[Flang][Runtime][tests] Escape regex special character.

[Meinersbur]

Summary

The second argument of ASSERT_DEATH describes a regular expression, in which parenthesis have special meaning. Matches of literal parentheses need to be escaped.

Fixes failure of InvalidFormatFailure.ParenMismatch and InvalidFormatFailure.ParenMismatch when gtest is compiled with msvc's regex implementation.

[awarzynski]

Thank you for the fix!

[Meinersbur]

This was the last patch to make the windows buildbot green: http://meinersbur.de:8011/#/builders/146/builds/593

Patch to make it an official buildbot: D103199

flang/unittests/RuntimeGTest/Format.cpp

182

Note: . is interpreted as well, but stands for any character, including ..

flang/unittests/RuntimeGTest/Format.cpp

TEST(InvalidFormatFailure, ParenMismatch) {
   static constexpr int repeat{1};
 
   TestFormatContext context;
   FormatControl<decltype(context)> control{
       context, format, std::strlen(format)};
 
   ASSERT_DEATH(
       context.Report(/*edit=*/control.GetNextDataEdit(context, repeat)),
-      "FORMAT missing at least one ')'");
+      R"(FORMAT missing at least one '\)')");
 }
 
 TEST(InvalidFormatFailure, MissingPrecision) {
   static constexpr const char *format{"(F9.)"};
   static constexpr int repeat{1};
 
   TestFormatContext context;
   FormatControl<decltype(context)> control{
       context, format, std::strlen(format)};
 
   ASSERT_DEATH(
       context.Report(/*edit=*/control.GetNextDataEdit(context, repeat)),
-      "Invalid FORMAT: integer expected at ')'");
+      R"(Invalid FORMAT: integer expected at '\)')");
 }
 
 TEST(InvalidFormatFailure, MissingFormatWidth) {
   static constexpr const char *format{"(F.9)"};
   static constexpr int repeat{1};
 
   TestFormatContext context;
   FormatControl<decltype(context)> control{
       context, format, std::strlen(format)};
 
   ASSERT_DEATH(
       context.Report(/*edit=*/control.GetNextDataEdit(context, repeat)),
       "Invalid FORMAT: integer expected at '.'");
 }