#include "ContinuationIndenter.h"
#include "FormatToken.h"
#include "clang/Format/Format.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Debug.h"
#include <climits>
namespace clang {
namespace format {
const char *getTokenTypeName(TokenType Type) {
static const char *const TokNames[] = {
#define TYPE(X) #X,
LIST_TOKEN_TYPES
#undef TYPE
nullptr
};
if (Type < NUM_TOKEN_TYPES)
return TokNames[Type];
llvm_unreachable("unknown TokenType");
return nullptr;
}
bool FormatToken::isSimpleTypeSpecifier() const {
switch (Tok.getKind()) {
case tok::kw_short:
case tok::kw_long:
case tok::kw___int64:
case tok::kw___int128:
case tok::kw_signed:
case tok::kw_unsigned:
case tok::kw_void:
case tok::kw_char:
case tok::kw_int:
case tok::kw_half:
case tok::kw_float:
case tok::kw_double:
case tok::kw_wchar_t:
case tok::kw_bool:
case tok::kw___underlying_type:
case tok::annot_typename:
case tok::kw_char16_t:
case tok::kw_char32_t:
case tok::kw_typeof:
case tok::kw_decltype:
return true;
default:
return false;
}
}
TokenRole::~TokenRole() {}
void TokenRole::precomputeFormattingInfos(const FormatToken *Token) {}
unsigned CommaSeparatedList::formatAfterToken(LineState &State,
ContinuationIndenter *Indenter,
bool DryRun) {
if (State.NextToken == nullptr || !State.NextToken->Previous)
return 0;
const FormatToken *LBrace =
State.NextToken->Previous->getPreviousNonComment();
if (!LBrace || !LBrace->isOneOf(tok::l_brace, TT_ArrayInitializerLSquare) ||
LBrace->BlockKind == BK_Block || LBrace->Type == TT_DictLiteral ||
LBrace->Next->Type == TT_DesignatedInitializerPeriod)
return 0;
unsigned RemainingCodePoints =
Style.ColumnLimit - State.Column + State.NextToken->Previous->ColumnWidth;
const ColumnFormat *Format = getColumnFormat(RemainingCodePoints);
if (!Format)
return 10000;
unsigned Penalty = 0;
unsigned Column = 0;
unsigned Item = 0;
while (State.NextToken != LBrace->MatchingParen) {
bool NewLine = false;
unsigned ExtraSpaces = 0;
if (Item < Commas.size() && State.NextToken->Previous == Commas[Item]) {
if (!State.NextToken->isTrailingComment()) {
ExtraSpaces += Format->ColumnSizes[Column] - ItemLengths[Item];
++Column;
}
++Item;
}
if (Column == Format->Columns || State.NextToken->MustBreakBefore) {
Column = 0;
NewLine = true;
}
Penalty += Indenter->addTokenToState(State, NewLine, DryRun, ExtraSpaces);
}
return Penalty;
}
unsigned CommaSeparatedList::formatFromToken(LineState &State,
ContinuationIndenter *Indenter,
bool DryRun) {
if (HasNestedBracedList)
State.Stack.back().AvoidBinPacking = true;
return 0;
}
static unsigned CodePointsBetween(const FormatToken *Begin,
const FormatToken *End) {
assert(End->TotalLength >= Begin->TotalLength);
return End->TotalLength - Begin->TotalLength + Begin->ColumnWidth;
}
void CommaSeparatedList::precomputeFormattingInfos(const FormatToken *Token) {
if (!Token->MatchingParen ||
!Token->isOneOf(tok::l_brace, TT_ArrayInitializerLSquare))
return;
if (Style.Cpp11BracedListStyle && !Style.BinPackArguments &&
Commas.size() < 19)
return;
if (Token->is(TT_ArrayInitializerLSquare) && Commas.size() < 19)
return;
if (Style.AlignAfterOpenBracket == FormatStyle::BAS_DontAlign)
return;
FormatToken *ItemBegin = Token->Next;
while (ItemBegin->isTrailingComment())
ItemBegin = ItemBegin->Next;
SmallVector<bool, 8> MustBreakBeforeItem;
SmallVector<unsigned, 8> EndOfLineItemLength;
bool HasSeparatingComment = false;
for (unsigned i = 0, e = Commas.size() + 1; i != e; ++i) {
while (ItemBegin->HasUnescapedNewline && ItemBegin->isTrailingComment()) {
ItemBegin = ItemBegin->Next;
HasSeparatingComment = i > 0;
}
MustBreakBeforeItem.push_back(ItemBegin->MustBreakBefore);
if (ItemBegin->is(tok::l_brace))
HasNestedBracedList = true;
const FormatToken *ItemEnd = nullptr;
if (i == Commas.size()) {
ItemEnd = Token->MatchingParen;
const FormatToken *NonCommentEnd = ItemEnd->getPreviousNonComment();
ItemLengths.push_back(CodePointsBetween(ItemBegin, NonCommentEnd));
if (Style.Cpp11BracedListStyle &&
!ItemEnd->Previous->isTrailingComment()) {
while (ItemEnd->Next && !ItemEnd->Next->CanBreakBefore)
ItemEnd = ItemEnd->Next;
} else {
ItemEnd = Token->MatchingParen->Previous;
}
} else {
ItemEnd = Commas[i];
ItemLengths.push_back(CodePointsBetween(ItemBegin, ItemEnd));
if (ItemEnd->Next && !ItemEnd->Next->HasUnescapedNewline &&
ItemEnd->Next->isTrailingComment())
ItemEnd = ItemEnd->Next;
}
EndOfLineItemLength.push_back(CodePointsBetween(ItemBegin, ItemEnd));
if (ItemEnd->getNextNonComment() == Token->MatchingParen)
break;
ItemBegin = ItemEnd->Next;
}
if (Commas.size() < 5 || HasSeparatingComment)
return;
if (Token->NestingLevel != 0 && Token->is(tok::l_brace) && Commas.size() < 19)
return;
unsigned MaxItems = Style.ColumnLimit / 3;
std::vector<unsigned> MinSizeInColumn;
MinSizeInColumn.reserve(MaxItems);
for (unsigned Columns = 1; Columns <= MaxItems; ++Columns) {
ColumnFormat Format;
Format.Columns = Columns;
Format.ColumnSizes.resize(Columns);
MinSizeInColumn.assign(Columns, UINT_MAX);
Format.LineCount = 1;
bool HasRowWithSufficientColumns = false;
unsigned Column = 0;
for (unsigned i = 0, e = ItemLengths.size(); i != e; ++i) {
assert(i < MustBreakBeforeItem.size());
if (MustBreakBeforeItem[i] || Column == Columns) {
++Format.LineCount;
Column = 0;
}
if (Column == Columns - 1)
HasRowWithSufficientColumns = true;
unsigned Length =
(Column == Columns - 1) ? EndOfLineItemLength[i] : ItemLengths[i];
Format.ColumnSizes[Column] = std::max(Format.ColumnSizes[Column], Length);
MinSizeInColumn[Column] = std::min(MinSizeInColumn[Column], Length);
++Column;
}
if (!HasRowWithSufficientColumns)
break;
Format.TotalWidth = Columns - 1;
for (unsigned i = 0; i < Columns; ++i)
Format.TotalWidth += Format.ColumnSizes[i];
if ([&] {
for (unsigned i = 0; i < Columns - 1; ++i)
if (Format.ColumnSizes[i] - MinSizeInColumn[i] > 10)
return true;
return false;
}())
continue;
if (Format.TotalWidth > Style.ColumnLimit)
continue;
Formats.push_back(Format);
}
}
const CommaSeparatedList::ColumnFormat *
CommaSeparatedList::getColumnFormat(unsigned RemainingCharacters) const {
const ColumnFormat *BestFormat = nullptr;
for (SmallVector<ColumnFormat, 4>::const_reverse_iterator
I = Formats.rbegin(),
E = Formats.rend();
I != E; ++I) {
if (I->TotalWidth <= RemainingCharacters) {
if (BestFormat && I->LineCount > BestFormat->LineCount)
break;
BestFormat = &*I;
}
}
return BestFormat;
}
} }