clang-format: [JS] Handle more keyword-named methods.

Summary:
Including `do`, `for`, and `while`, `if`, `else`, `try`, `catch`, in
addition to the previously handled fields. The unit test explicitly uses
methods, but this code path handles both fields and methods.

Reviewers: krasimir

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D72827

Author: mprobst

clang/lib/Format/UnwrappedLineParser.cpp

@@ -1011,13 +1011,22 @@ void UnwrappedLineParser::parseStructuralElement() {
       parseAccessSpecifier();
     return;
   case tok::kw_if:
+    if (Style.Language == FormatStyle::LK_JavaScript && Line->MustBeDeclaration)
+      // field/method declaration.
+      break;
     parseIfThenElse();
     return;
   case tok::kw_for:
   case tok::kw_while:
+    if (Style.Language == FormatStyle::LK_JavaScript && Line->MustBeDeclaration)
+      // field/method declaration.
+      break;
     parseForOrWhileLoop();
     return;
   case tok::kw_do:
+    if (Style.Language == FormatStyle::LK_JavaScript && Line->MustBeDeclaration)
+      // field/method declaration.
+      break;
     parseDoWhile();
     return;
   case tok::kw_switch:
@@ -1045,6 +1054,9 @@ void UnwrappedLineParser::parseStructuralElement() {
     return;
   case tok::kw_try:
   case tok::kw___try:
+    if (Style.Language == FormatStyle::LK_JavaScript && Line->MustBeDeclaration)
+      // field/method declaration.
+      break;
     parseTryCatch();
     return;
   case tok::kw_extern:
@@ -1290,6 +1302,12 @@ void UnwrappedLineParser::parseStructuralElement() {
       // element continues.
       break;
     case tok::kw_try:
+      if (Style.Language == FormatStyle::LK_JavaScript &&
+          Line->MustBeDeclaration) {
+        // field/method declaration.
+        nextToken();
+        break;
+      }
       // We arrive here when parsing function-try blocks.
       if (Style.BraceWrapping.AfterFunction)
         addUnwrappedLine();

clang/unittests/Format/FormatTestJS.cpp

@@ -358,6 +358,22 @@ TEST_F(FormatTestJS, ReservedWordsMethods) {
       "    x();\n"
       "  }\n"
       "}\n");
+  verifyFormat("class KeywordNamedMethods {\n"
+               "  do() {\n"
+               "  }\n"
+               "  for() {\n"
+               "  }\n"
+               "  while() {\n"
+               "  }\n"
+               "  if() {\n"
+               "  }\n"
+               "  else() {\n"
+               "  }\n"
+               "  try() {\n"
+               "  }\n"
+               "  catch() {\n"
+               "  }\n"
+               "}\n");
 }
 
 TEST_F(FormatTestJS, ReservedWordsParenthesized) {