Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 394 insertions, 0 deletions

diff --git a/gnu/llvm/clang/lib/AST/Comment.cpp b/gnu/llvm/clang/lib/AST/Comment.cpp
new file mode 100644
index 00000000000..a02cc9d119f
--- /dev/null
+++ b/gnu/llvm/clang/lib/AST/Comment.cpp
@@ -0,0 +1,394 @@
+//===--- Comment.cpp - Comment AST node implementation --------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/Comment.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/AST/DeclTemplate.h"
+#include "clang/Basic/CharInfo.h"
+#include "llvm/Support/ErrorHandling.h"
+#include <type_traits>
+
+namespace clang {
+namespace comments {
+
+// Check that no comment class has a non-trival destructor. They are allocated
+// with a BumpPtrAllocator and therefore their destructor is not executed.
+#define ABSTRACT_COMMENT(COMMENT)
+#define COMMENT(CLASS, PARENT)                                                 \
+  static_assert(std::is_trivially_destructible<CLASS>::value,                  \
+                #CLASS " should be trivially destructible!");
+#include "clang/AST/CommentNodes.inc"
+#undef COMMENT
+#undef ABSTRACT_COMMENT
+
+// DeclInfo is also allocated with a BumpPtrAllocator.
+static_assert(std::is_trivially_destructible<DeclInfo>::value,
+              "DeclInfo should be trivially destructible!");
+
+const char *Comment::getCommentKindName() const {
+  switch (getCommentKind()) {
+  case NoCommentKind: return "NoCommentKind";
+#define ABSTRACT_COMMENT(COMMENT)
+#define COMMENT(CLASS, PARENT) \
+  case CLASS##Kind: \
+    return #CLASS;
+#include "clang/AST/CommentNodes.inc"
+#undef COMMENT
+#undef ABSTRACT_COMMENT
+  }
+  llvm_unreachable("Unknown comment kind!");
+}
+
+namespace {
+struct good {};
+struct bad {};
+
+template <typename T>
+good implements_child_begin_end(Comment::child_iterator (T::*)() const) {
+  return good();
+}
+
+LLVM_ATTRIBUTE_UNUSED
+static inline bad implements_child_begin_end(
+                      Comment::child_iterator (Comment::*)() const) {
+  return bad();
+}
+
+#define ASSERT_IMPLEMENTS_child_begin(function) \
+  (void) good(implements_child_begin_end(function))
+
+LLVM_ATTRIBUTE_UNUSED
+static inline void CheckCommentASTNodes() {
+#define ABSTRACT_COMMENT(COMMENT)
+#define COMMENT(CLASS, PARENT) \
+  ASSERT_IMPLEMENTS_child_begin(&CLASS::child_begin); \
+  ASSERT_IMPLEMENTS_child_begin(&CLASS::child_end);
+#include "clang/AST/CommentNodes.inc"
+#undef COMMENT
+#undef ABSTRACT_COMMENT
+}
+
+#undef ASSERT_IMPLEMENTS_child_begin
+
+} // end unnamed namespace
+
+Comment::child_iterator Comment::child_begin() const {
+  switch (getCommentKind()) {
+  case NoCommentKind: llvm_unreachable("comment without a kind");
+#define ABSTRACT_COMMENT(COMMENT)
+#define COMMENT(CLASS, PARENT) \
+  case CLASS##Kind: \
+    return static_cast<const CLASS *>(this)->child_begin();
+#include "clang/AST/CommentNodes.inc"
+#undef COMMENT
+#undef ABSTRACT_COMMENT
+  }
+  llvm_unreachable("Unknown comment kind!");
+}
+
+Comment::child_iterator Comment::child_end() const {
+  switch (getCommentKind()) {
+  case NoCommentKind: llvm_unreachable("comment without a kind");
+#define ABSTRACT_COMMENT(COMMENT)
+#define COMMENT(CLASS, PARENT) \
+  case CLASS##Kind: \
+    return static_cast<const CLASS *>(this)->child_end();
+#include "clang/AST/CommentNodes.inc"
+#undef COMMENT
+#undef ABSTRACT_COMMENT
+  }
+  llvm_unreachable("Unknown comment kind!");
+}
+
+bool TextComment::isWhitespaceNoCache() const {
+  for (StringRef::const_iterator I = Text.begin(), E = Text.end();
+       I != E; ++I) {
+    if (!clang::isWhitespace(*I))
+      return false;
+  }
+  return true;
+}
+
+bool ParagraphComment::isWhitespaceNoCache() const {
+  for (child_iterator I = child_begin(), E = child_end(); I != E; ++I) {
+    if (const TextComment *TC = dyn_cast<TextComment>(*I)) {
+      if (!TC->isWhitespace())
+        return false;
+    } else
+      return false;
+  }
+  return true;
+}
+
+static TypeLoc lookThroughTypedefOrTypeAliasLocs(TypeLoc &SrcTL) {
+  TypeLoc TL = SrcTL.IgnoreParens();
+
+  // Look through attribute types.
+  if (AttributedTypeLoc AttributeTL = TL.getAs<AttributedTypeLoc>())
+    return AttributeTL.getModifiedLoc();
+  // Look through qualified types.
+  if (QualifiedTypeLoc QualifiedTL = TL.getAs<QualifiedTypeLoc>())
+    return QualifiedTL.getUnqualifiedLoc();
+  // Look through pointer types.
+  if (PointerTypeLoc PointerTL = TL.getAs<PointerTypeLoc>())
+    return PointerTL.getPointeeLoc().getUnqualifiedLoc();
+  // Look through reference types.
+  if (ReferenceTypeLoc ReferenceTL = TL.getAs<ReferenceTypeLoc>())
+    return ReferenceTL.getPointeeLoc().getUnqualifiedLoc();
+  // Look through adjusted types.
+  if (AdjustedTypeLoc ATL = TL.getAs<AdjustedTypeLoc>())
+    return ATL.getOriginalLoc();
+  if (BlockPointerTypeLoc BlockPointerTL = TL.getAs<BlockPointerTypeLoc>())
+    return BlockPointerTL.getPointeeLoc().getUnqualifiedLoc();
+  if (MemberPointerTypeLoc MemberPointerTL = TL.getAs<MemberPointerTypeLoc>())
+    return MemberPointerTL.getPointeeLoc().getUnqualifiedLoc();
+  if (ElaboratedTypeLoc ETL = TL.getAs<ElaboratedTypeLoc>())
+    return ETL.getNamedTypeLoc();
+
+  return TL;
+}
+
+static bool getFunctionTypeLoc(TypeLoc TL, FunctionTypeLoc &ResFTL) {
+  TypeLoc PrevTL;
+  while (PrevTL != TL) {
+    PrevTL = TL;
+    TL = lookThroughTypedefOrTypeAliasLocs(TL);
+  }
+
+  if (FunctionTypeLoc FTL = TL.getAs<FunctionTypeLoc>()) {
+    ResFTL = FTL;
+    return true;
+  }
+
+  if (TemplateSpecializationTypeLoc STL =
+          TL.getAs<TemplateSpecializationTypeLoc>()) {
+    // If we have a typedef to a template specialization with exactly one
+    // template argument of a function type, this looks like std::function,
+    // boost::function, or other function wrapper.  Treat these typedefs as
+    // functions.
+    if (STL.getNumArgs() != 1)
+      return false;
+    TemplateArgumentLoc MaybeFunction = STL.getArgLoc(0);
+    if (MaybeFunction.getArgument().getKind() != TemplateArgument::Type)
+      return false;
+    TypeSourceInfo *MaybeFunctionTSI = MaybeFunction.getTypeSourceInfo();
+    TypeLoc TL = MaybeFunctionTSI->getTypeLoc().getUnqualifiedLoc();
+    if (FunctionTypeLoc FTL = TL.getAs<FunctionTypeLoc>()) {
+      ResFTL = FTL;
+      return true;
+    }
+  }
+
+  return false;
+}
+
+const char *ParamCommandComment::getDirectionAsString(PassDirection D) {
+  switch (D) {
+  case ParamCommandComment::In:
+    return "[in]";
+  case ParamCommandComment::Out:
+    return "[out]";
+  case ParamCommandComment::InOut:
+    return "[in,out]";
+  }
+  llvm_unreachable("unknown PassDirection");
+}
+
+void DeclInfo::fill() {
+  assert(!IsFilled);
+
+  // Set defaults.
+  Kind = OtherKind;
+  TemplateKind = NotTemplate;
+  IsObjCMethod = false;
+  IsInstanceMethod = false;
+  IsClassMethod = false;
+  ParamVars = None;
+  TemplateParameters = nullptr;
+
+  if (!CommentDecl) {
+    // If there is no declaration, the defaults is our only guess.
+    IsFilled = true;
+    return;
+  }
+  CurrentDecl = CommentDecl;
+
+  Decl::Kind K = CommentDecl->getKind();
+  switch (K) {
+  default:
+    // Defaults are should be good for declarations we don't handle explicitly.
+    break;
+  case Decl::Function:
+  case Decl::CXXMethod:
+  case Decl::CXXConstructor:
+  case Decl::CXXDestructor:
+  case Decl::CXXConversion: {
+    const FunctionDecl *FD = cast<FunctionDecl>(CommentDecl);
+    Kind = FunctionKind;
+    ParamVars = FD->parameters();
+    ReturnType = FD->getReturnType();
+    unsigned NumLists = FD->getNumTemplateParameterLists();
+    if (NumLists != 0) {
+      TemplateKind = TemplateSpecialization;
+      TemplateParameters =
+          FD->getTemplateParameterList(NumLists - 1);
+    }
+
+    if (K == Decl::CXXMethod || K == Decl::CXXConstructor ||
+        K == Decl::CXXDestructor || K == Decl::CXXConversion) {
+      const CXXMethodDecl *MD = cast<CXXMethodDecl>(CommentDecl);
+      IsInstanceMethod = MD->isInstance();
+      IsClassMethod = !IsInstanceMethod;
+    }
+    break;
+  }
+  case Decl::ObjCMethod: {
+    const ObjCMethodDecl *MD = cast<ObjCMethodDecl>(CommentDecl);
+    Kind = FunctionKind;
+    ParamVars = MD->parameters();
+    ReturnType = MD->getReturnType();
+    IsObjCMethod = true;
+    IsInstanceMethod = MD->isInstanceMethod();
+    IsClassMethod = !IsInstanceMethod;
+    break;
+  }
+  case Decl::FunctionTemplate: {
+    const FunctionTemplateDecl *FTD = cast<FunctionTemplateDecl>(CommentDecl);
+    Kind = FunctionKind;
+    TemplateKind = Template;
+    const FunctionDecl *FD = FTD->getTemplatedDecl();
+    ParamVars = FD->parameters();
+    ReturnType = FD->getReturnType();
+    TemplateParameters = FTD->getTemplateParameters();
+    break;
+  }
+  case Decl::ClassTemplate: {
+    const ClassTemplateDecl *CTD = cast<ClassTemplateDecl>(CommentDecl);
+    Kind = ClassKind;
+    TemplateKind = Template;
+    TemplateParameters = CTD->getTemplateParameters();
+    break;
+  }
+  case Decl::ClassTemplatePartialSpecialization: {
+    const ClassTemplatePartialSpecializationDecl *CTPSD =
+        cast<ClassTemplatePartialSpecializationDecl>(CommentDecl);
+    Kind = ClassKind;
+    TemplateKind = TemplatePartialSpecialization;
+    TemplateParameters = CTPSD->getTemplateParameters();
+    break;
+  }
+  case Decl::ClassTemplateSpecialization:
+    Kind = ClassKind;
+    TemplateKind = TemplateSpecialization;
+    break;
+  case Decl::Record:
+  case Decl::CXXRecord:
+    Kind = ClassKind;
+    break;
+  case Decl::Var:
+  case Decl::Field:
+  case Decl::EnumConstant:
+  case Decl::ObjCIvar:
+  case Decl::ObjCAtDefsField:
+  case Decl::ObjCProperty: {
+    const TypeSourceInfo *TSI;
+    if (const auto *VD = dyn_cast<DeclaratorDecl>(CommentDecl))
+      TSI = VD->getTypeSourceInfo();
+    else if (const auto *PD = dyn_cast<ObjCPropertyDecl>(CommentDecl))
+      TSI = PD->getTypeSourceInfo();
+    else
+      TSI = nullptr;
+    if (TSI) {
+      TypeLoc TL = TSI->getTypeLoc().getUnqualifiedLoc();
+      FunctionTypeLoc FTL;
+      if (getFunctionTypeLoc(TL, FTL)) {
+        ParamVars = FTL.getParams();
+        ReturnType = FTL.getReturnLoc().getType();
+      }
+    }
+    Kind = VariableKind;
+    break;
+  }
+  case Decl::Namespace:
+    Kind = NamespaceKind;
+    break;
+  case Decl::TypeAlias:
+  case Decl::Typedef: {
+    Kind = TypedefKind;
+    // If this is a typedef / using to something we consider a function, extract
+    // arguments and return type.
+    const TypeSourceInfo *TSI =
+        K == Decl::Typedef
+            ? cast<TypedefDecl>(CommentDecl)->getTypeSourceInfo()
+            : cast<TypeAliasDecl>(CommentDecl)->getTypeSourceInfo();
+    if (!TSI)
+      break;
+    TypeLoc TL = TSI->getTypeLoc().getUnqualifiedLoc();
+    FunctionTypeLoc FTL;
+    if (getFunctionTypeLoc(TL, FTL)) {
+      Kind = FunctionKind;
+      ParamVars = FTL.getParams();
+      ReturnType = FTL.getReturnLoc().getType();
+    }
+    break;
+  }
+  case Decl::TypeAliasTemplate: {
+    const TypeAliasTemplateDecl *TAT = cast<TypeAliasTemplateDecl>(CommentDecl);
+    Kind = TypedefKind;
+    TemplateKind = Template;
+    TemplateParameters = TAT->getTemplateParameters();
+    TypeAliasDecl *TAD = TAT->getTemplatedDecl();
+    if (!TAD)
+      break;
+
+    const TypeSourceInfo *TSI = TAD->getTypeSourceInfo();
+    if (!TSI)
+      break;
+    TypeLoc TL = TSI->getTypeLoc().getUnqualifiedLoc();
+    FunctionTypeLoc FTL;
+    if (getFunctionTypeLoc(TL, FTL)) {
+      Kind = FunctionKind;
+      ParamVars = FTL.getParams();
+      ReturnType = FTL.getReturnLoc().getType();
+    }
+    break;
+  }
+  case Decl::Enum:
+    Kind = EnumKind;
+    break;
+  }
+
+  IsFilled = true;
+}
+
+StringRef ParamCommandComment::getParamName(const FullComment *FC) const {
+  assert(isParamIndexValid());
+  if (isVarArgParam())
+    return "...";
+  return FC->getDeclInfo()->ParamVars[getParamIndex()]->getName();
+}
+
+StringRef TParamCommandComment::getParamName(const FullComment *FC) const {
+  assert(isPositionValid());
+  const TemplateParameterList *TPL = FC->getDeclInfo()->TemplateParameters;
+  for (unsigned i = 0, e = getDepth(); i != e; ++i) {
+    assert(TPL && "Unknown TemplateParameterList");
+    if (i == e - 1)
+      return TPL->getParam(getIndex(i))->getName();
+    const NamedDecl *Param = TPL->getParam(getIndex(i));
+    if (auto *TTP = dyn_cast<TemplateTemplateParmDecl>(Param))
+      TPL = TTP->getTemplateParameters();
+  }
+  return "";
+}
+
+} // end namespace comments
+} // end namespace clang
+