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| //===--- RawCommentList.h - Classes for processing raw comments -*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_RAWCOMMENTLIST_H
#define LLVM_CLANG_AST_RAWCOMMENTLIST_H
#include "clang/Basic/CommentOptions.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include <map>
namespace clang {
class ASTContext;
class ASTReader;
class Decl;
class Preprocessor;
namespace comments {
class FullComment;
} // end namespace comments
class RawComment {
public:
enum CommentKind {
RCK_Invalid, ///< Invalid comment
RCK_OrdinaryBCPL, ///< Any normal BCPL comments
RCK_OrdinaryC, ///< Any normal C comment
RCK_BCPLSlash, ///< \code /// stuff \endcode
RCK_BCPLExcl, ///< \code //! stuff \endcode
RCK_JavaDoc, ///< \code /** stuff */ \endcode
RCK_Qt, ///< \code /*! stuff */ \endcode, also used by HeaderDoc
RCK_Merged ///< Two or more documentation comments merged together
};
RawComment() : Kind(RCK_Invalid), IsAlmostTrailingComment(false) { }
RawComment(const SourceManager &SourceMgr, SourceRange SR,
const CommentOptions &CommentOpts, bool Merged);
CommentKind getKind() const LLVM_READONLY {
return (CommentKind) Kind;
}
bool isInvalid() const LLVM_READONLY {
return Kind == RCK_Invalid;
}
bool isMerged() const LLVM_READONLY {
return Kind == RCK_Merged;
}
/// Is this comment attached to any declaration?
bool isAttached() const LLVM_READONLY {
return IsAttached;
}
void setAttached() {
IsAttached = true;
}
/// Returns true if it is a comment that should be put after a member:
/// \code ///< stuff \endcode
/// \code //!< stuff \endcode
/// \code /**< stuff */ \endcode
/// \code /*!< stuff */ \endcode
bool isTrailingComment() const LLVM_READONLY {
return IsTrailingComment;
}
/// Returns true if it is a probable typo:
/// \code //< stuff \endcode
/// \code /*< stuff */ \endcode
bool isAlmostTrailingComment() const LLVM_READONLY {
return IsAlmostTrailingComment;
}
/// Returns true if this comment is not a documentation comment.
bool isOrdinary() const LLVM_READONLY {
return ((Kind == RCK_OrdinaryBCPL) || (Kind == RCK_OrdinaryC));
}
/// Returns true if this comment any kind of a documentation comment.
bool isDocumentation() const LLVM_READONLY {
return !isInvalid() && !isOrdinary();
}
/// Returns raw comment text with comment markers.
StringRef getRawText(const SourceManager &SourceMgr) const {
if (RawTextValid)
return RawText;
RawText = getRawTextSlow(SourceMgr);
RawTextValid = true;
return RawText;
}
SourceRange getSourceRange() const LLVM_READONLY { return Range; }
SourceLocation getBeginLoc() const LLVM_READONLY { return Range.getBegin(); }
SourceLocation getEndLoc() const LLVM_READONLY { return Range.getEnd(); }
const char *getBriefText(const ASTContext &Context) const {
if (BriefTextValid)
return BriefText;
return extractBriefText(Context);
}
/// Returns sanitized comment text, suitable for presentation in editor UIs.
/// E.g. will transform:
/// // This is a long multiline comment.
/// // Parts of it might be indented.
/// /* The comments styles might be mixed. */
/// into
/// "This is a long multiline comment.\n"
/// " Parts of it might be indented.\n"
/// "The comments styles might be mixed."
/// Also removes leading indentation and sanitizes some common cases:
/// /* This is a first line.
/// * This is a second line. It is indented.
/// * This is a third line. */
/// and
/// /* This is a first line.
/// This is a second line. It is indented.
/// This is a third line. */
/// will both turn into:
/// "This is a first line.\n"
/// " This is a second line. It is indented.\n"
/// "This is a third line."
std::string getFormattedText(const SourceManager &SourceMgr,
DiagnosticsEngine &Diags) const;
/// Parse the comment, assuming it is attached to decl \c D.
comments::FullComment *parse(const ASTContext &Context,
const Preprocessor *PP, const Decl *D) const;
private:
SourceRange Range;
mutable StringRef RawText;
mutable const char *BriefText;
mutable bool RawTextValid : 1; ///< True if RawText is valid
mutable bool BriefTextValid : 1; ///< True if BriefText is valid
unsigned Kind : 3;
/// True if comment is attached to a declaration in ASTContext.
bool IsAttached : 1;
bool IsTrailingComment : 1;
bool IsAlmostTrailingComment : 1;
/// Constructor for AST deserialization.
RawComment(SourceRange SR, CommentKind K, bool IsTrailingComment,
bool IsAlmostTrailingComment) :
Range(SR), RawTextValid(false), BriefTextValid(false), Kind(K),
IsAttached(false), IsTrailingComment(IsTrailingComment),
IsAlmostTrailingComment(IsAlmostTrailingComment)
{ }
StringRef getRawTextSlow(const SourceManager &SourceMgr) const;
const char *extractBriefText(const ASTContext &Context) const;
friend class ASTReader;
};
/// Compare comments' source locations.
template<>
class BeforeThanCompare<RawComment> {
const SourceManager &SM;
public:
explicit BeforeThanCompare(const SourceManager &SM) : SM(SM) { }
bool operator()(const RawComment &LHS, const RawComment &RHS) {
return SM.isBeforeInTranslationUnit(LHS.getBeginLoc(), RHS.getBeginLoc());
}
bool operator()(const RawComment *LHS, const RawComment *RHS) {
return operator()(*LHS, *RHS);
}
};
/// This class represents all comments included in the translation unit,
/// sorted in order of appearance in the translation unit.
class RawCommentList {
public:
RawCommentList(SourceManager &SourceMgr) : SourceMgr(SourceMgr) {}
void addComment(const RawComment &RC, const CommentOptions &CommentOpts,
llvm::BumpPtrAllocator &Allocator);
/// \returns A mapping from an offset of the start of the comment to the
/// comment itself, or nullptr in case there are no comments in \p File.
const std::map<unsigned, RawComment *> *getCommentsInFile(FileID File) const;
bool empty() const;
unsigned getCommentBeginLine(RawComment *C, FileID File,
unsigned Offset) const;
unsigned getCommentEndOffset(RawComment *C) const;
private:
SourceManager &SourceMgr;
// mapping: FileId -> comment begin offset -> comment
llvm::DenseMap<FileID, std::map<unsigned, RawComment *>> OrderedComments;
mutable llvm::DenseMap<RawComment *, unsigned> CommentBeginLine;
mutable llvm::DenseMap<RawComment *, unsigned> CommentEndOffset;
friend class ASTReader;
friend class ASTWriter;
};
} // end namespace clang
#endif
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