Fix warnings in Parse

Author: Sasha Krassovsky

lib/Parse/ParseIfConfig.cpp

@@ -51,6 +51,7 @@ static StringRef getPlatformConditionName(PlatformConditionKind Kind) {
   case PlatformConditionKind::LABEL: return IDENTIFIER;
 #include "swift/AST/PlatformConditionKinds.def"
   }
+  llvm_unreachable("Unhandled PlatformConditionKind in switch");
 }
 
 /// Extract source text of the expression.

lib/Parse/ParseRequests.cpp

@@ -86,7 +86,7 @@ BraceStmt *ParseAbstractFunctionBodyRequest::evaluate(
     return body;
   }
   }
-
+  llvm_unreachable("Unhandled BodyKind in switch");
 }
 
 

lib/Parse/Scope.cpp

@@ -145,6 +145,13 @@ void ScopeInfo::addToScope(ValueDecl *D, Parser &TheParser,
                      std::make_pair(CurScope->getDepth(), D));
 }
 
+
+// Disable the "for use only in debugger" warning.
+#if SWIFT_COMPILER_IS_MSVC
+#pragma warning(push)
+#pragma warning(disable : 4996)
+#endif
+
 void ScopeInfo::dump() const {
 #ifndef NDEBUG
   // Dump out the current list of scopes.
@@ -167,3 +174,7 @@ void ScopeInfo::dump() const {
   llvm::dbgs() << "\n";
 #endif
 }
+
+#if SWIFT_COMPILER_IS_MSVC
+#pragma warning(pop)
+#endif