From f8eee1bb7953c6a4bff384d45052d5acc3d69698 Mon Sep 17 00:00:00 2001
From: Niels Lohmann <mail@nlohmann.me>
Date: Sat, 7 Feb 2026 09:15:18 +0100
Subject: [PATCH] Annotate unreachable comment-scanner switch paths to satisfy
 C26819 (#5071)

---
 include/nlohmann/detail/input/lexer.hpp | 4 ++++
 single_include/nlohmann/json.hpp        | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/include/nlohmann/detail/input/lexer.hpp b/include/nlohmann/detail/input/lexer.hpp
index 3d63229f9..4742d889b 100644
--- a/include/nlohmann/detail/input/lexer.hpp
+++ b/include/nlohmann/detail/input/lexer.hpp
@@ -863,6 +863,8 @@ class lexer : public lexer_base<BasicJsonType>
                             break;
                     }
                 }
+
+                JSON_HEDLEY_UNREACHABLE();
             }
 
             // multi-line comments skip input until */ is read
@@ -898,6 +900,8 @@ class lexer : public lexer_base<BasicJsonType>
                             continue;
                     }
                 }
+
+                JSON_HEDLEY_UNREACHABLE();
             }
 
             // unexpected character after reading '/'
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 7d68c5add..e2bb8517b 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -8055,6 +8055,8 @@ class lexer : public lexer_base<BasicJsonType>
                             break;
                     }
                 }
+
+                JSON_HEDLEY_UNREACHABLE();
             }
 
             // multi-line comments skip input until */ is read
@@ -8090,6 +8092,8 @@ class lexer : public lexer_base<BasicJsonType>
                             continue;
                     }
                 }
+
+                JSON_HEDLEY_UNREACHABLE();
             }
 
             // unexpected character after reading '/'