From 0d1c20f61b4072e8ca88173c583e89cd4547671b Mon Sep 17 00:00:00 2001
From: ATATC <futerry@outlook.com>
Date: Sun, 13 Aug 2023 19:08:51 +0800
Subject: [PATCH] Bug fixed: `java.lang.StringIndexOutOfBoundsException` when
 parsing an empty `MultiComponent`.

---
 .../java/com/atatctech/hephaestus/component/MultiComponent.java  | 1 +
 src/main/java/com/atatctech/hephaestus/component/Ref.java        | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/main/java/com/atatctech/hephaestus/component/MultiComponent.java b/src/main/java/com/atatctech/hephaestus/component/MultiComponent.java
index e9aa19f..5d4d6a8 100644
--- a/src/main/java/com/atatctech/hephaestus/component/MultiComponent.java
+++ b/src/main/java/com/atatctech/hephaestus/component/MultiComponent.java
@@ -13,6 +13,7 @@
 @ComponentConfig(tagName = "mc")
 public class MultiComponent extends Component implements Collection<Component> {
     public static @NotNull Parser<MultiComponent> PARSER = expr -> {
+        if (expr.isEmpty()) return new MultiComponent();
         char open = expr.charAt(0);
         Text.IndexPair indexes = Text.matchBrackets(expr, open, Text.pairBracket(open));
         int endIndex = indexes.end();
diff --git a/src/main/java/com/atatctech/hephaestus/component/Ref.java b/src/main/java/com/atatctech/hephaestus/component/Ref.java
index 18a849e..87687f9 100644
--- a/src/main/java/com/atatctech/hephaestus/component/Ref.java
+++ b/src/main/java/com/atatctech/hephaestus/component/Ref.java
@@ -11,6 +11,7 @@ public class Ref extends Component {
     static {
         PARSER = Ref::new;
     }
+
     protected @Nullable Component to;
 
     public Ref(@Nullable String id) {