C++ Mangler::appendSymbol方法代码示例

//.........这里部分代码省略.........
      
  //   global ::= 'Wt' protocol-conformance identifier
  case Kind::AssociatedTypeMetadataAccessFunction:
    mangler.append("_TWt");
    mangler.mangleProtocolConformance(getProtocolConformance());
    mangler.mangleIdentifier(getAssociatedType()->getNameStr());
    return mangler.finalize(buffer);

  //   global ::= 'WT' protocol-conformance identifier nominal-type
  case Kind::AssociatedTypeWitnessTableAccessFunction:
    mangler.append("_TWT");
    mangler.mangleProtocolConformance(getProtocolConformance());
    mangler.mangleIdentifier(getAssociatedType()->getNameStr());
    mangler.mangleProtocolDecl(getAssociatedProtocol());
    return mangler.finalize(buffer);

  // For all the following, this rule was imposed above:
  //   global ::= local-marker? entity            // some identifiable thing

  //   entity ::= declaration                     // other declaration
  case Kind::Function:
    // As a special case, functions can have manually mangled names.
    if (auto AsmA = getDecl()->getAttrs().getAttribute<SILGenNameAttr>()) {
      mangler.append(AsmA->Name);
      return mangler.finalize(buffer);
    }

    // Otherwise, fall through into the 'other decl' case.
    SWIFT_FALLTHROUGH;

  case Kind::Other:
    // As a special case, Clang functions and globals don't get mangled at all.
    if (auto clangDecl = getDecl()->getClangDecl()) {
      if (auto namedClangDecl = dyn_cast<clang::DeclaratorDecl>(clangDecl)) {
        if (auto asmLabel = namedClangDecl->getAttr<clang::AsmLabelAttr>()) {
          mangler.append('\01');
          mangler.append(asmLabel->getLabel());
        } else if (namedClangDecl->hasAttr<clang::OverloadableAttr>()) {
          // FIXME: When we can import C++, use Clang's mangler all the time.
          std::string storage;
          llvm::raw_string_ostream SS(storage);
          mangleClangDecl(SS, namedClangDecl, getDecl()->getASTContext());
          mangler.append(SS.str());
        } else {
          mangler.append(namedClangDecl->getName());
        }
        return mangler.finalize(buffer);
      }
    }

    mangler.append("_T");
    if (auto type = dyn_cast<NominalTypeDecl>(getDecl())) {
      mangler.mangleNominalType(type, Mangler::BindGenerics::None);
    } else if (auto ctor = dyn_cast<ConstructorDecl>(getDecl())) {
      // FIXME: Hack. LinkInfo should be able to refer to the allocating
      // constructor rather than inferring it here.
      mangler.mangleConstructorEntity(ctor, /*isAllocating=*/true,
                                      getUncurryLevel());
    } else {
      mangler.mangleEntity(getDecl(), getUncurryLevel());
    }
      return mangler.finalize(buffer);

  // An Objective-C class reference reference. The symbol is private, so
  // the mangling is unimportant; it should just be readable in LLVM IR.
  case Kind::ObjCClassRef: {
    mangler.append("OBJC_CLASS_REF_$_");
    llvm::SmallString<64> tempBuffer;
    StringRef name = cast<ClassDecl>(getDecl())->getObjCRuntimeName(tempBuffer);
    mangler.append(name);
    return mangler.finalize(buffer);
  }

  // An Objective-C class reference;  not a swift mangling.
  case Kind::ObjCClass: {
    llvm::SmallString<64> TempBuffer;
    mangler.append("OBJC_CLASS_$_");
    StringRef Name = cast<ClassDecl>(getDecl())->getObjCRuntimeName(TempBuffer);
    mangler.append(Name);
    return mangler.finalize(buffer);
  }

  // An Objective-C metaclass reference;  not a swift mangling.
  case Kind::ObjCMetaclass: {
    llvm::SmallString<64> TempBuffer;
    mangler.append("OBJC_METACLASS_$_");
    StringRef Name = cast<ClassDecl>(getDecl())->getObjCRuntimeName(TempBuffer);
    mangler.append(Name);
    return mangler.finalize(buffer);
  }

  case Kind::SILFunction:
    mangler.appendSymbol(getSILFunction()->getName());
    return mangler.finalize(buffer);
  case Kind::SILGlobalVariable:
    mangler.appendSymbol(getSILGlobalVariable()->getName());
    return mangler.finalize(buffer);
  }
  llvm_unreachable("bad entity kind!");
}