1 files changed, 14 insertions, 1 deletions
diff --git a/AK/StringBuilder.h b/AK/StringBuilder.h
index 36019dffa7..d154c8be3e 100644
--- a/AK/StringBuilder.h
+++ b/AK/StringBuilder.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -21,6 +21,19 @@ public:
     explicit StringBuilder(size_t initial_capacity = inline_capacity);
     ~StringBuilder() = default;
 
+    ErrorOr<void> try_append(StringView);
+    ErrorOr<void> try_append(Utf16View const&);
+    ErrorOr<void> try_append(Utf32View const&);
+    ErrorOr<void> try_append_code_point(u32);
+    ErrorOr<void> try_append(char);
+    template<typename... Parameters>
+    ErrorOr<void> try_appendff(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters)
+    {
+        VariadicFormatParams variadic_format_params { parameters... };
+        return vformat(*this, fmtstr.view(), variadic_format_params);
+    }
+    ErrorOr<void> try_append(char const*, size_t);
+
     void append(StringView);
     void append(Utf16View const&);
     void append(Utf32View const&);