fix(parser): should peek next value instead of eat immediately

Author: so1ve

packages/parser/src/parse.ts

@@ -211,10 +211,9 @@ export function createParser<T extends FlagsDefinition>(
 								break;
 							} else {
 								// -ab foo, we are on "b"
-								const nextValue = eat();
-								if (nextValue && !shouldProcessAsFlag(nextValue)) {
-									setValueByType(result.flags, key, nextValue, config);
-								}
+								const value =
+									hasNext && !shouldProcessAsFlag(next) ? (eat() ?? "") : "";
+								setValueByType(result.flags, key, value, config);
 							}
 						}
 					}

packages/parser/test/parser.test.ts

@@ -318,6 +318,8 @@ describe("parser", () => {
 				"-5",
 				"--eq=",
 				"---three",
+				"--string",
+				"-a",
 				"--not-given",
 			],
 			{
@@ -332,6 +334,8 @@ describe("parser", () => {
 					},
 					3: Boolean,
 					4: Boolean,
+					string: String,
+					a: String,
 					notGiven: String,
 				},
 			},
@@ -345,6 +349,8 @@ describe("parser", () => {
 			alias2: true,
 			3: true,
 			4: true,
+			string: "",
+			a: "",
 			notGiven: "",
 		});
 		expect(unknown).toEqual({});