From 4e5ea292bac18f6af7639cc78752086b30f03391 Mon Sep 17 00:00:00 2001
From: Sergiu Deitsch <sergiu.deitsch@gmail.com>
Date: Fri, 24 Jun 2022 00:12:09 +0200
Subject: [PATCH] Fixed MSVC 2022 warning

MSVC rightfully issues warning C4305: 'if': truncation from 'size_t' to
'bool' in a static_assert condition that implicitly converts sizeof
result to a boolean.

Change-Id: Ie3b913288bfeaa7a4b362ef7f83d2505ed368641
---
 include/ceres/internal/variadic_evaluate.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/ceres/internal/variadic_evaluate.h b/include/ceres/internal/variadic_evaluate.h
index 63e5dc2eb..dcd522752 100644
--- a/include/ceres/internal/variadic_evaluate.h
+++ b/include/ceres/internal/variadic_evaluate.h
@@ -49,7 +49,7 @@ inline bool VariadicEvaluateImpl(const Functor& functor,
                                  T* output,
                                  std::false_type /*is_dynamic*/,
                                  std::integer_sequence<int, Indices...>) {
-  static_assert(sizeof...(Indices),
+  static_assert(sizeof...(Indices) > 0,
                 "Invalid number of parameter blocks. At least one parameter "
                 "block must be specified.");
   return functor(input[Indices]..., output);