From bc621a95ca9ab169fb8ea5999b81e395413603d5 Mon Sep 17 00:00:00 2001
From: huangqinjin <huangqinjin@gmail.com>
Date: Sun, 13 Apr 2025 22:17:59 +0800
Subject: [PATCH] Fix compilation on VS2017 (#1143)

The compiler complains about C2131: expression did not evaluate to a
constant.

https://godbolt.org/z/a198P3bdM

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
---
 include/CLI/impl/StringTools_inl.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/CLI/impl/StringTools_inl.hpp b/include/CLI/impl/StringTools_inl.hpp
index eb062d0f..72736daa 100644
--- a/include/CLI/impl/StringTools_inl.hpp
+++ b/include/CLI/impl/StringTools_inl.hpp
@@ -327,7 +327,11 @@ CLI11_INLINE std::size_t close_sequence(const std::string &str, std::size_t star
         return close_string_quote(str, start, closure_char);
     case 1:
     case 2:
+#if defined(_MSC_VER) && _MSC_VER < 1920
+    case(std::size_t)-1:
+#else
     case std::string::npos:
+#endif
         return close_literal_quote(str, start, closure_char);
     default:
         break;