AK: Add a retreat(count) method to GenericLexer

This method can be used to rewind a constant amount backwards in the source instead of one by one with retract()
Author: https://github.com/IdanHo Commit: 39a9cf4bb4 Pull-request: https://github.com/SerenityOS/serenity/pull/8663 Reviewed-by: https://github.com/Hendiadyoin1 Reviewed-by: https://github.com/linusg
2025-09-04 16:46:08 +00:00 · 2021-07-11 20:58:38 +03:00 · 2021-07-11 20:58:38 +03:00 · 39a9cf4bb4 · 2024-07-18 09:10:27 +09:00
commit 39a9cf4bb4
parent b2daaca5ee
1 changed files with 6 additions and 0 deletions
--- a/AK/GenericLexer.h
+++ b/AK/GenericLexer.h
@ -56,6 +56,12 @@ public:
        --m_index;
    }

+    constexpr void retreat(size_t count)
+    {
+        VERIFY(m_index >= count);
+        m_index -= count;
+    }
+
    constexpr char consume()
    {
        VERIFY(!is_eof());