From: Carlos O'Donell <carlos@redhat.com>
To: Noah Goldstein <goldstein.w.n@gmail.com>, libc-alpha@sourceware.org
Subject: Re: [PATCH v5] Add .clang-format style file
Date: Mon, 4 Apr 2022 10:13:03 -0400 [thread overview]
Message-ID: <9c8afd2f-9bcb-d97a-67f5-01eee60d069c@redhat.com> (raw)
In-Reply-To: <20220330202432.3185472-1-goldstein.w.n@gmail.com>
On 3/30/22 16:24, Noah Goldstein via Libc-alpha wrote:
> Went with version >= 11.0 since it covers most of the major features
> and should be pretty universally accessibly.
Almost there. I think with v6 we'll have a version we can commit.
Thanks for iterating.
> There are some issues:
>
> 1. indention of preprocessor directives:
> Unfortunately there doesn't appear to be a switch for a seperate
> 'IndentWidth' for preprocessor directives vs. normal code so we
> are stuck either not indenting the directives or over-indenting
> them. i.e:
> Desired:
> ```
> #ifndef A
> # define B
> #endif
> ```
> Options:
> ```
> #ifndef A
> # define B /* Two spaces instead of one. */
> #endif
>
> #ifndef C
> #define D /* No spaces. */
> #endif
> ```
> Chose to over-indent as it generally seems easier to script
> halving all pre-processor indentations than counting the nested
> depth and indenting from scratch.
>
> 2. concatenation of lines missing semi-colons:
> Throughout glibc there are macros used to setup aliasing that are
> outside of functions and don't end in semi-colons i.e:
> ```
> libc_hidden_def (__pthread_self)
> weak_alias (__pthread_self, pthread_self)
> ```
>
> clang-format reformats lines like these to:
> ```
> libc_hidden_def (__pthread_self) weak_alias (__pthread_self, pthread_self)
> ```
>
> which is generally undesirable.
>
> Other than those two big concerns there are certainly some questions
> diffs but for the most part it creates a easy to read and consistent
> style.
> ---
> .clang-format | 156 ++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 156 insertions(+)
> create mode 100644 .clang-format
>
> diff --git a/.clang-format b/.clang-format
> new file mode 100644
> index 0000000000..c0d993fd03
> --- /dev/null
> +++ b/.clang-format
> @@ -0,0 +1,156 @@
> +# clang-format file for GLIBC
> +# Copyright (C) 2022 Free Software Foundation, Inc.
> +# This file is part of the GNU C Library.
> +#
> +# The GNU C Library is free software; you can redistribute it and/or
> +# modify it under the terms of the GNU Lesser General Public
> +# License as published by the Free Software Foundation; either
> +# version 2.1 of the License, or (at your option) any later version.
> +#
> +# The GNU C Library is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> +# Lesser General Public License for more details.
> +#
> +# You should have received a copy of the GNU Lesser General Public
> +# License along with the GNU C Library; if not, see
> +# <https://www.gnu.org/licenses/>.
> +#
> +# Requires clang-format version >= 11.0
> +#
> +# For more information, see:
> +#
> +# Documentation/process/clang-format.rst
This is not a valid path in the glibc source tree.
> +# https://clang.llvm.org/docs/ClangFormat.html
> +# https://clang.llvm.org/docs/ClangFormatStyleOptions.html
> +#
> +# There are some known cases that this doesn't produce the desired
> +# style (i.e Preprocessor Directives are over-indented and not
> +# auto-commented). As a result, this is meant to be a utility to make
> +# formatting easier, not a definitive standard.
> +#
> +# To format the current git diff inplace (-i) the follow command can
> +# be used:
> +# $> git diff -U0 --no-color HEAD^ | clang-format-diff -i -p1
> +#
> +# To just view the diff clang-format would generate:
> +# $> git diff -U0 --no-color HEAD^ | clang-format-diff -p1
> +#
> +# NB: clang-format-diff, along with other clang-format related tools,
> +# can be found at: /path/to/llvm-project/clang/tools/clang-format/
> +#
> +#
> +---
> +# BasedOnStyle: GNU
Suggest:
# This file is based on the existing GNU style e.g. BasedOnStyle: GNU.
Otherwise developers will be confused why the directive is commented out.
> +AccessModifierOffset: -2
> +AlignAfterOpenBracket: Align
> +AlignConsecutiveMacros: false
> +AlignConsecutiveAssignments: false
> +AlignConsecutiveBitFields: false
> +AlignConsecutiveDeclarations: false
> +AlignEscapedNewlines: Right
> +AlignOperands: true
> +AlignTrailingComments: true
> +AllowAllArgumentsOnNextLine: true
> +AllowAllParametersOfDeclarationOnNextLine: true
> +AllowShortEnumsOnASingleLine: true
> +AllowShortBlocksOnASingleLine: false
> +AllowShortCaseLabelsOnASingleLine: false
> +AllowShortFunctionsOnASingleLine: All
> +AllowShortLambdasOnASingleLine: All
> +AllowShortIfStatementsOnASingleLine: Never
> +AllowShortLoopsOnASingleLine: false
> +AlwaysBreakAfterDefinitionReturnType: All
> +AlwaysBreakAfterReturnType: AllDefinitions
> +AlwaysBreakBeforeMultilineStrings: false
> +BinPackArguments: true
> +BinPackParameters: true
> +BraceWrapping:
> + AfterCaseLabel: true
> + AfterClass: true
> + AfterControlStatement: true
> + AfterEnum: true
> + AfterFunction: true
> + AfterNamespace: true
> + AfterStruct: true
> + AfterUnion: true
> + AfterExternBlock: true
> + BeforeCatch: true
> + BeforeElse: true
> + BeforeWhile: true
> + IndentBraces: true
> + SplitEmptyFunction: true
> + SplitEmptyRecord: true
> + SplitEmptyNamespace: true
> +BreakBeforeBinaryOperators: All
> +BreakBeforeBraces: GNU
> +BreakBeforeInheritanceComma: false
> +BreakInheritanceList: BeforeColon
> +BreakBeforeTernaryOperators: true
> +BreakStringLiterals: true
> +ColumnLimit: 79
> +CommentPragmas: '^ IWYU pragma:'
> +CompactNamespaces: false
> +ContinuationIndentWidth: 4
> +Cpp11BracedListStyle: false
> +DeriveLineEnding: true
> +DerivePointerAlignment: false
> +DisableFormat: false
> +ExperimentalAutoDetectBinPacking: false
> +FixNamespaceComments: false
> +IncludeBlocks: Preserve
> +IncludeCategories:
> + - Regex: '.*'
> + Priority: 1
OK. Resolves Florian's comment regarding IncludeCategories.
> +IncludeIsMainRegex: '(Test)?$'
> +IndentCaseLabels: false
> +IndentCaseBlocks: false
> +IndentGotoLabels: true
> +IndentWidth: 2
> +IndentPPDirectives: AfterHash
> +IndentExternBlock: AfterExternBlock
> +IndentWrappedFunctionNames: false
> +InsertTrailingCommas: None
> +KeepEmptyLinesAtTheStartOfBlocks: true
> +MacroBlockBegin: ''
> +MacroBlockEnd: ''
> +MaxEmptyLinesToKeep: 1
> +NamespaceIndentation: None
> +PenaltyBreakAssignment: 2
> +PenaltyBreakBeforeFirstCallParameter: 19
> +PenaltyBreakComment: 300
> +PenaltyBreakFirstLessLess: 120
> +PenaltyBreakString: 1000
> +PenaltyExcessCharacter: 1000000
> +PenaltyReturnTypeOnItsOwnLine: 60
> +PointerAlignment: Right
> +ReflowComments: true
> +SortIncludes: false
> +SortUsingDeclarations: true
> +SpaceAfterCStyleCast: true
> +SpaceAfterLogicalNot: false
> +SpaceBeforeAssignmentOperators: true
> +SpaceBeforeCpp11BracedList: false
> +SpaceBeforeCtorInitializerColon: true
> +SpaceBeforeInheritanceColon: true
> +SpaceBeforeParens: Always
> +SpaceBeforeRangeBasedForLoopColon: true
> +SpaceInEmptyBlock: false
> +SpaceInEmptyParentheses: false
> +SpacesBeforeTrailingComments: 1
> +SpacesInAngles: false
> +SpacesInConditionalStatement: false
> +SpacesInContainerLiterals: true
> +SpacesInCStyleCastParentheses: false
> +SpacesInParentheses: false
> +SpacesInSquareBrackets: false
> +SpaceBeforeSquareBrackets: false
> +Standard: Cpp03
OK. Removed StatementMacro use for QT. Resolves Florian's comments in v3.
> +TabWidth: 8
> +UseTab: Always
OK. Resolved Florian's comments in v3.
> +ForEachMacros:
> + - 'FOR_EACH_IMPL'
> + - 'list_for_each'
> + - 'list_for_each_prev'
> + - 'list_for_each_prev_safe'
> +...
OK.
--
Cheers,
Carlos.
next prev parent reply other threads:[~2022-04-04 14:13 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-28 19:12 [PATCH v1] " Noah Goldstein
2022-03-30 0:26 ` Fangrui Song
2022-03-30 1:33 ` Noah Goldstein
2022-03-30 17:02 ` [PATCH v2] " Noah Goldstein
2022-03-30 18:17 ` Fangrui Song
2022-03-30 19:30 ` Noah Goldstein
2022-03-30 19:47 ` Joseph Myers
2022-03-30 20:11 ` Noah Goldstein
2022-03-30 20:16 ` Noah Goldstein
2022-03-30 20:21 ` Joseph Myers
2022-03-30 20:59 ` Andreas Schwab
2022-03-30 19:27 ` [PATCH v3] " Noah Goldstein
2022-03-30 19:59 ` Fangrui Song
2022-03-30 20:01 ` Florian Weimer
2022-03-30 20:09 ` Noah Goldstein
2022-03-30 20:14 ` Florian Weimer
2022-03-30 20:21 ` Noah Goldstein
2022-03-30 20:10 ` [PATCH v4] " Noah Goldstein
2022-03-30 20:24 ` [PATCH v5] " Noah Goldstein
2022-04-04 14:13 ` Carlos O'Donell [this message]
2022-04-04 16:57 ` Noah Goldstein
2022-04-04 16:56 ` [PATCH v6] " Noah Goldstein
2022-04-11 14:18 ` Carlos O'Donell
2022-04-11 15:52 ` Noah Goldstein
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