CommentCommandTraits.h revision 6ebf09130479bc7605aa09a3e6c4dc2ba3513495 
1//===--- CommentCommandTraits.h - Comment command properties ----*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10//  This file defines the class that provides information about comment
11//  commands.
12//
13//===----------------------------------------------------------------------===//
14
15
16#ifndef LLVM_CLANG_AST_COMMENT_COMMAND_TRAITS_H
17#define LLVM_CLANG_AST_COMMENT_COMMAND_TRAITS_H
18
19#include "clang/Basic/CommentOptions.h"
20#include "clang/Basic/LLVM.h"
21#include "llvm/ADT/SmallVector.h"
22#include "llvm/ADT/StringRef.h"
23#include "llvm/Support/Allocator.h"
24#include "llvm/Support/ErrorHandling.h"
25
26namespace clang {
27namespace comments {
28
29/// \brief Information about a single command.
30///
31/// When reordering, adding or removing members please update the corresponding
32/// TableGen backend.
33struct CommandInfo {
34  unsigned getID() const {
35    return ID;
36  }
37
38  const char *Name;
39
40  /// Name of the command that ends the verbatim block.
41  const char *EndCommandName;
42
43  unsigned ID : 8;
44
45  /// Number of word-like arguments for a given block command, except for
46  /// \\param and \\tparam commands -- these have special argument parsers.
47  unsigned NumArgs : 4;
48
49  /// True if this command is a inline command (of any kind).
50  unsigned IsInlineCommand : 1;
51
52  /// True if this command is a block command (of any kind).
53  unsigned IsBlockCommand : 1;
54
55  /// True if this command is introducing a brief documentation
56  /// paragraph (\\brief or an alias).
57  unsigned IsBriefCommand : 1;
58
59  /// True if this command is \\returns or an alias.
60  unsigned IsReturnsCommand : 1;
61
62  /// True if this command is introducing documentation for a function
63  /// parameter (\\param or an alias).
64  unsigned IsParamCommand : 1;
65
66  /// True if this command is introducing documentation for
67  /// a template parameter (\\tparam or an alias).
68  unsigned IsTParamCommand : 1;
69
70  /// True if this command is \\deprecated or an alias.
71  unsigned IsDeprecatedCommand : 1;
72
73  /// \brief True if this is a \\headerfile-like command.
74  unsigned IsHeaderfileCommand : 1;
75
76  /// True if we don't want to warn about this command being passed an empty
77  /// paragraph.  Meaningful only for block commands.
78  unsigned IsEmptyParagraphAllowed : 1;
79
80  /// \brief True if this command is a verbatim-like block command.
81  ///
82  /// A verbatim-like block command eats every character (except line starting
83  /// decorations) until matching end command is seen or comment end is hit.
84  unsigned IsVerbatimBlockCommand : 1;
85
86  /// \brief True if this command is an end command for a verbatim-like block.
87  unsigned IsVerbatimBlockEndCommand : 1;
88
89  /// \brief True if this command is a verbatim line command.
90  ///
91  /// A verbatim-like line command eats everything until a newline is seen or
92  /// comment end is hit.
93  unsigned IsVerbatimLineCommand : 1;
94
95  /// \brief True if this command contains a declaration for the entity being
96  /// documented.
97  ///
98  /// For example:
99  /// \code
100  ///   \fn void f(int a);
101  /// \endcode
102  unsigned IsDeclarationCommand : 1;
103
104  /// \brief True if this command is unknown.  This \c CommandInfo object was
105  /// created during parsing.
106  unsigned IsUnknownCommand : 1;
107};
108
109/// This class provides information about commands that can be used
110/// in comments.
111class CommandTraits {
112public:
113  enum KnownCommandIDs {
114#define COMMENT_COMMAND(NAME) KCI_##NAME,
115#include "clang/AST/CommentCommandList.inc"
116#undef COMMENT_COMMAND
117    KCI_Last
118  };
119
120  CommandTraits(llvm::BumpPtrAllocator &Allocator,
121                const CommentOptions &CommentOptions);
122
123  void registerCommentOptions(const CommentOptions &CommentOptions);
124
125  /// \returns a CommandInfo object for a given command name or
126  /// NULL if no CommandInfo object exists for this command.
127  const CommandInfo *getCommandInfoOrNULL(StringRef Name) const;
128
129  const CommandInfo *getCommandInfo(StringRef Name) const {
130    if (const CommandInfo *Info = getCommandInfoOrNULL(Name))
131      return Info;
132    llvm_unreachable("the command should be known");
133  }
134
135  const CommandInfo *getCommandInfo(unsigned CommandID) const;
136
137  const CommandInfo *registerUnknownCommand(StringRef CommandName);
138
139  const CommandInfo *registerBlockCommand(StringRef CommandName);
140
141  /// \returns a CommandInfo object for a given command name or
142  /// NULL if \c Name is not a builtin command.
143  static const CommandInfo *getBuiltinCommandInfo(StringRef Name);
144
145  /// \returns a CommandInfo object for a given command ID or
146  /// NULL if \c CommandID is not a builtin command.
147  static const CommandInfo *getBuiltinCommandInfo(unsigned CommandID);
148
149private:
150  CommandTraits(const CommandTraits &) LLVM_DELETED_FUNCTION;
151  void operator=(const CommandTraits &) LLVM_DELETED_FUNCTION;
152
153  const CommandInfo *getRegisteredCommandInfo(StringRef Name) const;
154  const CommandInfo *getRegisteredCommandInfo(unsigned CommandID) const;
155
156  CommandInfo *createCommandInfoWithName(StringRef CommandName);
157
158  unsigned NextID;
159
160  /// Allocator for CommandInfo objects.
161  llvm::BumpPtrAllocator &Allocator;
162
163  SmallVector<CommandInfo *, 4> RegisteredCommands;
164};
165
166} // end namespace comments
167} // end namespace clang
168
169#endif
170
171