(o) : typeof __values === "function" ? __values(o) : o[Symbol.iterator]();
};
var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
Expand All @@ -138,9 +140,8 @@ var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _ar
function verb(n) { return function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]), next(); }); }; }
function next() { if (!c && q.length) resume((c = q.shift())[0], c[1]); }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(c[3], e); } }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? _yield : r.value[0] === "delegate" ? delegate : fulfill, reject); }
function _yield(value) { settle(c[2], { value: value, done: false }); }
function delegate(r) { step(r.done ? r : { value: ["yield", r.value], done: false }); }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? send : fulfill, reject); }
function send(value) { settle(c[2], { value: value, done: false }); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { c = void 0, f(v), next(); }
Expand All @@ -160,17 +161,21 @@ var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _ar
function verb(n) { return function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]), next(); }); }; }
function next() { if (!c && q.length) resume((c = q.shift())[0], c[1]); }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(c[3], e); } }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? _yield : r.value[0] === "delegate" ? delegate : fulfill, reject); }
function _yield(value) { settle(c[2], { value: value, done: false }); }
function delegate(r) { step(r.done ? r : { value: ["yield", r.value], done: false }); }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? send : fulfill, reject); }
function send(value) { settle(c[2], { value: value, done: false }); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { c = void 0, f(v), next(); }
};
var __asyncDelegator = (this && this.__asyncDelegator) || function (o) {
var i = { next: verb("next"), "throw": verb("throw", function (e) { throw e; }), "return": verb("return", function (v) { return { value: v, done: true }; }) };
var i = { next: verb("next"), "throw": verb("throw", function (e) { throw e; }), "return": verb("return", function (v) { return { value: v, done: true }; }) }, p;
return o = __asyncValues(o), i[Symbol.iterator] = function () { return this; }, i;
function verb(n, f) { return function (v) { return { value: ["delegate", (o[n] || f).call(o, v)], done: false }; }; }
function verb(n, f) { return function (v) { return v = p && n === "throw" ? f(v) : p && v.done ? v : { value: p ? ["yield", v.value] : ["await", (o[n] || f).call(o, v)], done: false }, p = !p, v; }; }
};
var __asyncValues = (this && this.__asyncIterator) || function (o) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
var m = o[Symbol.asyncIterator];
return m ? m.call(o) : typeof __values === "function" ? __values(o) : o[Symbol.iterator]();
};
class C5 {
f() {
Expand All @@ -187,9 +192,8 @@ var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _ar
function verb(n) { return function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]), next(); }); }; }
function next() { if (!c && q.length) resume((c = q.shift())[0], c[1]); }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(c[3], e); } }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? _yield : r.value[0] === "delegate" ? delegate : fulfill, reject); }
function _yield(value) { settle(c[2], { value: value, done: false }); }
function delegate(r) { step(r.done ? r : { value: ["yield", r.value], done: false }); }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? send : fulfill, reject); }
function send(value) { settle(c[2], { value: value, done: false }); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { c = void 0, f(v), next(); }
Expand All @@ -209,9 +213,8 @@ var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _ar
function verb(n) { return function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]), next(); }); }; }
function next() { if (!c && q.length) resume((c = q.shift())[0], c[1]); }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(c[3], e); } }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? _yield : r.value[0] === "delegate" ? delegate : fulfill, reject); }
function _yield(value) { settle(c[2], { value: value, done: false }); }
function delegate(r) { step(r.done ? r : { value: ["yield", r.value], done: false }); }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? send : fulfill, reject); }
function send(value) { settle(c[2], { value: value, done: false }); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { c = void 0, f(v), next(); }
Expand All @@ -231,9 +234,8 @@ var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _ar
function verb(n) { return function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]), next(); }); }; }
function next() { if (!c && q.length) resume((c = q.shift())[0], c[1]); }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(c[3], e); } }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? _yield : r.value[0] === "delegate" ? delegate : fulfill, reject); }
function _yield(value) { settle(c[2], { value: value, done: false }); }
function delegate(r) { step(r.done ? r : { value: ["yield", r.value], done: false }); }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? send : fulfill, reject); }
function send(value) { settle(c[2], { value: value, done: false }); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { c = void 0, f(v), next(); }
Expand All @@ -255,9 +257,8 @@ var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _ar
function verb(n) { return function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]), next(); }); }; }
function next() { if (!c && q.length) resume((c = q.shift())[0], c[1]); }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(c[3], e); } }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? _yield : r.value[0] === "delegate" ? delegate : fulfill, reject); }
function _yield(value) { settle(c[2], { value: value, done: false }); }
function delegate(r) { step(r.done ? r : { value: ["yield", r.value], done: false }); }
function step(r) { r.done ? settle(c[2], r) : Promise.resolve(r.value[1]).then(r.value[0] === "yield" ? send : fulfill, reject); }
function send(value) { settle(c[2], { value: value, done: false }); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { c = void 0, f(v), next(); }
Expand Down
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