Add heap type utility definitions (#2549)

Author: dcodeIO

src/glue/binaryen.d.ts

@@ -82,6 +82,16 @@ export declare function _BinaryenHeapTypeNofunc(): HeapTypeRef;
 
 export declare function _BinaryenHeapTypeIsBottom(heapType: HeapTypeRef): bool;
 export declare function _BinaryenHeapTypeGetBottom(heapType: HeapTypeRef): HeapTypeRef;
+export declare function _BinaryenHeapTypeIsSubType(left: HeapTypeRef, right: HeapTypeRef): bool;
+export declare function _BinaryenStructTypeGetNumFields(heapType: HeapTypeRef): Index;
+export declare function _BinaryenStructTypeGetFieldType(heapType: HeapTypeRef, index: Index): TypeRef;
+export declare function _BinaryenStructTypeGetFieldPackedType(heapType: HeapTypeRef, index: Index): PackedType;
+export declare function _BinaryenStructTypeIsFieldMutable(heapType: HeapTypeRef, index: Index): bool;
+export declare function _BinaryenArrayTypeGetElementType(heapType: HeapTypeRef): TypeRef;
+export declare function _BinaryenArrayTypeGetElementPackedType(heapType: HeapTypeRef): PackedType;
+export declare function _BinaryenArrayTypeIsElementMutable(heapType: HeapTypeRef): bool;
+export declare function _BinaryenSignatureTypeGetParams(heapType: HeapTypeRef): TypeRef;
+export declare function _BinaryenSignatureTypeGetResults(heapType: HeapTypeRef): TypeRef;
 
 export declare function _BinaryenModuleCreate(): ModuleRef;
 export declare function _BinaryenModuleDispose(module: ModuleRef): void;

src/glue/binaryen.js

@@ -45,6 +45,16 @@ export const {
 
   _BinaryenHeapTypeIsBottom,
   _BinaryenHeapTypeGetBottom,
+  _BinaryenHeapTypeIsSubType,
+  _BinaryenStructTypeGetNumFields,
+  _BinaryenStructTypeGetFieldType,
+  _BinaryenStructTypeGetFieldPackedType,
+  _BinaryenStructTypeIsFieldMutable,
+  _BinaryenArrayTypeGetElementType,
+  _BinaryenArrayTypeGetElementPackedType,
+  _BinaryenArrayTypeIsElementMutable,
+  _BinaryenSignatureTypeGetParams,
+  _BinaryenSignatureTypeGetResults,
 
   _BinaryenModuleCreate,
   _BinaryenModuleDispose,

src/module.ts

@@ -124,6 +124,10 @@ export namespace HeapTypeRef {
   export function getBottom(ht: HeapTypeRef): HeapTypeRef {
     return binaryen._BinaryenHeapTypeGetBottom(ht);
   }
+
+  export function isSubtype(ht: HeapTypeRef, superHt: HeapTypeRef): bool {
+    return binaryen._BinaryenHeapTypeIsSubType(ht, superHt);
+  }
 }
 
 /** Packed array element respectively struct field types. */