Start typechecking generics

src/resolve.ts

@@ -107,6 +107,7 @@ function resolveModule(
   });
 
   const scopes: string[] = [];
+  let tyParamScopes: string[] = [];
 
   const popScope = (expected: string) => {
     const popped = scopes.pop();
@@ -130,6 +131,18 @@ function resolveModule(
       }
     }
 
+    for (let i = tyParamScopes.length - 1; i >= 0; i--) {
+      const candidate = tyParamScopes[i];
+      
+      if (candidate === ident.name) {
+        return {
+          kind: "tyParam",
+          index: i,
+          name: ident.name,
+        };
+      }
+    }
+
     const item = items.get(ident.name);
     if (item !== undefined) {
       return {
@@ -214,6 +227,13 @@ function resolveModule(
             defPath,
           };
         }
+        case "type": {
+          tyParamScopes = item.generics.map(({name}) => name);
+
+          const type = { ...superFoldItem(item, this) };
+
+          return type;
+        }
       }
 
       return { ...superFoldItem(item, this), defPath };