From 8a5d7cd100ebfb8c6b353ee4ad5b14ab4105d32d Mon Sep 17 00:00:00 2001
From: Daniel Jasper <djasper@google.com>
Date: Fri, 1 Mar 2013 17:13:29 +0000
Subject: [PATCH] Correctly format arrays of pointers and function types.

Before:
void f(Type(*parameter)[10]) {}
int(*func)(void *);

After:
void f(Type (*parameter)[10]) {}
int (*func)(void *);

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176356 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Format/TokenAnnotator.cpp   |  8 ++++++++
 unittests/Format/FormatTest.cpp | 12 ++++++++----
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/lib/Format/TokenAnnotator.cpp b/lib/Format/TokenAnnotator.cpp
index 125619ccf6..f642a70309 100644
--- a/lib/Format/TokenAnnotator.cpp
+++ b/lib/Format/TokenAnnotator.cpp
@@ -645,6 +645,9 @@ private:
     if (NextToken == NULL)
       return TT_Unknown;
 
+    if (PrevToken->is(tok::l_paren) && !IsExpression)
+      return TT_PointerOrReference;
+
     if (PrevToken->is(tok::l_paren) || PrevToken->is(tok::l_square) ||
         PrevToken->is(tok::l_brace) || PrevToken->is(tok::comma) ||
         PrevToken->is(tok::kw_return) || PrevToken->is(tok::colon) ||
@@ -1041,6 +1044,11 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
   if (Tok.is(tok::colon))
     return Line.First.isNot(tok::kw_case) && !Tok.Children.empty() &&
            Tok.Type != TT_ObjCMethodExpr;
+  if (Tok.is(tok::l_paren) && !Tok.Children.empty() &&
+      Tok.Children[0].Type == TT_PointerOrReference &&
+      !Tok.Children[0].Children.empty() &&
+      Tok.Children[0].Children[0].isNot(tok::r_paren))
+    return true;
   if (Tok.Parent->Type == TT_UnaryOperator || Tok.Parent->Type == TT_CastRParen)
     return false;
   if (Tok.Type == TT_UnaryOperator)
diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index 9b640cb907..64de86a926 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -1812,7 +1812,7 @@ TEST_F(FormatTest, UnderstandsUsesOfStarAndAmp) {
   verifyFormat("int main(int argc, char **argv) {}");
   verifyFormat("Test::Test(int b) : a(b * b) {}");
   verifyIndependentOfContext("f(a, *a);");
-  verifyIndependentOfContext("f(*a);");
+  verifyFormat("void g() { f(*a); }");
   verifyIndependentOfContext("int a = b * 10;");
   verifyIndependentOfContext("int a = 10 * b;");
   verifyIndependentOfContext("int a = b * c;");
@@ -1845,6 +1845,7 @@ TEST_F(FormatTest, UnderstandsUsesOfStarAndAmp) {
   verifyIndependentOfContext("return sizeof(int **);");
   verifyIndependentOfContext("return sizeof(int ******);");
   verifyIndependentOfContext("return (int **&)a;");
+  verifyFormat("void f(Type (*parameter)[10]) {}");
   verifyGoogleFormat("return sizeof(int**);");
   verifyIndependentOfContext("Type **A = static_cast<Type **>(P);");
   verifyGoogleFormat("Type** A = static_cast<Type**>(P);");
@@ -1884,7 +1885,7 @@ TEST_F(FormatTest, UnderstandsUsesOfStarAndAmp) {
   verifyIndependentOfContext("a = &(x + y);");
   verifyIndependentOfContext("*(x + y).call();");
   verifyIndependentOfContext("&(x + y)->call();");
-  verifyIndependentOfContext("&(*I).first");
+  verifyFormat("void f() { &(*I).first; }");
 
   verifyIndependentOfContext("f(b * /* confusing comment */ ++c);");
   verifyFormat(
@@ -1909,7 +1910,9 @@ TEST_F(FormatTest, UnderstandsUsesOfStarAndAmp) {
 
   verifyIndependentOfContext("A = new SomeType *[Length]();");
   verifyGoogleFormat("A = new SomeType* [Length]();");
+}
 
+TEST_F(FormatTest, AdaptivelyFormatsPointersAndReferences) {
   EXPECT_EQ("int *a;\n"
             "int *a;\n"
             "int *a;",
@@ -1977,12 +1980,13 @@ TEST_F(FormatTest, FormatsCasts) {
 }
 
 TEST_F(FormatTest, FormatsFunctionTypes) {
-  // FIXME: Determine the cases that need a space after the return type and fix.
   verifyFormat("A<bool()> a;");
   verifyFormat("A<SomeType()> a;");
   verifyFormat("A<void(*)(int, std::string)> a;");
 
-  verifyFormat("int(*func)(void *);");
+  // FIXME: Inconsistent.
+  verifyFormat("int (*func)(void *);");
+  verifyFormat("void f() { int(*func)(void *); }");
 }
 
 TEST_F(FormatTest, BreaksLongDeclarations) {
-- 
2.40.0