clang/utils/TableGen/ClangCommentCommandInfoEmitter.cpp

   1 //===-- ClangCommentCommandInfoEmitter.cpp - Generate command lists -------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This tablegen backend emits command lists and efficient matchers for command
  10 // names that are used in documentation comments.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "TableGenBackends.h"
  15
  16 #include "llvm/TableGen/Record.h"
  17 #include "llvm/TableGen/StringMatcher.h"
  18 #include "llvm/TableGen/TableGenBackend.h"
  19 #include <vector>
  20
  21 using namespace llvm;
  22
  23 void clang::EmitClangCommentCommandInfo(const RecordKeeper &Records,
  24                                         raw_ostream &OS) {
  25   emitSourceFileHeader("A list of commands useable in documentation comments",
  26                        OS, Records);
  27
  28   OS << "namespace {\n"
  29         "const CommandInfo Commands[] = {\n";
  30   ArrayRef<const Record *> Tags = Records.getAllDerivedDefinitions("Command");
  31   for (size_t i = 0, e = Tags.size(); i != e; ++i) {
  32     const Record &Tag = *Tags[i];
  33     OS << "  { "
  34        << "\"" << Tag.getValueAsString("Name") << "\", "
  35        << "\"" << Tag.getValueAsString("EndCommandName") << "\", " << i << ", "
  36        << Tag.getValueAsInt("NumArgs") << ", "
  37        << Tag.getValueAsBit("IsInlineCommand") << ", "
  38        << Tag.getValueAsBit("IsBlockCommand") << ", "
  39        << Tag.getValueAsBit("IsBriefCommand") << ", "
  40        << Tag.getValueAsBit("IsReturnsCommand") << ", "
  41        << Tag.getValueAsBit("IsParamCommand") << ", "
  42        << Tag.getValueAsBit("IsTParamCommand") << ", "
  43        << Tag.getValueAsBit("IsThrowsCommand") << ", "
  44        << Tag.getValueAsBit("IsDeprecatedCommand") << ", "
  45        << Tag.getValueAsBit("IsHeaderfileCommand") << ", "
  46        << Tag.getValueAsBit("IsParCommand") << ", "
  47        << Tag.getValueAsBit("IsEmptyParagraphAllowed") << ", "
  48        << Tag.getValueAsBit("IsVerbatimBlockCommand") << ", "
  49        << Tag.getValueAsBit("IsVerbatimBlockEndCommand") << ", "
  50        << Tag.getValueAsBit("IsVerbatimLineCommand") << ", "
  51        << Tag.getValueAsBit("IsDeclarationCommand") << ", "
  52        << Tag.getValueAsBit("IsFunctionDeclarationCommand") << ", "
  53        << Tag.getValueAsBit("IsRecordLikeDetailCommand") << ", "
  54        << Tag.getValueAsBit("IsRecordLikeDeclarationCommand") << ", "
  55        << /* IsUnknownCommand = */ "0" << " }";
  56     if (i + 1 != e)
  57       OS << ",";
  58     OS << "\n";
  59   }
  60   OS << "};\n"
  61         "} // unnamed namespace\n\n";
  62
  63   std::vector<StringMatcher::StringPair> Matches;
  64   for (size_t i = 0, e = Tags.size(); i != e; ++i) {
  65     const Record &Tag = *Tags[i];
  66     std::string Name = Tag.getValueAsString("Name").str();
  67     std::string Return;
  68     raw_string_ostream(Return) << "return &Commands[" << i << "];";
  69     Matches.emplace_back(std::move(Name), std::move(Return));
  70   }
  71
  72   OS << "const CommandInfo *CommandTraits::getBuiltinCommandInfo(\n"
  73      << "                                         StringRef Name) {\n";
  74   StringMatcher("Name", Matches, OS).Emit();
  75   OS << "  return nullptr;\n"
  76      << "}\n\n";
  77 }
  78
  79 static std::string MangleName(StringRef Str) {
  80   std::string Mangled;
  81   for (unsigned i = 0, e = Str.size(); i != e; ++i) {
  82     switch (Str[i]) {
  83     default:
  84       Mangled += Str[i];
  85       break;
  86     case '(':
  87       Mangled += "lparen";
  88       break;
  89     case ')':
  90       Mangled += "rparen";
  91       break;
  92     case '[':
  93       Mangled += "lsquare";
  94       break;
  95     case ']':
  96       Mangled += "rsquare";
  97       break;
  98     case '{':
  99       Mangled += "lbrace";
 100       break;
 101     case '}':
 102       Mangled += "rbrace";
 103       break;
 104     case '$':
 105       Mangled += "dollar";
 106       break;
 107     case '/':
 108       Mangled += "slash";
 109       break;
 110     }
 111   }
 112   return Mangled;
 113 }
 114
 115 void clang::EmitClangCommentCommandList(const RecordKeeper &Records,
 116                                         raw_ostream &OS) {
 117   emitSourceFileHeader("A list of commands useable in documentation comments",
 118                        OS, Records);
 119
 120   OS << "#ifndef COMMENT_COMMAND\n"
 121      << "#  define COMMENT_COMMAND(NAME)\n"
 122      << "#endif\n";
 123
 124   ArrayRef<const Record *> Tags = Records.getAllDerivedDefinitions("Command");
 125   for (size_t i = 0, e = Tags.size(); i != e; ++i) {
 126     const Record &Tag = *Tags[i];
 127     std::string MangledName = MangleName(Tag.getValueAsString("Name"));
 128
 129     OS << "COMMENT_COMMAND(" << MangledName << ")\n";
 130   }
 131 }