Use the space freed up by sparc and zaurus to import LLVM.

ok hackroom@

1 files changed, 621 insertions, 0 deletions

diff --git a/gnu/llvm/tools/clang/lib/Format/FormatToken.h b/gnu/llvm/tools/clang/lib/Format/FormatToken.h
new file mode 100644
index 00000000000..b683660f350
--- /dev/null
+++ b/gnu/llvm/tools/clang/lib/Format/FormatToken.h
@@ -0,0 +1,621 @@
+//===--- FormatToken.h - Format C++ code ------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file contains the declaration of the FormatToken, a wrapper
+/// around Token with additional information related to formatting.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_FORMAT_FORMATTOKEN_H
+#define LLVM_CLANG_LIB_FORMAT_FORMATTOKEN_H
+
+#include "clang/Basic/IdentifierTable.h"
+#include "clang/Basic/OperatorPrecedence.h"
+#include "clang/Format/Format.h"
+#include "clang/Lex/Lexer.h"
+#include <memory>
+
+namespace clang {
+namespace format {
+
+#define LIST_TOKEN_TYPES \
+  TYPE(ArrayInitializerLSquare) \
+  TYPE(ArraySubscriptLSquare) \
+  TYPE(AttributeParen) \
+  TYPE(BinaryOperator) \
+  TYPE(BitFieldColon) \
+  TYPE(BlockComment) \
+  TYPE(CastRParen) \
+  TYPE(ConditionalExpr) \
+  TYPE(ConflictAlternative) \
+  TYPE(ConflictEnd) \
+  TYPE(ConflictStart) \
+  TYPE(CtorInitializerColon) \
+  TYPE(CtorInitializerComma) \
+  TYPE(DesignatedInitializerPeriod) \
+  TYPE(DictLiteral) \
+  TYPE(ForEachMacro) \
+  TYPE(FunctionAnnotationRParen) \
+  TYPE(FunctionDeclarationName) \
+  TYPE(FunctionLBrace) \
+  TYPE(FunctionTypeLParen) \
+  TYPE(ImplicitStringLiteral) \
+  TYPE(InheritanceColon) \
+  TYPE(InlineASMBrace) \
+  TYPE(InlineASMColon) \
+  TYPE(JavaAnnotation) \
+  TYPE(JsComputedPropertyName) \
+  TYPE(JsFatArrow) \
+  TYPE(JsTypeColon) \
+  TYPE(JsTypeOptionalQuestion) \
+  TYPE(LambdaArrow) \
+  TYPE(LambdaLSquare) \
+  TYPE(LeadingJavaAnnotation) \
+  TYPE(LineComment) \
+  TYPE(MacroBlockBegin) \
+  TYPE(MacroBlockEnd) \
+  TYPE(ObjCBlockLBrace) \
+  TYPE(ObjCBlockLParen) \
+  TYPE(ObjCDecl) \
+  TYPE(ObjCForIn) \
+  TYPE(ObjCMethodExpr) \
+  TYPE(ObjCMethodSpecifier) \
+  TYPE(ObjCProperty) \
+  TYPE(ObjCStringLiteral) \
+  TYPE(OverloadedOperator) \
+  TYPE(OverloadedOperatorLParen) \
+  TYPE(PointerOrReference) \
+  TYPE(PureVirtualSpecifier) \
+  TYPE(RangeBasedForLoopColon) \
+  TYPE(RegexLiteral) \
+  TYPE(SelectorName) \
+  TYPE(StartOfName) \
+  TYPE(TemplateCloser) \
+  TYPE(TemplateOpener) \
+  TYPE(TemplateString) \
+  TYPE(TrailingAnnotation) \
+  TYPE(TrailingReturnArrow) \
+  TYPE(TrailingUnaryOperator) \
+  TYPE(UnaryOperator) \
+  TYPE(Unknown)
+
+enum TokenType {
+#define TYPE(X) TT_##X,
+LIST_TOKEN_TYPES
+#undef TYPE
+  NUM_TOKEN_TYPES
+};
+
+/// \brief Determines the name of a token type.
+const char *getTokenTypeName(TokenType Type);
+
+// Represents what type of block a set of braces open.
+enum BraceBlockKind { BK_Unknown, BK_Block, BK_BracedInit };
+
+// The packing kind of a function's parameters.
+enum ParameterPackingKind { PPK_BinPacked, PPK_OnePerLine, PPK_Inconclusive };
+
+enum FormatDecision { FD_Unformatted, FD_Continue, FD_Break };
+
+class TokenRole;
+class AnnotatedLine;
+
+/// \brief A wrapper around a \c Token storing information about the
+/// whitespace characters preceding it.
+struct FormatToken {
+  FormatToken() {}
+
+  /// \brief The \c Token.
+  Token Tok;
+
+  /// \brief The number of newlines immediately before the \c Token.
+  ///
+  /// This can be used to determine what the user wrote in the original code
+  /// and thereby e.g. leave an empty line between two function definitions.
+  unsigned NewlinesBefore = 0;
+
+  /// \brief Whether there is at least one unescaped newline before the \c
+  /// Token.
+  bool HasUnescapedNewline = false;
+
+  /// \brief The range of the whitespace immediately preceding the \c Token.
+  SourceRange WhitespaceRange;
+
+  /// \brief The offset just past the last '\n' in this token's leading
+  /// whitespace (relative to \c WhiteSpaceStart). 0 if there is no '\n'.
+  unsigned LastNewlineOffset = 0;
+
+  /// \brief The width of the non-whitespace parts of the token (or its first
+  /// line for multi-line tokens) in columns.
+  /// We need this to correctly measure number of columns a token spans.
+  unsigned ColumnWidth = 0;
+
+  /// \brief Contains the width in columns of the last line of a multi-line
+  /// token.
+  unsigned LastLineColumnWidth = 0;
+
+  /// \brief Whether the token text contains newlines (escaped or not).
+  bool IsMultiline = false;
+
+  /// \brief Indicates that this is the first token.
+  bool IsFirst = false;
+
+  /// \brief Whether there must be a line break before this token.
+  ///
+  /// This happens for example when a preprocessor directive ended directly
+  /// before the token.
+  bool MustBreakBefore = false;
+
+  /// \brief The raw text of the token.
+  ///
+  /// Contains the raw token text without leading whitespace and without leading
+  /// escaped newlines.
+  StringRef TokenText;
+
+  /// \brief Set to \c true if this token is an unterminated literal.
+  bool IsUnterminatedLiteral = 0;
+
+  /// \brief Contains the kind of block if this token is a brace.
+  BraceBlockKind BlockKind = BK_Unknown;
+
+  TokenType Type = TT_Unknown;
+
+  /// \brief The number of spaces that should be inserted before this token.
+  unsigned SpacesRequiredBefore = 0;
+
+  /// \brief \c true if it is allowed to break before this token.
+  bool CanBreakBefore = false;
+
+  /// \brief \c true if this is the ">" of "template<..>".
+  bool ClosesTemplateDeclaration = false;
+
+  /// \brief Number of parameters, if this is "(", "[" or "<".
+  ///
+  /// This is initialized to 1 as we don't need to distinguish functions with
+  /// 0 parameters from functions with 1 parameter. Thus, we can simply count
+  /// the number of commas.
+  unsigned ParameterCount = 0;
+
+  /// \brief Number of parameters that are nested blocks,
+  /// if this is "(", "[" or "<".
+  unsigned BlockParameterCount = 0;
+
+  /// \brief If this is a bracket ("<", "(", "[" or "{"), contains the kind of
+  /// the surrounding bracket.
+  tok::TokenKind ParentBracket = tok::unknown;
+
+  /// \brief A token can have a special role that can carry extra information
+  /// about the token's formatting.
+  std::unique_ptr<TokenRole> Role;
+
+  /// \brief If this is an opening parenthesis, how are the parameters packed?
+  ParameterPackingKind PackingKind = PPK_Inconclusive;
+
+  /// \brief The total length of the unwrapped line up to and including this
+  /// token.
+  unsigned TotalLength = 0;
+
+  /// \brief The original 0-based column of this token, including expanded tabs.
+  /// The configured TabWidth is used as tab width.
+  unsigned OriginalColumn = 0;
+
+  /// \brief The length of following tokens until the next natural split point,
+  /// or the next token that can be broken.
+  unsigned UnbreakableTailLength = 0;
+
+  // FIXME: Come up with a 'cleaner' concept.
+  /// \brief The binding strength of a token. This is a combined value of
+  /// operator precedence, parenthesis nesting, etc.
+  unsigned BindingStrength = 0;
+
+  /// \brief The nesting level of this token, i.e. the number of surrounding (),
+  /// [], {} or <>.
+  unsigned NestingLevel = 0;
+
+  /// \brief Penalty for inserting a line break before this token.
+  unsigned SplitPenalty = 0;
+
+  /// \brief If this is the first ObjC selector name in an ObjC method
+  /// definition or call, this contains the length of the longest name.
+  ///
+  /// This being set to 0 means that the selectors should not be colon-aligned,
+  /// e.g. because several of them are block-type.
+  unsigned LongestObjCSelectorName = 0;
+
+  /// \brief Stores the number of required fake parentheses and the
+  /// corresponding operator precedence.
+  ///
+  /// If multiple fake parentheses start at a token, this vector stores them in
+  /// reverse order, i.e. inner fake parenthesis first.
+  SmallVector<prec::Level, 4> FakeLParens;
+  /// \brief Insert this many fake ) after this token for correct indentation.
+  unsigned FakeRParens = 0;
+
+  /// \brief \c true if this token starts a binary expression, i.e. has at least
+  /// one fake l_paren with a precedence greater than prec::Unknown.
+  bool StartsBinaryExpression = false;
+  /// \brief \c true if this token ends a binary expression.
+  bool EndsBinaryExpression = false;
+
+  /// \brief Is this is an operator (or "."/"->") in a sequence of operators
+  /// with the same precedence, contains the 0-based operator index.
+  unsigned OperatorIndex = 0;
+
+  /// \brief If this is an operator (or "."/"->") in a sequence of operators
+  /// with the same precedence, points to the next operator.
+  FormatToken *NextOperator = nullptr;
+
+  /// \brief Is this token part of a \c DeclStmt defining multiple variables?
+  ///
+  /// Only set if \c Type == \c TT_StartOfName.
+  bool PartOfMultiVariableDeclStmt = false;
+
+  /// \brief If this is a bracket, this points to the matching one.
+  FormatToken *MatchingParen = nullptr;
+
+  /// \brief The previous token in the unwrapped line.
+  FormatToken *Previous = nullptr;
+
+  /// \brief The next token in the unwrapped line.
+  FormatToken *Next = nullptr;
+
+  /// \brief If this token starts a block, this contains all the unwrapped lines
+  /// in it.
+  SmallVector<AnnotatedLine *, 1> Children;
+
+  /// \brief Stores the formatting decision for the token once it was made.
+  FormatDecision Decision = FD_Unformatted;
+
+  /// \brief If \c true, this token has been fully formatted (indented and
+  /// potentially re-formatted inside), and we do not allow further formatting
+  /// changes.
+  bool Finalized = false;
+
+  bool is(tok::TokenKind Kind) const { return Tok.is(Kind); }
+  bool is(TokenType TT) const { return Type == TT; }
+  bool is(const IdentifierInfo *II) const {
+    return II && II == Tok.getIdentifierInfo();
+  }
+  bool is(tok::PPKeywordKind Kind) const {
+    return Tok.getIdentifierInfo() &&
+           Tok.getIdentifierInfo()->getPPKeywordID() == Kind;
+  }
+  template <typename A, typename B> bool isOneOf(A K1, B K2) const {
+    return is(K1) || is(K2);
+  }
+  template <typename A, typename B, typename... Ts>
+  bool isOneOf(A K1, B K2, Ts... Ks) const {
+    return is(K1) || isOneOf(K2, Ks...);
+  }
+  template <typename T> bool isNot(T Kind) const { return !is(Kind); }
+
+  bool isStringLiteral() const { return tok::isStringLiteral(Tok.getKind()); }
+
+  bool isObjCAtKeyword(tok::ObjCKeywordKind Kind) const {
+    return Tok.isObjCAtKeyword(Kind);
+  }
+
+  bool isAccessSpecifier(bool ColonRequired = true) const {
+    return isOneOf(tok::kw_public, tok::kw_protected, tok::kw_private) &&
+           (!ColonRequired || (Next && Next->is(tok::colon)));
+  }
+
+  /// \brief Determine whether the token is a simple-type-specifier.
+  bool isSimpleTypeSpecifier() const;
+
+  bool isObjCAccessSpecifier() const {
+    return is(tok::at) && Next && (Next->isObjCAtKeyword(tok::objc_public) ||
+                                   Next->isObjCAtKeyword(tok::objc_protected) ||
+                                   Next->isObjCAtKeyword(tok::objc_package) ||
+                                   Next->isObjCAtKeyword(tok::objc_private));
+  }
+
+  /// \brief Returns whether \p Tok is ([{ or a template opening <.
+  bool opensScope() const {
+    return isOneOf(tok::l_paren, tok::l_brace, tok::l_square,
+                   TT_TemplateOpener);
+  }
+  /// \brief Returns whether \p Tok is )]} or a template closing >.
+  bool closesScope() const {
+    return isOneOf(tok::r_paren, tok::r_brace, tok::r_square,
+                   TT_TemplateCloser);
+  }
+
+  /// \brief Returns \c true if this is a "." or "->" accessing a member.
+  bool isMemberAccess() const {
+    return isOneOf(tok::arrow, tok::period, tok::arrowstar) &&
+           !isOneOf(TT_DesignatedInitializerPeriod, TT_TrailingReturnArrow,
+                    TT_LambdaArrow);
+  }
+
+  bool isUnaryOperator() const {
+    switch (Tok.getKind()) {
+    case tok::plus:
+    case tok::plusplus:
+    case tok::minus:
+    case tok::minusminus:
+    case tok::exclaim:
+    case tok::tilde:
+    case tok::kw_sizeof:
+    case tok::kw_alignof:
+      return true;
+    default:
+      return false;
+    }
+  }
+
+  bool isBinaryOperator() const {
+    // Comma is a binary operator, but does not behave as such wrt. formatting.
+    return getPrecedence() > prec::Comma;
+  }
+
+  bool isTrailingComment() const {
+    return is(tok::comment) &&
+           (is(TT_LineComment) || !Next || Next->NewlinesBefore > 0);
+  }
+
+  /// \brief Returns \c true if this is a keyword that can be used
+  /// like a function call (e.g. sizeof, typeid, ...).
+  bool isFunctionLikeKeyword() const {
+    switch (Tok.getKind()) {
+    case tok::kw_throw:
+    case tok::kw_typeid:
+    case tok::kw_return:
+    case tok::kw_sizeof:
+    case tok::kw_alignof:
+    case tok::kw_alignas:
+    case tok::kw_decltype:
+    case tok::kw_noexcept:
+    case tok::kw_static_assert:
+    case tok::kw___attribute:
+      return true;
+    default:
+      return false;
+    }
+  }
+
+  /// \brief Returns actual token start location without leading escaped
+  /// newlines and whitespace.
+  ///
+  /// This can be different to Tok.getLocation(), which includes leading escaped
+  /// newlines.
+  SourceLocation getStartOfNonWhitespace() const {
+    return WhitespaceRange.getEnd();
+  }
+
+  prec::Level getPrecedence() const {
+    return getBinOpPrecedence(Tok.getKind(), true, true);
+  }
+
+  /// \brief Returns the previous token ignoring comments.
+  FormatToken *getPreviousNonComment() const {
+    FormatToken *Tok = Previous;
+    while (Tok && Tok->is(tok::comment))
+      Tok = Tok->Previous;
+    return Tok;
+  }
+
+  /// \brief Returns the next token ignoring comments.
+  const FormatToken *getNextNonComment() const {
+    const FormatToken *Tok = Next;
+    while (Tok && Tok->is(tok::comment))
+      Tok = Tok->Next;
+    return Tok;
+  }
+
+  /// \brief Returns \c true if this tokens starts a block-type list, i.e. a
+  /// list that should be indented with a block indent.
+  bool opensBlockOrBlockTypeList(const FormatStyle &Style) const {
+    return is(TT_ArrayInitializerLSquare) ||
+           (is(tok::l_brace) &&
+            (BlockKind == BK_Block || is(TT_DictLiteral) ||
+             (!Style.Cpp11BracedListStyle && NestingLevel == 0)));
+  }
+
+  /// \brief Same as opensBlockOrBlockTypeList, but for the closing token.
+  bool closesBlockOrBlockTypeList(const FormatStyle &Style) const {
+    return MatchingParen && MatchingParen->opensBlockOrBlockTypeList(Style);
+  }
+
+private:
+  // Disallow copying.
+  FormatToken(const FormatToken &) = delete;
+  void operator=(const FormatToken &) = delete;
+};
+
+class ContinuationIndenter;
+struct LineState;
+
+class TokenRole {
+public:
+  TokenRole(const FormatStyle &Style) : Style(Style) {}
+  virtual ~TokenRole();
+
+  /// \brief After the \c TokenAnnotator has finished annotating all the tokens,
+  /// this function precomputes required information for formatting.
+  virtual void precomputeFormattingInfos(const FormatToken *Token);
+
+  /// \brief Apply the special formatting that the given role demands.
+  ///
+  /// Assumes that the token having this role is already formatted.
+  ///
+  /// Continues formatting from \p State leaving indentation to \p Indenter and
+  /// returns the total penalty that this formatting incurs.
+  virtual unsigned formatFromToken(LineState &State,
+                                   ContinuationIndenter *Indenter,
+                                   bool DryRun) {
+    return 0;
+  }
+
+  /// \brief Same as \c formatFromToken, but assumes that the first token has
+  /// already been set thereby deciding on the first line break.
+  virtual unsigned formatAfterToken(LineState &State,
+                                    ContinuationIndenter *Indenter,
+                                    bool DryRun) {
+    return 0;
+  }
+
+  /// \brief Notifies the \c Role that a comma was found.
+  virtual void CommaFound(const FormatToken *Token) {}
+
+protected:
+  const FormatStyle &Style;
+};
+
+class CommaSeparatedList : public TokenRole {
+public:
+  CommaSeparatedList(const FormatStyle &Style)
+      : TokenRole(Style), HasNestedBracedList(false) {}
+
+  void precomputeFormattingInfos(const FormatToken *Token) override;
+
+  unsigned formatAfterToken(LineState &State, ContinuationIndenter *Indenter,
+                            bool DryRun) override;
+
+  unsigned formatFromToken(LineState &State, ContinuationIndenter *Indenter,
+                           bool DryRun) override;
+
+  /// \brief Adds \p Token as the next comma to the \c CommaSeparated list.
+  void CommaFound(const FormatToken *Token) override {
+    Commas.push_back(Token);
+  }
+
+private:
+  /// \brief A struct that holds information on how to format a given list with
+  /// a specific number of columns.
+  struct ColumnFormat {
+    /// \brief The number of columns to use.
+    unsigned Columns;
+
+    /// \brief The total width in characters.
+    unsigned TotalWidth;
+
+    /// \brief The number of lines required for this format.
+    unsigned LineCount;
+
+    /// \brief The size of each column in characters.
+    SmallVector<unsigned, 8> ColumnSizes;
+  };
+
+  /// \brief Calculate which \c ColumnFormat fits best into
+  /// \p RemainingCharacters.
+  const ColumnFormat *getColumnFormat(unsigned RemainingCharacters) const;
+
+  /// \brief The ordered \c FormatTokens making up the commas of this list.
+  SmallVector<const FormatToken *, 8> Commas;
+
+  /// \brief The length of each of the list's items in characters including the
+  /// trailing comma.
+  SmallVector<unsigned, 8> ItemLengths;
+
+  /// \brief Precomputed formats that can be used for this list.
+  SmallVector<ColumnFormat, 4> Formats;
+
+  bool HasNestedBracedList;
+};
+
+/// \brief Encapsulates keywords that are context sensitive or for languages not
+/// properly supported by Clang's lexer.
+struct AdditionalKeywords {
+  AdditionalKeywords(IdentifierTable &IdentTable) {
+    kw_final = &IdentTable.get("final");
+    kw_override = &IdentTable.get("override");
+    kw_in = &IdentTable.get("in");
+    kw_CF_ENUM = &IdentTable.get("CF_ENUM");
+    kw_CF_OPTIONS = &IdentTable.get("CF_OPTIONS");
+    kw_NS_ENUM = &IdentTable.get("NS_ENUM");
+    kw_NS_OPTIONS = &IdentTable.get("NS_OPTIONS");
+
+    kw_finally = &IdentTable.get("finally");
+    kw_function = &IdentTable.get("function");
+    kw_import = &IdentTable.get("import");
+    kw_is = &IdentTable.get("is");
+    kw_let = &IdentTable.get("let");
+    kw_var = &IdentTable.get("var");
+
+    kw_abstract = &IdentTable.get("abstract");
+    kw_assert = &IdentTable.get("assert");
+    kw_extends = &IdentTable.get("extends");
+    kw_implements = &IdentTable.get("implements");
+    kw_instanceof = &IdentTable.get("instanceof");
+    kw_interface = &IdentTable.get("interface");
+    kw_native = &IdentTable.get("native");
+    kw_package = &IdentTable.get("package");
+    kw_synchronized = &IdentTable.get("synchronized");
+    kw_throws = &IdentTable.get("throws");
+    kw___except = &IdentTable.get("__except");
+
+    kw_mark = &IdentTable.get("mark");
+
+    kw_extend = &IdentTable.get("extend");
+    kw_option = &IdentTable.get("option");
+    kw_optional = &IdentTable.get("optional");
+    kw_repeated = &IdentTable.get("repeated");
+    kw_required = &IdentTable.get("required");
+    kw_returns = &IdentTable.get("returns");
+
+    kw_signals = &IdentTable.get("signals");
+    kw_qsignals = &IdentTable.get("Q_SIGNALS");
+    kw_slots = &IdentTable.get("slots");
+    kw_qslots = &IdentTable.get("Q_SLOTS");
+  }
+
+  // Context sensitive keywords.
+  IdentifierInfo *kw_final;
+  IdentifierInfo *kw_override;
+  IdentifierInfo *kw_in;
+  IdentifierInfo *kw_CF_ENUM;
+  IdentifierInfo *kw_CF_OPTIONS;
+  IdentifierInfo *kw_NS_ENUM;
+  IdentifierInfo *kw_NS_OPTIONS;
+  IdentifierInfo *kw___except;
+
+  // JavaScript keywords.
+  IdentifierInfo *kw_finally;
+  IdentifierInfo *kw_function;
+  IdentifierInfo *kw_import;
+  IdentifierInfo *kw_is;
+  IdentifierInfo *kw_let;
+  IdentifierInfo *kw_var;
+
+  // Java keywords.
+  IdentifierInfo *kw_abstract;
+  IdentifierInfo *kw_assert;
+  IdentifierInfo *kw_extends;
+  IdentifierInfo *kw_implements;
+  IdentifierInfo *kw_instanceof;
+  IdentifierInfo *kw_interface;
+  IdentifierInfo *kw_native;
+  IdentifierInfo *kw_package;
+  IdentifierInfo *kw_synchronized;
+  IdentifierInfo *kw_throws;
+
+  // Pragma keywords.
+  IdentifierInfo *kw_mark;
+
+  // Proto keywords.
+  IdentifierInfo *kw_extend;
+  IdentifierInfo *kw_option;
+  IdentifierInfo *kw_optional;
+  IdentifierInfo *kw_repeated;
+  IdentifierInfo *kw_required;
+  IdentifierInfo *kw_returns;
+
+  // QT keywords.
+  IdentifierInfo *kw_signals;
+  IdentifierInfo *kw_qsignals;
+  IdentifierInfo *kw_slots;
+  IdentifierInfo *kw_qslots;
+};
+
+} // namespace format
+} // namespace clang
+
+#endif