clang-format: [JS] Treat regex literals like string literals.

Using the token type "unknown" can interfere badly with
WhitespaceManager's way of handling multiline comments.

llvm-svn: 241273

clang/lib/Format/Format.cpp

@@ -808,6 +808,8 @@ private:
         Tokens.resize(Tokens.size() - TokenCount);
         Tokens.back()->Tok.setKind(tok::unknown);
         Tokens.back()->Type = TT_RegexLiteral;
+        // Treat regex literals like other string_literals.
+        Tokens.back()->Tok.setKind(tok::string_literal);
         Tokens.back()->ColumnWidth += LastColumn - I[0]->OriginalColumn;
         return true;
       }

clang/unittests/Format/FormatTestJS.cpp

@@ -638,6 +638,10 @@ TEST_F(FormatTestJS, RegexLiteralSpecialCharacters) {
                getGoogleJSStyleWithColumns(15));
   verifyFormat("var regex =  //\n"
                "    /a/;");
+  verifyFormat("var regexs = [\n"
+               "  /d/,   //\n"
+               "  /aa/,  //\n"
+               "];");
 }
 
 TEST_F(FormatTestJS, RegexLiteralModifiers) {