[cfe-dev] clang-format: optional change behaviour of placing all function arguments/parameters into the next line

[Tilo Kühn]

i would like to see an option to format arguments and parameters a bit 
different.
at the moment if you have a function definition which doesn't fit to the 
current line and all arguments fit to the next line clang-format prefers 
method (2):

e.g.
col limit 140:

(1) void FunctionName01234567890(const Argument& a1, const Argument& a2, 
const Argument& a3, const Argument& a4, const Argument& a5);

(2) void FunctionName01234567890(const Argument& a1, const Argument& a2, 
const Argument& a3, const Argument& a4, const Argument& a5, const 
Argument& a6);

(3) void FunctionName01234567890(const Argument& a1, const Argument& a2, 
const Argument& a3, const Argument& a4, const Argument& a5, const 
Argument& a6, const Argument& a7);

results in:

(1) void FunctionName01234567890(const Argument& a1, const Argument& a2, 
const Argument& a3, const Argument& a4, const Argument& a5);

(2) void FunctionName01234567890(
     const Argument& a1, const Argument& a2, const Argument& a3, const 
Argument& a4, const Argument& a5, const Argument& a6);

(3) void FunctionName01234567890(const Argument& a1, const Argument& a2, 
const Argument& a3, const Argument& a4, const Argument& a5,
     const Argument& a6, const Argument& a7);

i prefer (1) and (3) and i will never see (2). I would love to get this 
result:

(2b) void FunctionName01234567890(const Argument& a1, const Argument& 
a2, const Argument& a3, const Argument& a4, const Argument& a5,
     const Argument& a6);

Q:
- is this just a matter of settings (penalties?)?
- if not, can somebody guide me to the place in the source where the 
decision is done if all parameters fit to one line? i would like to add 
an option for that behaviour.

Best regards
Tilo

my .clang-format settings

---
Language:        Cpp
# BasedOnStyle:  LLVM
AccessModifierOffset: -2
AlignAfterOpenBracket: false
AlignEscapedNewlinesLeft: false
AlignOperands:   true
AlignTrailingComments: true
AllowAllParametersOfDeclarationOnNextLine: true
AllowShortBlocksOnASingleLine: false
AllowShortCaseLabelsOnASingleLine: true
AllowShortIfStatementsOnASingleLine: false
AllowShortLoopsOnASingleLine: false
AllowShortFunctionsOnASingleLine: None
AlwaysBreakAfterDefinitionReturnType: false
AlwaysBreakTemplateDeclarations: false
AlwaysBreakBeforeMultilineStrings: false
BreakBeforeBinaryOperators: None
BreakBeforeTernaryOperators: true
BreakConstructorInitializersBeforeComma: false
BinPackParameters: true
BinPackArguments: true
ColumnLimit:     140
ConstructorInitializerAllOnOneLineOrOnePerLine: true
ConstructorInitializerIndentWidth: 2
DerivePointerAlignment: false
ExperimentalAutoDetectBinPacking: false
IndentCaseLabels: true
IndentWrappedFunctionNames: false
IndentFunctionDeclarationAfterType: false
MaxEmptyLinesToKeep: 3
KeepEmptyLinesAtTheStartOfBlocks: true
NamespaceIndentation: None
ObjCBlockIndentWidth: 2
ObjCSpaceAfterProperty: false
ObjCSpaceBeforeProtocolList: true
PenaltyBreakBeforeFirstCallParameter: 19
PenaltyBreakComment: 100
PenaltyBreakString: 1000
PenaltyBreakFirstLessLess: 120
PenaltyExcessCharacter: 1000000
PenaltyReturnTypeOnItsOwnLine: 60
PointerAlignment: Left
SpacesBeforeTrailingComments: 1
Cpp11BracedListStyle: true
Standard:        Cpp11
IndentWidth:     2
TabWidth:        2
UseTab:          Always
BreakBeforeBraces: Allman
SpacesInParentheses: false
SpacesInSquareBrackets: false
SpacesInAngles:  false
SpaceInEmptyParentheses: false
SpacesInCStyleCastParentheses: false
SpaceAfterCStyleCast: false
SpacesInContainerLiterals: true
SpaceBeforeAssignmentOperators: true
ContinuationIndentWidth: 2
CommentPragmas:  '^ IWYU pragma:'
ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH]
SpaceBeforeParens: ControlStatements
DisableFormat:   false
...
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20150519/b76f79ae/attachment.html>