[clang-format] Handle object instansiation in if-statements

Before this patch code like this:

```
if (Class* obj{getObject()}) { }
```

would be mis-formated since the * would be annotated as a
binaryoperator.

This patch changes the * to become a PointerOrReference instead
and fixes the formatting issues.

Reviewed By: HazardyKnusperkeks

Differential Revision: https://reviews.llvm.org/D137327

Author: tru

clang/lib/Format/TokenAnnotator.cpp

@@ -362,7 +362,8 @@ class AnnotatingParser {
           FormatToken *Next = CurrentToken->Next;
           if (PrevPrev && PrevPrev->is(tok::identifier) &&
               Prev->isOneOf(tok::star, tok::amp, tok::ampamp) &&
-              CurrentToken->is(tok::identifier) && Next->isNot(tok::equal)) {
+              CurrentToken->is(tok::identifier) &&
+              !Next->isOneOf(tok::equal, tok::l_brace)) {
             Prev->setType(TT_BinaryOperator);
             LookForDecls = false;
           }
@@ -2387,6 +2388,12 @@ class AnnotatingParser {
       return TT_PointerOrReference;
     }
 
+    // if (Class* obj { function() })
+    if (PrevToken->Tok.isAnyIdentifier() && NextToken->Tok.isAnyIdentifier() &&
+        NextToken->Next && NextToken->Next->is(tok::l_brace)) {
+      return TT_PointerOrReference;
+    }
+
     if (PrevToken->endsSequence(tok::r_square, tok::l_square, tok::kw_delete))
       return TT_UnaryOperator;
 

clang/unittests/Format/TokenAnnotatorTest.cpp

@@ -145,6 +145,18 @@ TEST_F(TokenAnnotatorTest, UnderstandsUsesOfStarAndAmp) {
   EXPECT_TOKEN(Tokens[6], tok::l_paren, TT_FunctionTypeLParen);
   EXPECT_TOKEN(Tokens[7], tok::star, TT_UnaryOperator);
   EXPECT_TOKEN(Tokens[12], tok::star, TT_PointerOrReference);
+
+  Tokens = annotate("if (Foo * Bar / Test)");
+  ASSERT_EQ(Tokens.size(), 9u) << Tokens;
+  EXPECT_TOKEN(Tokens[3], tok::star, TT_BinaryOperator);
+
+  Tokens = annotate("if (Class* obj {getObj()})");
+  ASSERT_EQ(Tokens.size(), 12u) << Tokens;
+  EXPECT_TOKEN(Tokens[3], tok::star, TT_PointerOrReference);
+
+  Tokens = annotate("if (Foo* Bar = getObj())");
+  ASSERT_EQ(Tokens.size(), 11u) << Tokens;
+  EXPECT_TOKEN(Tokens[3], tok::star, TT_PointerOrReference);
 }
 
 TEST_F(TokenAnnotatorTest, UnderstandsUsesOfPlusAndMinus) {