Fix MSVC "not all control paths return a value" warning. NFC.

RKSimon · RKSimon · commit b9aaf32f4649 · 2020-08-11T18:13:03.000+01:00
diff --git a/clang/lib/Tooling/Transformer/RewriteRule.cpp b/clang/lib/Tooling/Transformer/RewriteRule.cpp
@@ -131,6 +131,7 @@ static std::string formatHeaderPath(StringRef Header, IncludeFormat Format) {
   case transformer::IncludeFormat::Angled:
     return ("<" + Header + ">").str();
   }
+  llvm_unreachable("Unknown transformer::IncludeFormat enum");
 }
 
 ASTEdit transformer::addInclude(RangeSelector Target, StringRef Header,

Original file line number	Diff line number	Diff line change
`@@ -131,6 +131,7 @@ static std::string formatHeaderPath(StringRef Header, IncludeFormat Format) {`
`131`	`131`	`case transformer::IncludeFormat::Angled:`
`132`	`132`	`return ("<" + Header + ">").str();`
`133`	`133`	`}`
	`134`	`+ llvm_unreachable("Unknown transformer::IncludeFormat enum");`
`134`	`135`	`}`
`135`	`136`
`136`	`137`	`ASTEdit transformer::addInclude(RangeSelector Target, StringRef Header,`