Add missing Float16Array constructors (#62351)

Author: greggman

src/lib/esnext.float16.d.ts

@@ -356,6 +356,8 @@ interface Float16ArrayConstructor {
     new (length?: number): Float16Array<ArrayBuffer>;
     new (array: ArrayLike<number> | Iterable<number>): Float16Array<ArrayBuffer>;
     new <TArrayBuffer extends ArrayBufferLike = ArrayBuffer>(buffer: TArrayBuffer, byteOffset?: number, length?: number): Float16Array<TArrayBuffer>;
+    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Float16Array<ArrayBuffer>;
+    new (array: ArrayLike<number> | ArrayBuffer): Float16Array<ArrayBuffer>;
 
     /**
      * The size in bytes of each element in the array.

tests/cases/compiler/typedArrayConstructorOverloads.ts

@@ -12,6 +12,7 @@ type TypedArrayConstructor =
     | Uint16ArrayConstructor
     | Int32ArrayConstructor
     | Uint32ArrayConstructor
+    | Float16ArrayConstructor
     | Float32ArrayConstructor
     | Float64ArrayConstructor
     | BigInt64ArrayConstructor