From 780ff80b179f40f2c87bcb044496307d30c045d7 Mon Sep 17 00:00:00 2001
From: Niels Lohmann <mail@nlohmann.me>
Date: Sat, 5 Sep 2026 21:50:34 +0200
Subject: [PATCH] Share the position-counter bump between get() and
 get_ignoring_pending_unget()

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
---
 include/nlohmann/detail/input/lexer.hpp | 15 +++++++++++----
 single_include/nlohmann/json.hpp        | 15 +++++++++++----
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/include/nlohmann/detail/input/lexer.hpp b/include/nlohmann/detail/input/lexer.hpp
index 5861bd49d..0590e1da7 100644
--- a/include/nlohmann/detail/input/lexer.hpp
+++ b/include/nlohmann/detail/input/lexer.hpp
@@ -1446,8 +1446,7 @@ scan_number_done:
     */
     char_int_type get()
     {
-        ++position.chars_read_total;
-        ++position.chars_read_current_line;
+        advance_position();
 
         if (next_unget)
         {
@@ -1462,6 +1461,15 @@ scan_number_done:
         return track_after_read();
     }
 
+    /// shared head of get() / get_ignoring_pending_unget(): bump the
+    /// per-character position counters (line-count-on-'\n' bookkeeping is
+    /// handled afterwards, in track_after_read(), once `current` is known)
+    void advance_position() noexcept
+    {
+        ++position.chars_read_total;
+        ++position.chars_read_current_line;
+    }
+
     /// shared tail of get() / get_ignoring_pending_unget(): capture the
     /// character for error messages (if needed) and update line/column
     /// bookkeeping for the character now in `current`
@@ -1497,8 +1505,7 @@ scan_number_done:
     {
         JSON_ASSERT(!next_unget);
 
-        ++position.chars_read_total;
-        ++position.chars_read_current_line;
+        advance_position();
         current = ia.get_character();
 
         return track_after_read();
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 2a787ce8a..2aa86b0d1 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -9229,8 +9229,7 @@ scan_number_done:
     */
     char_int_type get()
     {
-        ++position.chars_read_total;
-        ++position.chars_read_current_line;
+        advance_position();
 
         if (next_unget)
         {
@@ -9245,6 +9244,15 @@ scan_number_done:
         return track_after_read();
     }
 
+    /// shared head of get() / get_ignoring_pending_unget(): bump the
+    /// per-character position counters (line-count-on-'\n' bookkeeping is
+    /// handled afterwards, in track_after_read(), once `current` is known)
+    void advance_position() noexcept
+    {
+        ++position.chars_read_total;
+        ++position.chars_read_current_line;
+    }
+
     /// shared tail of get() / get_ignoring_pending_unget(): capture the
     /// character for error messages (if needed) and update line/column
     /// bookkeeping for the character now in `current`
@@ -9280,8 +9288,7 @@ scan_number_done:
     {
         JSON_ASSERT(!next_unget);
 
-        ++position.chars_read_total;
-        ++position.chars_read_current_line;
+        advance_position();
         current = ia.get_character();
 
         return track_after_read();