lib Fix Part 1/6 – WeakMap constructor (#50449)

Co-authored-by: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>

Author: graphemecluster

src/lib/es2015.collection.d.ts

@@ -64,7 +64,7 @@ interface WeakMap<K extends object, V> {
 }
 
 interface WeakMapConstructor {
-    new <K extends object = object, V = any>(entries?: readonly [K, V][] | null): WeakMap<K, V>;
+    new <K extends object = object, V = any>(entries?: readonly (readonly [K, V])[] | null): WeakMap<K, V>;
     readonly prototype: WeakMap<object, any>;
 }
 declare var WeakMap: WeakMapConstructor;

tests/baselines/reference/mapConstructorOnReadonlyTuple.js

@@ -1,7 +1,10 @@
 //// [mapConstructorOnReadonlyTuple.ts]
-const pairs = [['1', 1], ['2', 2]] as const
-new Map(pairs);
+const pairs = [[{}, 1], [{}, 2]] as const;
+new Map(pairs);
+new WeakMap(pairs);
+
 
 //// [mapConstructorOnReadonlyTuple.js]
-const pairs = [['1', 1], ['2', 2]];
+const pairs = [[{}, 1], [{}, 2]];
 new Map(pairs);
+new WeakMap(pairs);

tests/baselines/reference/mapConstructorOnReadonlyTuple.symbols

@@ -1,9 +1,13 @@
 === tests/cases/compiler/mapConstructorOnReadonlyTuple.ts ===
-const pairs = [['1', 1], ['2', 2]] as const
+const pairs = [[{}, 1], [{}, 2]] as const;
 >pairs : Symbol(pairs, Decl(mapConstructorOnReadonlyTuple.ts, 0, 5))
 >const : Symbol(const)
 
 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))
 
+new WeakMap(pairs);
+>WeakMap : Symbol(WeakMap, 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))
+

tests/baselines/reference/mapConstructorOnReadonlyTuple.types

@@ -1,17 +1,22 @@
 === 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"
+const pairs = [[{}, 1], [{}, 2]] as const;
+>pairs : readonly [readonly [{}, 1], readonly [{}, 2]]
+>[[{}, 1], [{}, 2]] as const : readonly [readonly [{}, 1], readonly [{}, 2]]
+>[[{}, 1], [{}, 2]] : readonly [readonly [{}, 1], readonly [{}, 2]]
+>[{}, 1] : readonly [{}, 1]
+>{} : {}
 >1 : 1
->['2', 2] : readonly ["2", 2]
->'2' : "2"
+>[{}, 2] : readonly [{}, 2]
+>{} : {}
 >2 : 2
 
 new Map(pairs);
->new Map(pairs) : Map<"1" | "2", 1 | 2>
+>new Map(pairs) : Map<{}, 1 | 2>
 >Map : MapConstructor
->pairs : readonly [readonly ["1", 1], readonly ["2", 2]]
+>pairs : readonly [readonly [{}, 1], readonly [{}, 2]]
+
+new WeakMap(pairs);
+>new WeakMap(pairs) : WeakMap<{}, 1 | 2>
+>WeakMap : WeakMapConstructor
+>pairs : readonly [readonly [{}, 1], readonly [{}, 2]]
 

tests/cases/compiler/mapConstructorOnReadonlyTuple.ts

@@ -1,4 +1,5 @@
 // @target: es2015
 
-const pairs = [['1', 1], ['2', 2]] as const
-new Map(pairs);
+const pairs = [[{}, 1], [{}, 2]] as const;
+new Map(pairs);
+new WeakMap(pairs);