mnauw created this revision.
mnauw added a reviewer: sammccall.
mnauw added a project: clang-format.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.
mnauw requested review of this revision.
As the example in the comment within the patch shows, the intention of
yet-another-penalty is to discourage some "far-right-cascading" indentation
cases. Of course, mileage and taste may vary, so the default does not affect
current behavior in any way. Likewise, the option may well be named otherwise
(etc).
I realize the patch is likely incomplete (and requires additional test and
documentation changes), but it would first have to be considered useful and
acceptable in the first place.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D90534
Files:
clang/include/clang/Format/Format.h
clang/lib/Format/ContinuationIndenter.cpp
clang/lib/Format/Format.cpp
Index: clang/lib/Format/Format.cpp
===================================================================
--- clang/lib/Format/Format.cpp
+++ clang/lib/Format/Format.cpp
@@ -597,6 +597,8 @@
IO.mapOptional("PenaltyExcessCharacter", Style.PenaltyExcessCharacter);
IO.mapOptional("PenaltyReturnTypeOnItsOwnLine",
Style.PenaltyReturnTypeOnItsOwnLine);
+ IO.mapOptional("PenaltyIndentedWhitespace",
+ Style.PenaltyIndentedWhitespace);
IO.mapOptional("PointerAlignment", Style.PointerAlignment);
IO.mapOptional("RawStringFormats", Style.RawStringFormats);
IO.mapOptional("ReflowComments", Style.ReflowComments);
@@ -975,6 +977,7 @@
LLVMStyle.PenaltyReturnTypeOnItsOwnLine = 60;
LLVMStyle.PenaltyBreakBeforeFirstCallParameter = 19;
LLVMStyle.PenaltyBreakTemplateDeclaration = prec::Relational;
+ LLVMStyle.PenaltyIndentedWhitespace = 0;
LLVMStyle.DisableFormat = false;
LLVMStyle.SortIncludes = true;
Index: clang/lib/Format/ContinuationIndenter.cpp
===================================================================
--- clang/lib/Format/ContinuationIndenter.cpp
+++ clang/lib/Format/ContinuationIndenter.cpp
@@ -783,6 +783,22 @@
State.Column = getNewLineColumn(State);
+ // Add Penalty proportional to amount of whitespace away from FirstColumn
+ // This tends to penalize several lines that are far-right indented,
+ // and prefers a line-break prior to such a block, e.g:
+ //
+ // Constructor() :
+ // member(value), looooooooooooooooong_member(
+ // looooooooooong_call(param_1, param_2, param_3))
+ // would then become
+ // Constructor() :
+ // member(value),
+ // looooooooooooooooong_member(
+ // looooooooooong_call(param_1, param_2, param_3))
+ if (State.Column > State.FirstIndent)
+ Penalty +=
+ Style.PenaltyIndentedWhitespace * (State.Column - State.FirstIndent);
+
// Indent nested blocks relative to this column, unless in a very specific
// JavaScript special case where:
//
Index: clang/include/clang/Format/Format.h
===================================================================
--- clang/include/clang/Format/Format.h
+++ clang/include/clang/Format/Format.h
@@ -1913,6 +1913,9 @@
/// line.
unsigned PenaltyReturnTypeOnItsOwnLine;
+ /// Penalty for whitespace indentation
+ unsigned PenaltyIndentedWhitespace;
+
/// The ``&`` and ``*`` alignment style.
enum PointerAlignmentStyle {
/// Align pointer to the left.
Index: clang/lib/Format/Format.cpp
===================================================================
--- clang/lib/Format/Format.cpp
+++ clang/lib/Format/Format.cpp
@@ -597,6 +597,8 @@
IO.mapOptional("PenaltyExcessCharacter", Style.PenaltyExcessCharacter);
IO.mapOptional("PenaltyReturnTypeOnItsOwnLine",
Style.PenaltyReturnTypeOnItsOwnLine);
+ IO.mapOptional("PenaltyIndentedWhitespace",
+ Style.PenaltyIndentedWhitespace);
IO.mapOptional("PointerAlignment", Style.PointerAlignment);
IO.mapOptional("RawStringFormats", Style.RawStringFormats);
IO.mapOptional("ReflowComments", Style.ReflowComments);
@@ -975,6 +977,7 @@
LLVMStyle.PenaltyReturnTypeOnItsOwnLine = 60;
LLVMStyle.PenaltyBreakBeforeFirstCallParameter = 19;
LLVMStyle.PenaltyBreakTemplateDeclaration = prec::Relational;
+ LLVMStyle.PenaltyIndentedWhitespace = 0;
LLVMStyle.DisableFormat = false;
LLVMStyle.SortIncludes = true;
Index: clang/lib/Format/ContinuationIndenter.cpp
===================================================================
--- clang/lib/Format/ContinuationIndenter.cpp
+++ clang/lib/Format/ContinuationIndenter.cpp
@@ -783,6 +783,22 @@
State.Column = getNewLineColumn(State);
+ // Add Penalty proportional to amount of whitespace away from FirstColumn
+ // This tends to penalize several lines that are far-right indented,
+ // and prefers a line-break prior to such a block, e.g:
+ //
+ // Constructor() :
+ // member(value), looooooooooooooooong_member(
+ // looooooooooong_call(param_1, param_2, param_3))
+ // would then become
+ // Constructor() :
+ // member(value),
+ // looooooooooooooooong_member(
+ // looooooooooong_call(param_1, param_2, param_3))
+ if (State.Column > State.FirstIndent)
+ Penalty +=
+ Style.PenaltyIndentedWhitespace * (State.Column - State.FirstIndent);
+
// Indent nested blocks relative to this column, unless in a very specific
// JavaScript special case where:
//
Index: clang/include/clang/Format/Format.h
===================================================================
--- clang/include/clang/Format/Format.h
+++ clang/include/clang/Format/Format.h
@@ -1913,6 +1913,9 @@
/// line.
unsigned PenaltyReturnTypeOnItsOwnLine;
+ /// Penalty for whitespace indentation
+ unsigned PenaltyIndentedWhitespace;
+
/// The ``&`` and ``*`` alignment style.
enum PointerAlignmentStyle {
/// Align pointer to the left.
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