Improve valueof definitions. Add some extra tests (#2390)

Author: MaxGraey

std/assembly/index.d.ts

@@ -1349,9 +1349,9 @@ declare abstract class i31 {
 /** Macro type evaluating to the underlying native WebAssembly type. */
 declare type native<T> = T;
 /** Special type evaluating the indexed access index type. */
-declare type indexof<T extends unknown[]> = keyof T;
+declare type indexof<T extends ArrayLike<unknown>> = keyof T;
 /** Special type evaluating the indexed access value type. */
-declare type valueof<T extends unknown[]> = T[0];
+declare type valueof<T extends ArrayLike<unknown>> = T[0];
 /** A special type evaluated to the return type of T if T is a callable function. */
 declare type ReturnType<T extends (...args: any) => any> = T extends (...args: any) => infer R ? R : any;
 /** A special type evaluated to the return type of T if T is a callable function. */

tests/compiler/indexof-valueof.debug.wat

@@ -73,6 +73,23 @@
   drop
   i32.const 1
   drop
+  i32.const 0
+  i32.eqz
+  drop
+  i32.const 4
+  i32.const 4
+  i32.eq
+  drop
+  i32.const 1
+  drop
+  i32.const 1
+  drop
+  i32.const 8
+  i32.const 8
+  i32.eq
+  drop
+  i32.const 1
+  drop
   i32.const 1
   drop
   i32.const 1

tests/compiler/indexof-valueof.ts

@@ -39,6 +39,12 @@ assert(sizeof<indexof<Float32Array>>() == 4); // i32
 assert(isInteger<valueof<Uint8ClampedArray>>());
 assert(!isSigned<valueof<Uint8ClampedArray>>());
 assert(sizeof<valueof<Uint8ClampedArray>>() == 1);
+assert(isFloat<valueof<Float32Array>>());
+assert(!isInteger<valueof<Float32Array>>());
+assert(sizeof<valueof<Float32Array>>() == 4);
+assert(isInteger<valueof<Int64Array>>());
+assert(isSigned<valueof<Int64Array>>());
+assert(sizeof<valueof<Int64Array>>() == 8);
 
 // map indexes
 assert(isInteger<indexof<Map<i32,i32>>>());