clang-format: Avoid line breaks before the first <<.
This puts a slight penalty on the linebreak before the first "<<", so that clang-format generally tries to keep things on the first line. User feedback has shown that this is generally desirable. Before: llvm::outs() << "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =" << aaaaaaaaaaaaaaaaaaaaaaaaaaa; After: llvm::outs() << "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =" << aaaaaaaaaaaaaaaaaaaaaaaaaaa; llvm-svn: 186115
This commit is contained in:
parent
4822d9263a
commit
4e9678f7a1
|
@ -45,6 +45,9 @@ struct FormatStyle {
|
|||
/// \brief The penalty for each character outside of the column limit.
|
||||
unsigned PenaltyExcessCharacter;
|
||||
|
||||
/// \brief The penalty for breaking before the first "<<".
|
||||
unsigned PenaltyBreakFirstLessLess;
|
||||
|
||||
/// \brief Set whether & and * bind to the type as opposed to the variable.
|
||||
bool PointerBindsToType;
|
||||
|
||||
|
@ -173,8 +176,9 @@ struct FormatStyle {
|
|||
IndentWidth == R.IndentWidth &&
|
||||
MaxEmptyLinesToKeep == R.MaxEmptyLinesToKeep &&
|
||||
ObjCSpaceBeforeProtocolList == R.ObjCSpaceBeforeProtocolList &&
|
||||
PenaltyBreakString == R.PenaltyBreakString &&
|
||||
PenaltyBreakComment == R.PenaltyBreakComment &&
|
||||
PenaltyBreakFirstLessLess == R.PenaltyBreakFirstLessLess &&
|
||||
PenaltyBreakString == R.PenaltyBreakString &&
|
||||
PenaltyExcessCharacter == R.PenaltyExcessCharacter &&
|
||||
PenaltyReturnTypeOnItsOwnLine == R.PenaltyReturnTypeOnItsOwnLine &&
|
||||
PointerBindsToType == R.PointerBindsToType &&
|
||||
|
|
|
@ -102,6 +102,8 @@ template <> struct MappingTraits<clang::format::FormatStyle> {
|
|||
Style.ObjCSpaceBeforeProtocolList);
|
||||
IO.mapOptional("PenaltyBreakComment", Style.PenaltyBreakComment);
|
||||
IO.mapOptional("PenaltyBreakString", Style.PenaltyBreakString);
|
||||
IO.mapOptional("PenaltyBreakFirstLessLess",
|
||||
Style.PenaltyBreakFirstLessLess);
|
||||
IO.mapOptional("PenaltyExcessCharacter", Style.PenaltyExcessCharacter);
|
||||
IO.mapOptional("PenaltyReturnTypeOnItsOwnLine",
|
||||
Style.PenaltyReturnTypeOnItsOwnLine);
|
||||
|
@ -123,6 +125,13 @@ template <> struct MappingTraits<clang::format::FormatStyle> {
|
|||
namespace clang {
|
||||
namespace format {
|
||||
|
||||
void setDefaultPenalties(FormatStyle &Style) {
|
||||
Style.PenaltyBreakComment = 45;
|
||||
Style.PenaltyBreakFirstLessLess = 100;
|
||||
Style.PenaltyBreakString = 1000;
|
||||
Style.PenaltyExcessCharacter = 1000000;
|
||||
}
|
||||
|
||||
FormatStyle getLLVMStyle() {
|
||||
FormatStyle LLVMStyle;
|
||||
LLVMStyle.AccessModifierOffset = -2;
|
||||
|
@ -140,10 +149,6 @@ FormatStyle getLLVMStyle() {
|
|||
LLVMStyle.IndentCaseLabels = false;
|
||||
LLVMStyle.MaxEmptyLinesToKeep = 1;
|
||||
LLVMStyle.ObjCSpaceBeforeProtocolList = true;
|
||||
LLVMStyle.PenaltyBreakComment = 45;
|
||||
LLVMStyle.PenaltyBreakString = 1000;
|
||||
LLVMStyle.PenaltyExcessCharacter = 1000000;
|
||||
LLVMStyle.PenaltyReturnTypeOnItsOwnLine = 60;
|
||||
LLVMStyle.PointerBindsToType = false;
|
||||
LLVMStyle.SpacesBeforeTrailingComments = 1;
|
||||
LLVMStyle.SpacesInBracedLists = true;
|
||||
|
@ -152,6 +157,10 @@ FormatStyle getLLVMStyle() {
|
|||
LLVMStyle.UseTab = false;
|
||||
LLVMStyle.BreakBeforeBraces = FormatStyle::BS_Attach;
|
||||
LLVMStyle.IndentFunctionDeclarationAfterType = false;
|
||||
|
||||
setDefaultPenalties(LLVMStyle);
|
||||
LLVMStyle.PenaltyReturnTypeOnItsOwnLine = 60;
|
||||
|
||||
return LLVMStyle;
|
||||
}
|
||||
|
||||
|
@ -172,10 +181,6 @@ FormatStyle getGoogleStyle() {
|
|||
GoogleStyle.IndentCaseLabels = true;
|
||||
GoogleStyle.MaxEmptyLinesToKeep = 1;
|
||||
GoogleStyle.ObjCSpaceBeforeProtocolList = false;
|
||||
GoogleStyle.PenaltyBreakComment = 45;
|
||||
GoogleStyle.PenaltyBreakString = 1000;
|
||||
GoogleStyle.PenaltyExcessCharacter = 1000000;
|
||||
GoogleStyle.PenaltyReturnTypeOnItsOwnLine = 200;
|
||||
GoogleStyle.PointerBindsToType = true;
|
||||
GoogleStyle.SpacesBeforeTrailingComments = 2;
|
||||
GoogleStyle.SpacesInBracedLists = false;
|
||||
|
@ -184,6 +189,10 @@ FormatStyle getGoogleStyle() {
|
|||
GoogleStyle.UseTab = false;
|
||||
GoogleStyle.BreakBeforeBraces = FormatStyle::BS_Attach;
|
||||
GoogleStyle.IndentFunctionDeclarationAfterType = true;
|
||||
|
||||
setDefaultPenalties(GoogleStyle);
|
||||
GoogleStyle.PenaltyReturnTypeOnItsOwnLine = 200;
|
||||
|
||||
return GoogleStyle;
|
||||
}
|
||||
|
||||
|
@ -503,6 +512,10 @@ private:
|
|||
const FormatToken &Current = *State.NextToken;
|
||||
const FormatToken &Previous = *State.NextToken->Previous;
|
||||
|
||||
// Extra penalty that needs to be added because of the way certain line
|
||||
// breaks are chosen.
|
||||
unsigned ExtraPenalty = 0;
|
||||
|
||||
if (State.Stack.size() == 0 || Current.Type == TT_ImplicitStringLiteral) {
|
||||
// FIXME: Is this correct?
|
||||
int WhitespaceLength = SourceMgr.getSpellingColumnNumber(
|
||||
|
@ -621,6 +634,11 @@ private:
|
|||
Line.MustBeDeclaration))
|
||||
State.Stack.back().BreakBeforeParameter = true;
|
||||
}
|
||||
|
||||
// Breaking before the first "<<" is generally not desirable.
|
||||
if (Current.is(tok::lessless) && State.Stack.back().FirstLessLess == 0)
|
||||
ExtraPenalty += Style.PenaltyBreakFirstLessLess;
|
||||
|
||||
} else {
|
||||
if (Current.is(tok::equal) &&
|
||||
(RootToken->is(tok::kw_for) || State.ParenLevel == 0) &&
|
||||
|
@ -699,7 +717,7 @@ private:
|
|||
}
|
||||
}
|
||||
|
||||
return moveStateToNextToken(State, DryRun);
|
||||
return moveStateToNextToken(State, DryRun) + ExtraPenalty;
|
||||
}
|
||||
|
||||
/// \brief Mark the next token as consumed in \p State and modify its stacks
|
||||
|
|
|
@ -3002,6 +3002,22 @@ TEST_F(FormatTest, AlignsPipes) {
|
|||
verifyFormat("llvm::outs() << \"aaaaaaaaaaaaaaaaaaaaaaaa: \"\n"
|
||||
" << aaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
|
||||
|
||||
// Breaking before the first "<<" is generally not desirable.
|
||||
verifyFormat(
|
||||
"llvm::errs()\n"
|
||||
" << \"aaaaaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
|
||||
" << \"aaaaaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
|
||||
" << \"aaaaaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
|
||||
" << \"aaaaaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa;",
|
||||
getLLVMStyleWithColumns(70));
|
||||
verifyFormat("llvm::errs() << \"aaaaaaaaaaaaaaaaaaa: \"\n"
|
||||
" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
|
||||
" << \"aaaaaaaaaaaaaaaaaaa: \"\n"
|
||||
" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
|
||||
" << \"aaaaaaaaaaaaaaaaaaa: \"\n"
|
||||
" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa;",
|
||||
getLLVMStyleWithColumns(70));
|
||||
|
||||
verifyFormat(
|
||||
"llvm::errs() << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
|
||||
" .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");
|
||||
|
|
Loading…
Reference in New Issue