chore: enable strictNullChecks

Author: nlf

lib/build/nodes.ts

@@ -84,7 +84,7 @@ export function typeAliasDeclaration(name: string, node: TypeNode, exported: boo
   return f.createTypeAliasDeclaration(exported ? [exportToken()] : [], name, types, node);
 }
 
-export function typeParameterDeclaration(name: string, constraint: TypeNode = undefined, def: TypeNode = undefined) {
+export function typeParameterDeclaration(name: string, constraint?: TypeNode, def?: TypeNode) {
   return f.createTypeParameterDeclaration(undefined, name, constraint, def);
 }
 

lib/types.ts

@@ -118,15 +118,25 @@ export type ResponseType<R extends Route> = R["settings"]["response"];
 /**
  * Get the response body type for a route (this is likely a union)
  */
-export type BodyType<R extends Route> = R["settings"]["response"]["body"];
+export type BodyType<R extends Route> = "body" extends keyof R["settings"]["response"]
+  ? R["settings"]["response"]["body"]
+  : unknown;
 /**
  * Get the response type for a route matching a specific status code
  */
-export type SpecificResponseType<R extends Route, S extends StatusCode = StatusCode> = Extract<R["settings"]["response"], { status: S }>;
+export type SpecificResponseType<R extends Route, S extends StatusCode = StatusCode> = R["settings"]["response"] extends { status: S }
+  ? R["settings"]["response"]
+  : "status" extends keyof R["settings"]["response"]
+    ? S extends R["settings"]["response"]["status"]
+      ? R["settings"]["response"]
+      : RouteSettings["response"]
+    : RouteSettings["response"];
 /**
  * Get the response body type for a route matching a specific status code
  */
-export type SpecificBodyType<R extends Route, S extends StatusCode = StatusCode> = SpecificResponseType<R, S>["body"];
+export type SpecificBodyType<R extends Route, S extends StatusCode = StatusCode> = "body" extends keyof SpecificResponseType<R, S>
+  ? SpecificResponseType<R, S>["body"]
+  : unknown;
 
 /**
  * Get a list of all available paths for a given method on a route union

tsconfig.json

@@ -10,6 +10,7 @@
     "module": "nodenext",
     "target": "esnext",
     "skipLibCheck": true,
+    "strictNullChecks": true,
     "allowImportingTsExtensions": true,
     "verbatimModuleSyntax": true,
     "erasableSyntaxOnly": true,