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Fix map constructor to accept readonly tuple

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Fixes #29721
This commit is contained in:
Sheetal Nandi 2019-03-13 14:52:13 -07:00
parent b762d6205e
commit 027d65a920
6 changed files with 38 additions and 2 deletions
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2
src/lib/es2015.collection.d.ts vendored
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@ -10,7 +10,7 @@ interface Map<K, V> {
interface MapConstructor {
new(): Map<any, any>;
new<K, V>(entries?: ReadonlyArray<[K, V]> | null): Map<K, V>;
new<K, V>(entries?: ReadonlyArray<readonly [K, V]> | null): Map<K, V>;
readonly prototype: Map<any, any>;
}
declare var Map: MapConstructor;

2
src/lib/es2015.iterable.d.ts vendored
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@ -129,7 +129,7 @@ interface ReadonlyMap<K, V> {
}
interface MapConstructor {
new <K, V>(iterable: Iterable<[K, V]>): Map<K, V>;
new <K, V>(iterable: Iterable<readonly [K, V]>): Map<K, V>;
}
interface WeakMap<K extends object, V> { }

7
tests/baselines/reference/mapConstructorOnReadonlyTuple.js Normal file
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@ -0,0 +1,7 @@
//// [mapConstructorOnReadonlyTuple.ts]
const pairs = [['1', 1], ['2', 2]] as const
new Map(pairs);
//// [mapConstructorOnReadonlyTuple.js]
const pairs = [['1', 1], ['2', 2]];
new Map(pairs);

8
tests/baselines/reference/mapConstructorOnReadonlyTuple.symbols Normal file
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@ -0,0 +1,8 @@
=== tests/cases/compiler/mapConstructorOnReadonlyTuple.ts ===
const pairs = [['1', 1], ['2', 2]] as const
>pairs : Symbol(pairs, Decl(mapConstructorOnReadonlyTuple.ts, 0, 5))
new Map(pairs);
>Map : Symbol(Map, Decl(lib.es2015.collection.d.ts, --, --), Decl(lib.es2015.collection.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
>pairs : Symbol(pairs, Decl(mapConstructorOnReadonlyTuple.ts, 0, 5))

17
tests/baselines/reference/mapConstructorOnReadonlyTuple.types Normal file
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@ -0,0 +1,17 @@
=== tests/cases/compiler/mapConstructorOnReadonlyTuple.ts ===
const pairs = [['1', 1], ['2', 2]] as const
>pairs : readonly [readonly ["1", 1], readonly ["2", 2]]
>[['1', 1], ['2', 2]] as const : readonly [readonly ["1", 1], readonly ["2", 2]]
>[['1', 1], ['2', 2]] : readonly [readonly ["1", 1], readonly ["2", 2]]
>['1', 1] : readonly ["1", 1]
>'1' : "1"
>1 : 1
>['2', 2] : readonly ["2", 2]
>'2' : "2"
>2 : 2
new Map(pairs);
>new Map(pairs) : Map<"1" | "2", 1 | 2>
>Map : MapConstructor
>pairs : readonly [readonly ["1", 1], readonly ["2", 2]]

4
tests/cases/compiler/mapConstructorOnReadonlyTuple.ts Normal file
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@ -0,0 +1,4 @@
// @target: es2015
const pairs = [['1', 1], ['2', 2]] as const
new Map(pairs);