From f22f524aa2d5e5ad334bcf88c69ffdb5636deed9 Mon Sep 17 00:00:00 2001
From: dmitrykobets-msft <89153909+dmitrykobets-msft@users.noreply.github.com>
Date: Tue, 22 Mar 2022 12:24:23 -0700
Subject: [PATCH] Suppress reserved identifier warning (#1041)

The following reserved identifiers are being used specifically to target certain MSVC constructs, so suppress the warning in VS 2022 (LLVM) "... is reserved because it starts with '_' followed by a capital letter":
- _Unchecked_type
- _Verify_range
- _Verify_offset
- _Unwrapped
- _Unwrap_when_unverified
- _Seek_to
- _Unchecked_begin
- _Unchecked_end
---
 tests/CMakeLists.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index cab4e56..891569b 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -62,6 +62,7 @@ if (MSVC AND (GSL_CXX_STANDARD GREATER_EQUAL 17))
     set(GSL_CPLUSPLUS_OPT -Zc:__cplusplus -permissive-)
 endif()
 
+include(CheckCXXCompilerFlag)
 # this interface adds compile options to how the tests are run
 # please try to keep entries ordered =)
 add_library(gsl_tests_config INTERFACE)
@@ -105,6 +106,10 @@ if(MSVC) # MSVC or simulating MSVC
           >
         >
     )
+    check_cxx_compiler_flag("-Wno-reserved-identifier" WARN_RESERVED_ID)
+    if (WARN_RESERVED_ID)
+        target_compile_options(gsl_tests_config INTERFACE "-Wno-reserved-identifier")
+    endif()
 else()
     target_compile_options(gsl_tests_config INTERFACE
         -fno-strict-aliasing
@@ -228,6 +233,10 @@ if(MSVC) # MSVC or simulating MSVC
           -Wno-unknown-attributes
         >
     )
+    check_cxx_compiler_flag("-Wno-reserved-identifier" WARN_RESERVED_ID)
+    if (WARN_RESERVED_ID)
+        target_compile_options(gsl_tests_config_noexcept INTERFACE "-Wno-reserved-identifier")
+    endif()
 else()
     target_compile_options(gsl_tests_config_noexcept INTERFACE
         -fno-exceptions