Index: lib/Format/ContinuationIndenter.cpp =================================================================== --- lib/Format/ContinuationIndenter.cpp +++ lib/Format/ContinuationIndenter.cpp @@ -1387,6 +1387,29 @@ (Current.is(tok::greater) && Current.is(TT_DictLiteral)))) State.Stack.pop_back(); + // Reevaluate whether ObjC message arguments fit into one line. + // If a receiver spans multiple lines, e.g.: + // [[object block:^{ + // return 42; + // }] a:42 b:42]; + // BreakBeforeParameter is calculated based on an incorrect assumption + // (it is checked whether the whole expression fits into one line without + // considering a line break inside a message receiver). + // We check whether arguements fit after receiver scope closer (into the same + // line). + if (Current.MatchingParen && Current.MatchingParen->Previous) { + const FormatToken &CurrentScopeOpener = *Current.MatchingParen->Previous; + if (CurrentScopeOpener.is(TT_ObjCMethodExpr) && + CurrentScopeOpener.MatchingParen) { + int NecessarySpaceInLine = + getLengthToMatchingParen(CurrentScopeOpener, State.Stack) + + CurrentScopeOpener.TotalLength - Current.TotalLength - 1; + if (State.Column + Current.ColumnWidth + NecessarySpaceInLine <= + Style.ColumnLimit) + State.Stack.back().BreakBeforeParameter = false; + } + } + if (Current.is(tok::r_square)) { // If this ends the array subscript expr, reset the corresponding value. const FormatToken *NextNonComment = Current.getNextNonComment(); Index: unittests/Format/FormatTestObjC.cpp =================================================================== --- unittests/Format/FormatTestObjC.cpp +++ unittests/Format/FormatTestObjC.cpp @@ -796,6 +796,41 @@ verifyFormat("[((Foo *)foo) bar];"); verifyFormat("[((Foo *)foo) bar:1 blech:2];"); + // Message receiver taking multiple lines. + Style.ColumnLimit = 20; + // Non-corner case. + verifyFormat("[[object block:^{\n" + " return 42;\n" + "}] a:42 b:42];"); + // Arguments just fit into one line. + verifyFormat("[[object block:^{\n" + " return 42;\n" + "}] aaaaaaa:42 b:42];"); + // Arguments just over a column limit. + verifyFormat("[[object block:^{\n" + " return 42;\n" + "}] aaaaaaa:42\n" + " bb:42];"); + // Arguments just fit into one line. + Style.ColumnLimit = 23; + verifyFormat("[[obj a:42\n" + " b:42\n" + " c:42\n" + " d:42] e:42 f:42];"); + + // Arguments do not fit into one line with a receiver. + Style.ColumnLimit = 20; + verifyFormat("[[obj a:42] a:42\n" + " b:42];"); + verifyFormat("[[obj a:42] a:42\n" + " b:42\n" + " c:42];"); + verifyFormat("[[obj aaaaaa:42\n" + " b:42]\n" + " cc:42\n" + " d:42];"); + + Style.ColumnLimit = 70; verifyFormat( "void f() {\n"