fix type system not resolving func args

packages/boringlang/src/types/type_system.ts

@@ -58,17 +58,8 @@ class TypeSystem {
     while (true) {
       for (const comparison of this.comparisons) {
         // if already found, just update
-        if (comparison.left.typeUsage === "UnknownTypeUsage" && this.result[comparison.left.name]) {
-          foundUpdate = true;
-          comparison.left = this.result[comparison.left.name];
-        }
-        if (
-          comparison.right.typeUsage === "UnknownTypeUsage" &&
-          this.result[comparison.right.name]
-        ) {
-          foundUpdate = true;
-          comparison.right = this.result[comparison.right.name];
-        }
+        comparison.left = this.resolveType(comparison.left);
+        comparison.right = this.resolveType(comparison.right);
         // equals
         if (comparison.operation.operation === "equals") {
           // solve left
@@ -177,4 +168,21 @@ class TypeSystem {
     }
     return this.result;
   };
+
+  resolveType = (type: TypeUsage): TypeUsage => {
+    if (type.typeUsage === "UnknownTypeUsage") {
+      if (this.result[type.name]) {
+        return this.result[type.name];
+      }
+      return type;
+    }
+    if (type.typeUsage === "NamedTypeUsage") {
+      return type;
+    }
+    return {
+      typeUsage: "FunctionTypeUsage",
+      arguments: type.arguments.map((arg) => this.resolveType(arg)),
+      returnType: this.resolveType(type.returnType),
+    };
+  };
 }