From: Daniel Jasper <djasper@google.com>
Date: Thu, 5 Sep 2013 10:04:31 +0000 (+0000)
Subject: clang-format: Fix parsing and indenting lambdas.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ac2c974bc64d3767ad5e39451a874c50b3004b3a;p=clang

clang-format: Fix parsing and indenting lambdas.

Before:
  void f() {
    other(x.begin(), x.end(), //
                         [&](int, int) { return 1; });
  }

After:
  void f() {
    other(x.begin(), x.end(), //
          [&](int, int) { return 1; });
  }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190039 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Format/ContinuationIndenter.cpp b/lib/Format/ContinuationIndenter.cpp
index f9219cbaf7..c47d799f44 100644
--- a/lib/Format/ContinuationIndenter.cpp
+++ b/lib/Format/ContinuationIndenter.cpp
@@ -267,7 +267,8 @@ unsigned ContinuationIndenter::addTokenToState(LineState &State, bool Newline,
         State.Column = State.Stack.back().Indent;
         State.Stack.back().ColonPos = State.Column + Current.CodePointCount;
       }
-    } else if (Current.is(tok::l_square) && Current.Type != TT_ObjCMethodExpr) {
+    } else if (Current.is(tok::l_square) && Current.Type != TT_ObjCMethodExpr &&
+               Current.Type != TT_LambdaLSquare) {
       if (State.Stack.back().StartOfArraySubscripts != 0)
         State.Column = State.Stack.back().StartOfArraySubscripts;
       else
diff --git a/lib/Format/TokenAnnotator.cpp b/lib/Format/TokenAnnotator.cpp
index 9e17ee9f6c..46baab4aab 100644
--- a/lib/Format/TokenAnnotator.cpp
+++ b/lib/Format/TokenAnnotator.cpp
@@ -201,7 +201,8 @@ private:
 
     while (CurrentToken != NULL) {
       if (CurrentToken->is(tok::r_square)) {
-        if (CurrentToken->Next && CurrentToken->Next->is(tok::l_paren)) {
+        if (CurrentToken->Next && CurrentToken->Next->is(tok::l_paren) &&
+            Left->Type == TT_ObjCMethodExpr) {
           // An ObjC method call is rarely followed by an open parenthesis.
           // FIXME: Do we incorrectly label ":" with this?
           StartsObjCMethodExpr = false;
diff --git a/lib/Format/UnwrappedLineParser.cpp b/lib/Format/UnwrappedLineParser.cpp
index 4e70625f5b..13b9847527 100644
--- a/lib/Format/UnwrappedLineParser.cpp
+++ b/lib/Format/UnwrappedLineParser.cpp
@@ -676,27 +676,22 @@ void UnwrappedLineParser::parseStructuralElement() {
 void UnwrappedLineParser::tryToParseLambda() {
   assert(FormatTok->is(tok::l_square));
   FormatToken &LSquare = *FormatTok;
-  if (!tryToParseLambdaIntroducer()) {
+  if (!tryToParseLambdaIntroducer())
     return;
-  }
-  if (FormatTok->is(tok::l_paren)) {
-    parseParens();
-  }
 
   while (FormatTok->isNot(tok::l_brace)) {
     switch (FormatTok->Tok.getKind()) {
-      case tok::l_brace:
-        break;
-      case tok::l_paren:
-        parseParens();
-        break;
-      case tok::semi:
-      case tok::equal:
-      case tok::eof:
-        return;
-      default:
-        nextToken();
-        break;
+    case tok::l_brace:
+      break;
+    case tok::l_paren:
+      parseParens();
+      break;
+    case tok::identifier:
+    case tok::kw_mutable:
+      nextToken();
+      break;
+    default:
+      return;
     }
   }
   LSquare.Type = TT_LambdaLSquare;
@@ -707,23 +702,33 @@ bool UnwrappedLineParser::tryToParseLambdaIntroducer() {
   nextToken();
   if (FormatTok->is(tok::equal)) {
     nextToken();
-    if (FormatTok->is(tok::r_square)) return true;
-    if (FormatTok->isNot(tok::comma)) return false;
+    if (FormatTok->is(tok::r_square)) {
+      nextToken();
+      return true;
+    }
+    if (FormatTok->isNot(tok::comma))
+      return false;
     nextToken();
   } else if (FormatTok->is(tok::amp)) {
     nextToken();
-    if (FormatTok->is(tok::r_square)) return true;
+    if (FormatTok->is(tok::r_square)) {
+      nextToken();
+      return true;
+    }
     if (!FormatTok->isOneOf(tok::comma, tok::identifier)) {
       return false;
     }
-    if (FormatTok->is(tok::comma)) nextToken();
+    if (FormatTok->is(tok::comma))
+      nextToken();
   } else if (FormatTok->is(tok::r_square)) {
     nextToken();
     return true;
   }
   do {
-    if (FormatTok->is(tok::amp)) nextToken();
-    if (!FormatTok->isOneOf(tok::identifier, tok::kw_this)) return false;
+    if (FormatTok->is(tok::amp))
+      nextToken();
+    if (!FormatTok->isOneOf(tok::identifier, tok::kw_this))
+      return false;
     nextToken();
     if (FormatTok->is(tok::comma)) {
       nextToken();
@@ -836,6 +841,9 @@ void UnwrappedLineParser::parseParens() {
     case tok::r_brace:
       // A "}" inside parenthesis is an error if there wasn't a matching "{".
       return;
+    case tok::l_square:
+      tryToParseLambda();
+      break;
     case tok::l_brace: {
       if (!tryToParseBracedList()) {
         parseChildBlock();
@@ -1195,7 +1203,7 @@ static void printDebugInfo(const UnwrappedLine &Line, StringRef Prefix = "") {
   for (std::list<UnwrappedLineNode>::const_iterator I = Line.Tokens.begin(),
                                                     E = Line.Tokens.end();
        I != E; ++I) {
-    llvm::dbgs() << I->Tok->Tok.getName() << " ";
+    llvm::dbgs() << I->Tok->Tok.getName() << "[" << I->Tok->Type << "] ";
   }
   for (std::list<UnwrappedLineNode>::const_iterator I = Line.Tokens.begin(),
                                                     E = Line.Tokens.end();
diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index 3dfcd7473d..5e5a579ddb 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -6295,12 +6295,10 @@ TEST_F(FormatTest, FormatsLambdas) {
   verifyFormat("void f() {\n"
                "  other(x.begin(), x.end(), [&](int, int) { return 1; });\n"
                "}\n");
-  // FIXME: The formatting is incorrect; this test currently checks that
-  // parsing of the unwrapped lines doesn't regress.
   verifyFormat("void f() {\n"
                "  other(x.begin(), //\n"
                "        x.end(),   //\n"
-               "                     [&](int, int) { return 1; });\n"
+               "        [&](int, int) { return 1; });\n"
                "}\n");
 }