[PATCH] D36684: clang-format: [JS] wrap optional properties in type aliases.

[Martin Probst via Phabricator via cfe-commits]

mprobst created this revision.
Herald added a subscriber: klimek.

clang-format wraps object literal keys in an object literal if they are
marked as `TT_SelectorName`s and/or the colon is marked as
`TT_DictLiteral`. Previously, clang-format would accidentally work
because colons in type aliases were marked as `TT_DictLiteral`. r310367
fixed this to assing `TT_JsTypeColon`, which broke wrapping in certain
situations. However the root cause was that clang-format incorrectly
didn't skip questionmarks when detecting selector name.

This change fixes both locations to (1) assign `TT_SelectorName` and (2)
treat `TT_JsTypeColon` like `TT_DictLiteral`.

Previously:

  type X = {
    a: string, b?: string,
  };

Now:

  type X = {
    a: string,
    b?: string,
  };


https://reviews.llvm.org/D36684

Files:
  lib/Format/TokenAnnotator.cpp
  unittests/Format/FormatTestJS.cpp


Index: unittests/Format/FormatTestJS.cpp
===================================================================
--- unittests/Format/FormatTestJS.cpp
+++ unittests/Format/FormatTestJS.cpp
@@ -1555,6 +1555,10 @@
                "  y: number\n"
                "};\n"
                "class C {}");
+  verifyFormat("export type X = {\n"
+               "  a: string,\n"
+               "  b?: string,\n"
+               "};\n");
 }
 
 TEST_F(FormatTestJS, TypeInterfaceLineWrapping) {
Index: lib/Format/TokenAnnotator.cpp
===================================================================
--- lib/Format/TokenAnnotator.cpp
+++ lib/Format/TokenAnnotator.cpp
@@ -459,6 +459,8 @@
         updateParameterCount(Left, CurrentToken);
         if (CurrentToken->isOneOf(tok::colon, tok::l_brace, tok::less)) {
           FormatToken *Previous = CurrentToken->getPreviousNonComment();
+          if (Previous->is(TT_JsTypeOptionalQuestion))
+            Previous = Previous->getPreviousNonComment();
           if (((CurrentToken->is(tok::colon) &&
                 (!Contexts.back().ColonIsDictLiteral || !Style.isCpp())) ||
                Style.Language == FormatStyle::LK_Proto ||
@@ -1601,7 +1603,7 @@
       if (Current->is(TT_ConditionalExpr))
         return prec::Conditional;
       if (NextNonComment && Current->is(TT_SelectorName) &&
-          (NextNonComment->is(TT_DictLiteral) ||
+          (NextNonComment->isOneOf(TT_DictLiteral, TT_JsTypeColon) ||
            ((Style.Language == FormatStyle::LK_Proto ||
              Style.Language == FormatStyle::LK_TextProto) &&
             NextNonComment->is(tok::less))))


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