fix: adding error definition for getters

src/asserts.ts

@@ -19,6 +19,7 @@ import {
 } from './guards';
 import {
 	AnyIterable,
+	AssertError,
 	Class,
 	Func,
 	KeysOfType,
@@ -29,8 +30,6 @@ import {
 	Sizeable,
 } from './types';
 
-type AssertError = string | Func<[], unknown>;
-
 function throwError(errorCallOrMessage: AssertError): never {
 	throw typeof errorCallOrMessage === 'function'
 		? errorCallOrMessage()

src/getters.ts

@@ -1,28 +1,31 @@
 import { assertAndGet, assertAndGetProperty } from './asserts';
 import { isNonNullish, isString } from './guards';
-import { KeysOfType, Nullable, ObjectKeyType } from './types';
+import { AssertError, KeysOfType, Nullable, ObjectKeyType } from './types';
 
 export function assertAndGetNonNullish<T>(value: Nullable<T>): NonNullable<T> {
 	return assertAndGet(value, isNonNullish);
 }
 export function getDefinedProperty<T extends object, K extends keyof T>(
 	obj: T,
 	prop: K,
+	errorCallOrMessage?: AssertError,
 ): NonNullable<T[K]> {
-	return assertAndGetProperty(obj, prop, isNonNullish);
+	return assertAndGetProperty(obj, prop, isNonNullish, errorCallOrMessage);
 }
 
 export function assertAndGetStringProperty<
 	T extends object,
 	K extends KeysOfType<T, Nullable<string>>,
->(obj: T, prop: K): string;
+>(obj: T, prop: K, errorCallOrMessage?: AssertError): string;
 export function assertAndGetStringProperty<T extends object, K extends keyof T>(
 	obj: T,
 	prop: K,
+	errorCallOrMessage?: AssertError,
 ): string;
 export function assertAndGetStringProperty<K extends keyof ObjectKeyType>(
 	obj: any,
 	prop: K,
+	errorCallOrMessage?: AssertError,
 ): string {
-	return assertAndGetProperty(obj, prop, isString);
+	return assertAndGetProperty(obj, prop, isString, errorCallOrMessage);
 }

src/types.ts

@@ -39,3 +39,4 @@ export type RecursiveOmit<T, K extends ObjectKeyType> = T extends unknown[]
       },
       K
     >;
+export type AssertError = string | Func<[], unknown>;