test: implement "register" action of WAST

1 files changed, 20 insertions, 1 deletions

diff --git a/src/Execution/Runtime.php b/src/Execution/Runtime.php
index 02c526c..2cc37b2 100644
--- a/src/Execution/Runtime.php
+++ b/src/Execution/Runtime.php
@@ -56,11 +56,30 @@ final class Runtime
     }
 
     /**
-     * @param list<ExternVal> $externVals
+     * @param array<string, array<string, Extern>> $imports
      */
     public static function instantiate(
         Store $store,
         Module $module,
+        array $imports,
+    ): self {
+        $externVals = [];
+        foreach ($module->imports as $import) {
+            $extern = $imports[$import->module][$import->name] ?? null;
+            if ($extern === null) {
+                throw new RuntimeException("instantiate: import not found: {$import->module}::{$import->name}");
+            }
+            $externVals[] = $store->register($extern);
+        }
+        return self::doInstantiate($store, $module, $externVals);
+    }
+
+    /**
+     * @param list<ExternVal> $externVals
+     */
+    private static function doInstantiate(
+        Store $store,
+        Module $module,
         array $externVals,
     ): self {
         $allocator = new Allocator($store);