1265 lines
47 KiB
C++
1265 lines
47 KiB
C++
//===--- iwyu_ast_util.cc - clang-AST utilities for include-what-you-use --===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// Utilities that make it easier to work with Clang's AST.
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#include "iwyu_ast_util.h"
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#include <set> // for set
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#include <string> // for string, operator+, etc
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#include <utility> // for pair
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#include "iwyu_globals.h"
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#include "iwyu_location_util.h"
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#include "iwyu_path_util.h"
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#include "iwyu_stl_util.h"
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#include "iwyu_string_util.h"
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#include "iwyu_verrs.h"
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#include "port.h" // for CHECK_
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/raw_ostream.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclBase.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/DeclTemplate.h"
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#include "clang/AST/ExprCXX.h"
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#include "clang/AST/NestedNameSpecifier.h"
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#include "clang/AST/RecursiveASTVisitor.h"
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#include "clang/AST/Stmt.h"
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#include "clang/AST/TemplateBase.h"
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#include "clang/AST/TemplateName.h"
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#include "clang/AST/Type.h"
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#include "clang/AST/TypeLoc.h"
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#include "clang/Basic/SourceLocation.h"
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#include "clang/Basic/SourceManager.h"
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namespace clang {
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class FileEntry;
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} // namespace clang
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using clang::ASTTemplateArgumentListInfo;
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using clang::BlockPointerType;
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using clang::CXXConstructExpr;
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using clang::CXXConstructorDecl;
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using clang::CXXDeleteExpr;
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using clang::CXXDependentScopeMemberExpr;
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using clang::CXXDestructorDecl;
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using clang::CXXMethodDecl;
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using clang::CXXNewExpr;
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using clang::CXXRecordDecl;
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using clang::CallExpr;
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using clang::CastExpr;
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using clang::ClassTemplateDecl;
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using clang::ClassTemplatePartialSpecializationDecl;
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using clang::ClassTemplateSpecializationDecl;
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using clang::Decl;
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using clang::DeclContext;
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using clang::DeclRefExpr;
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using clang::DeclaratorDecl;
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using clang::DependentNameType;
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using clang::DependentScopeDeclRefExpr;
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using clang::DependentTemplateName;
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using clang::DependentTemplateSpecializationType;
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using clang::ElaboratedType;
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using clang::EnumDecl;
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using clang::ExplicitCastExpr;
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using clang::Expr;
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using clang::ExprWithCleanups;
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using clang::FileEntry;
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using clang::FriendDecl;
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using clang::FriendTemplateDecl;
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using clang::FullSourceLoc;
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using clang::FunctionDecl;
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using clang::FunctionProtoType;
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using clang::FunctionType;
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using clang::ImplicitCastExpr;
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using clang::InjectedClassNameType;
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using clang::LValueReferenceType;
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using clang::MemberExpr;
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using clang::MemberPointerType;
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using clang::NamedDecl;
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using clang::NestedNameSpecifier;
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using clang::NestedNameSpecifierLoc;
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using clang::ObjCObjectType;
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using clang::OverloadExpr;
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using clang::PointerType;
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using clang::QualType;
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using clang::QualifiedTemplateName;
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using clang::RecordDecl;
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using clang::RecordType;
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using clang::RecursiveASTVisitor;
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using clang::SourceLocation;
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using clang::SourceManager;
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using clang::SourceRange;
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using clang::Stmt;
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using clang::SubstTemplateTypeParmType;
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using clang::TagDecl;
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using clang::TagType;
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using clang::TemplateArgument;
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using clang::TemplateArgumentList;
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using clang::TemplateArgumentLoc;
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using clang::TemplateDecl;
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using clang::TemplateName;
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using clang::TemplateParameterList;
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using clang::TemplateSpecializationType;
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using clang::Type;
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using clang::TypeDecl;
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using clang::TypeLoc;
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using clang::TypedefNameDecl;
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using clang::TypedefType;
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using clang::UnaryOperator;
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using clang::UsingDirectiveDecl;
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using clang::ValueDecl;
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using clang::VarDecl;
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using llvm::PointerUnion;
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using llvm::cast;
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using llvm::dyn_cast_or_null;
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using llvm::errs;
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using llvm::isa;
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using llvm::raw_string_ostream;
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namespace include_what_you_use {
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//------------------------------------------------------------
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// ASTNode and associated utilities.
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SourceLocation ASTNode::GetLocation() const {
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SourceLocation retval;
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if (FillLocationIfKnown(&retval))
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return retval;
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// OK, let's ask a parent node.
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for (const ASTNode* node = parent_; node != NULL; node = node->parent_) {
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if (node->FillLocationIfKnown(&retval))
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break;
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}
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// If the parent node shows the spelling and instantiation
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// locations are in a different file, then we're uncertain of our
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// own location. Return an invalid location.
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if (retval.isValid()) {
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FullSourceLoc full_loc(retval, source_manager_);
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const FileEntry* spelling_file =
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source_manager_.getFileEntryForID(
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source_manager_.getFileID(full_loc.getSpellingLoc()));
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const FileEntry* instantiation_file =
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source_manager_.getFileEntryForID(
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source_manager_.getFileID(full_loc.getExpansionLoc()));
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if (spelling_file != instantiation_file)
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return SourceLocation();
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}
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return retval;
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}
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bool ASTNode::FillLocationIfKnown(SourceLocation* loc) const {
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using include_what_you_use::GetLocation;
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switch (kind_) {
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case kDeclKind:
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*loc = GetLocation(as_decl_); // in iwyu_location_util.h
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return true;
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case kStmtKind:
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*loc = GetLocation(as_stmt_);
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return true;
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case kTypelocKind:
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*loc = GetLocation(as_typeloc_);
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return true;
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case kNNSLocKind:
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*loc = GetLocation(as_nnsloc_);
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return true;
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case kTemplateArgumentLocKind:
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*loc = GetLocation(as_template_argloc_);
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return true;
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case kTypeKind:
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case kNNSKind:
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case kTemplateNameKind:
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case kTemplateArgumentKind:
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return false;
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default:
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CHECK_(false && "Unexpected kind of ASTNode");
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return false;
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}
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}
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// --- Utilities for ASTNode.
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bool IsElaborationNode(const ASTNode* ast_node) {
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if (ast_node == NULL)
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return false;
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const ElaboratedType* elaborated_type = ast_node->GetAs<ElaboratedType>();
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return elaborated_type && elaborated_type->getKeyword() != clang::ETK_None;
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}
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bool IsNamespaceQualifiedNode(const ASTNode* ast_node) {
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if (ast_node == NULL)
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return false;
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const ElaboratedType* elaborated_type = ast_node->GetAs<ElaboratedType>();
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return (elaborated_type && elaborated_type->getQualifier()
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&& elaborated_type->getQualifier()->getKind() ==
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NestedNameSpecifier::Namespace);
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}
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bool IsNodeInsideCXXMethodBody(const ASTNode* ast_node) {
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// If we're a destructor, we're definitely part of a method body;
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// destructors don't have any other parts to them. This case is
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// triggered when we see implicit destruction of member vars.
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if (ast_node && ast_node->IsA<CXXDestructorDecl>())
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return true;
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for (; ast_node != NULL; ast_node = ast_node->parent()) {
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// If we're a constructor, check if we're part of the
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// initializers, which also count as 'the body' of the method.
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if (const CXXConstructorDecl* ctor =
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ast_node->GetParentAs<CXXConstructorDecl>()) {
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for (CXXConstructorDecl::init_const_iterator
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it = ctor->init_begin(); it != ctor->init_end(); ++it) {
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if (ast_node->ContentIs((*it)->getInit()))
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return true;
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}
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// Now fall through to see if we're the body of the constructor.
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}
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if (const CXXMethodDecl* method_decl =
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ast_node->GetParentAs<CXXMethodDecl>()) {
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if (ast_node->ContentIs(method_decl->getBody())) {
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return true;
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}
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}
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}
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return false;
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}
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bool IsNestedClassAsWritten(const ASTNode* ast_node) {
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return (ast_node->IsA<RecordDecl>() &&
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(ast_node->ParentIsA<CXXRecordDecl>() ||
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// For templated nested-classes, a ClassTemplateDecl is interposed.
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(ast_node->ParentIsA<ClassTemplateDecl>() &&
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ast_node->AncestorIsA<CXXRecordDecl>(2))));
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}
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bool IsDefaultTemplateTemplateArg(const ASTNode* ast_node) {
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// Is ast_node the 'D' in the following:
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// template<template <typename A> class T = D> class C { ... }
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// ('D' might be something like 'vector').
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// D is a TemplateName, since it's a template, and its parent
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// is a TemplateArgument, since D is inside a template argument.
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// The only way a template name can be in a template argument
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// is if it's a default parameter.
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return (ast_node->IsA<TemplateName>() &&
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ast_node->ParentIsA<TemplateArgument>());
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}
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bool IsCXXConstructExprInInitializer(const ASTNode* ast_node) {
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if (!ast_node->IsA<CXXConstructExpr>())
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return false;
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CHECK_(ast_node->parent() && "Constructor should not be a top-level node!");
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// Typically, you can tell an initializer because its parent is a
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// constructor decl. But sometimes -- I'm not exactly sure when --
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// there can be an ExprWithCleanups in the middle.
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return ((ast_node->ParentIsA<CXXConstructorDecl>()) ||
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(ast_node->ParentIsA<ExprWithCleanups>() &&
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ast_node->AncestorIsA<CXXConstructorDecl>(2)));
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}
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bool IsCXXConstructExprInNewExpr(const ASTNode* ast_node) {
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if (!ast_node->IsA<CXXConstructExpr>())
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return false;
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CHECK_(ast_node->parent() && "Constructor should not be a top-level node!");
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return ast_node->ParentIsA<CXXNewExpr>();
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}
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template<typename T>
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NestedNameSpecifier* TryGetQualifier(const ASTNode* ast_node) {
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if (ast_node->IsA<T>())
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return ast_node->GetAs<T>()->getQualifier();
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return NULL;
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}
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const NestedNameSpecifier* GetQualifier(const ASTNode* ast_node) {
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const NestedNameSpecifier* nns = NULL;
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if (ast_node->IsA<TemplateName>()) {
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const TemplateName* tn = ast_node->GetAs<TemplateName>();
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if (const DependentTemplateName* dtn
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= tn->getAsDependentTemplateName())
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nns = dtn->getQualifier();
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else if (const QualifiedTemplateName* qtn
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= tn->getAsQualifiedTemplateName())
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nns = qtn->getQualifier();
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}
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if (!nns) nns = TryGetQualifier<ElaboratedType>(ast_node);
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if (!nns) nns = TryGetQualifier<DependentNameType>(ast_node);
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if (!nns)
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nns = TryGetQualifier<DependentTemplateSpecializationType>(ast_node);
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if (!nns) nns = TryGetQualifier<UsingDirectiveDecl>(ast_node);
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if (!nns) nns = TryGetQualifier<EnumDecl>(ast_node);
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if (!nns) nns = TryGetQualifier<RecordDecl>(ast_node);
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if (!nns) nns = TryGetQualifier<DeclaratorDecl>(ast_node);
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if (!nns) nns = TryGetQualifier<FunctionDecl>(ast_node);
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if (!nns) nns = TryGetQualifier<CXXDependentScopeMemberExpr>(ast_node);
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if (!nns) nns = TryGetQualifier<DeclRefExpr>(ast_node);
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if (!nns) nns = TryGetQualifier<DependentScopeDeclRefExpr>(ast_node);
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if (!nns) nns = TryGetQualifier<MemberExpr>(ast_node);
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return nns;
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}
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bool IsMemberOfATypedef(const ASTNode* ast_node) {
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// TODO(csilvers): is this ever triggered in practice?
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if (ast_node->ParentIsA<TypedefType>()) { // my_typedef.a
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return true;
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}
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// If we're one of those objects that exposes its qualifier
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// (stuff before the ::), use that.
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const NestedNameSpecifier* nns = GetQualifier(ast_node);
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// If that doesn't work, see if our parent in the tree is an nns
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// node. We have to be a bit careful here: 1) If we're a typedef
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// ourselves, the nns-parent is just us. We have to go a level up
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// to see our 'real' qualifier. 2) Often the parent will be an
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// elaborated type, and we get to the qualifier that way.
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if (!nns) {
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nns = ast_node->GetParentAs<NestedNameSpecifier>();
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if (nns && ast_node->IsA<TypedefType>()) {
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nns = nns->getPrefix();
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} else if (!nns) {
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// nns will be non-NULL when processing 'a' in MyTypedef::a::b
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// But typically, such as processing 'a' in MyTypedef::a or 'b' in
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// MyTypedef::a::b, the parent will be an ElaboratedType.
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if (const ElaboratedType* elab_type =
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ast_node->GetParentAs<ElaboratedType>())
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nns = elab_type->getQualifier();
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}
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}
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for (; nns; nns = nns->getPrefix()) {
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if (nns->getAsType() && isa<TypedefType>(nns->getAsType()))
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return true;
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}
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return false;
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}
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const DeclContext* GetDeclContext(const ASTNode* ast_node) {
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for (; ast_node != NULL; ast_node = ast_node->parent()) {
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if (ast_node->IsA<Decl>())
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return ast_node->GetAs<Decl>()->getDeclContext();
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}
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return NULL;
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}
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//------------------------------------------------------------
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// Helper functions for working with raw Clang AST nodes.
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// --- Printers.
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string PrintableLoc(SourceLocation loc) {
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if (loc.isInvalid()) {
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return "Invalid location";
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} else {
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std::string buffer; // llvm wants regular string, not our versa-string
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raw_string_ostream ostream(buffer);
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loc.print(ostream, *GlobalSourceManager());
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return NormalizeFilePath(ostream.str());
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}
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}
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string PrintableSourceRange(SourceRange range) {
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return PrintableLoc(range.getBegin()) + " - " + PrintableLoc(range.getEnd());
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}
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string PrintableDecl(const Decl* decl) {
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std::string buffer; // llvm wants regular string, not our versa-string
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raw_string_ostream ostream(buffer);
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decl->print(ostream); // Note: can also set indentation and printingpolicy
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return ostream.str();
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}
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void PrintStmt(const Stmt* stmt) {
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stmt->dump(*GlobalSourceManager()); // This prints to errs().
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}
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string PrintableType(const Type* type) {
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return QualType(type, 0).getAsString();
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}
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string PrintableTypeLoc(const TypeLoc& typeloc) {
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return PrintableType(typeloc.getTypePtr());
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}
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string PrintableNestedNameSpecifier(
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const NestedNameSpecifier* nns) {
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std::string buffer; // llvm wants regular string, not our versa-string
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raw_string_ostream ostream(buffer);
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nns->print(ostream, DefaultPrintPolicy());
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return ostream.str();
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}
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string PrintableTemplateName(const TemplateName& tpl_name) {
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std::string buffer; // llvm wants regular string, not our versa-string
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raw_string_ostream ostream(buffer);
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tpl_name.print(ostream, DefaultPrintPolicy());
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return ostream.str();
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}
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string PrintableTemplateArgument(const TemplateArgument& arg) {
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return TemplateSpecializationType::PrintTemplateArgumentList(
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&arg, 1, DefaultPrintPolicy());
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}
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string PrintableTemplateArgumentLoc(
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const TemplateArgumentLoc& arg) {
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return TemplateSpecializationType::PrintTemplateArgumentList(
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&arg, 1, DefaultPrintPolicy());
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}
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// This prints to errs(). It's useful for debugging (e.g. inside gdb).
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void PrintASTNode(const ASTNode* node) {
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if (const Decl* decl = node->GetAs<Decl>()) {
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errs() << "[" << decl->getDeclKindName() << "Decl] "
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<< PrintableDecl(decl) << "\n";
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} else if (const Stmt* stmt = node->GetAs<Stmt>()) {
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errs() << "[" << stmt->getStmtClassName() << "] ";
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PrintStmt(stmt);
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errs() << "\n";
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} else if (const Type* type = node->GetAs<Type>()) { // +typeloc
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errs() << "[" << type->getTypeClassName()
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<< (node->IsA<TypeLoc>() ? "TypeLoc" : "Type") << "] "
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<< PrintableType(type) << "\n";
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} else if (const NestedNameSpecifier* nns
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= node->GetAs<NestedNameSpecifier>()) {
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errs() << "[NestedNameSpecifier] "
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<< PrintableNestedNameSpecifier(nns) << "\n";
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} else if (const TemplateName* tpl_name
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= node->GetAs<TemplateName>()) {
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errs() << "[TemplateName] "
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<< PrintableTemplateName(*tpl_name) << "\n";
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} else if (const TemplateArgumentLoc* tpl_argloc
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= node->GetAs<TemplateArgumentLoc>()) {
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errs() << "[TemplateArgumentLoc] "
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<< PrintableTemplateArgumentLoc(*tpl_argloc) << "\n";
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} else if (const TemplateArgument* tpl_arg
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= node->GetAs<TemplateArgument>()) {
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errs() << "[TemplateArgument] "
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<< PrintableTemplateArgument(*tpl_arg) << "\n";
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} else {
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CHECK_(false && "Unknown kind for ASTNode");
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}
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}
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// --- Utilities for Template Arguments.
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// If the TemplateArgument is a type (and not an expression such as
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// 'true', or a template such as 'vector', etc), return it. Otherwise
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// return NULL.
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static const Type* GetTemplateArgAsType(const TemplateArgument& tpl_arg) {
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if (tpl_arg.getKind() == TemplateArgument::Type)
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return tpl_arg.getAsType().getTypePtr();
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return NULL;
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}
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// These utilities figure out the template arguments that are
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// specified in various contexts: TemplateSpecializationType (for
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// template classes) and FunctionDecl (for template functions).
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//
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// For classes, we care only about explicitly specified template args,
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// not implicit, default args. For functions, we care about all
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// template args, since if not specified they're derived from the
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// function arguments. In either case, we only care about template
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// arguments that are types (including template types), not other
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// kinds of arguments such as built-in types.
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// This helper class visits a given AST node and finds all the types
|
|
// beneath it, which it returns as a set. For example, if you have a
|
|
// VarDecl 'vector<int(*)(const MyClass&)> x', it would return
|
|
// (vector<int(*)(const MyClass&)>, int(*)(const MyClass&),
|
|
// int(const MyClass&), int, const MyClass&, MyClass). Note that
|
|
// this function only returns types-as-typed, so it does *not* return
|
|
// alloc<int(*)(const MyClass&)>, even though it's part of vector.
|
|
class TypeEnumerator : public RecursiveASTVisitor<TypeEnumerator> {
|
|
public:
|
|
typedef RecursiveASTVisitor<TypeEnumerator> Base;
|
|
|
|
// --- Public interface
|
|
// We can add more entry points as needed.
|
|
set<const Type*> Enumerate(const Type* type) {
|
|
seen_types_.clear();
|
|
if (!type)
|
|
return seen_types_;
|
|
TraverseType(QualType(type, 0));
|
|
return seen_types_;
|
|
}
|
|
|
|
set<const Type*> Enumerate(const TemplateArgument& tpl_arg) {
|
|
seen_types_.clear();
|
|
TraverseTemplateArgument(tpl_arg);
|
|
return seen_types_;
|
|
}
|
|
|
|
// --- Methods on RecursiveASTVisitor
|
|
bool VisitType(Type* type) {
|
|
seen_types_.insert(type);
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
set<const Type*> seen_types_;
|
|
};
|
|
|
|
// A 'component' of a type is a type beneath it in the AST tree.
|
|
// So 'Foo*' has component 'Foo', as does 'vector<Foo>', while
|
|
// vector<pair<Foo, Bar> > has components pair<Foo,Bar>, Foo, and Bar.
|
|
set<const Type*> GetComponentsOfType(const Type* type) {
|
|
TypeEnumerator type_enumerator;
|
|
return type_enumerator.Enumerate(type);
|
|
}
|
|
|
|
// --- Utilities for Decl.
|
|
|
|
bool IsTemplatizedFunctionDecl(const FunctionDecl* decl) {
|
|
return decl && decl->getTemplateSpecializationArgs() != NULL;
|
|
}
|
|
|
|
bool HasImplicitConversionCtor(const CXXRecordDecl* cxx_class) {
|
|
for (CXXRecordDecl::ctor_iterator ctor = cxx_class->ctor_begin();
|
|
ctor != cxx_class->ctor_end(); ++ctor) {
|
|
if (ctor->isExplicit() || ctor->getNumParams() != 1 ||
|
|
ctor->isCopyConstructor())
|
|
continue;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
const RecordDecl* GetDefinitionForClass(const Decl* decl) {
|
|
const RecordDecl* as_record = DynCastFrom(decl);
|
|
const ClassTemplateDecl* as_tpl = DynCastFrom(decl);
|
|
if (as_tpl) { // Convert the template to its underlying class defn.
|
|
as_record = dyn_cast_or_null<RecordDecl>(as_tpl->getTemplatedDecl());
|
|
}
|
|
if (as_record) {
|
|
if (const RecordDecl* record_dfn = as_record->getDefinition()) {
|
|
return record_dfn;
|
|
}
|
|
// If we're a templated class that was never instantiated (because
|
|
// we were never "used"), then getDefinition() will return NULL.
|
|
if (const ClassTemplateSpecializationDecl* spec_decl = DynCastFrom(decl)) {
|
|
PointerUnion<ClassTemplateDecl*,
|
|
ClassTemplatePartialSpecializationDecl*>
|
|
specialized_decl = spec_decl->getSpecializedTemplateOrPartial();
|
|
if (const ClassTemplatePartialSpecializationDecl*
|
|
partial_spec_decl =
|
|
specialized_decl.dyn_cast<
|
|
ClassTemplatePartialSpecializationDecl*>()) {
|
|
// decl would be instantiated from a template partial
|
|
// specialization.
|
|
CHECK_(partial_spec_decl->hasDefinition());
|
|
return partial_spec_decl->getDefinition();
|
|
} else if (const ClassTemplateDecl* tpl_decl =
|
|
specialized_decl.dyn_cast<ClassTemplateDecl*>()) {
|
|
// decl would be instantiated from a non-specialized
|
|
// template.
|
|
if (tpl_decl->getTemplatedDecl()->hasDefinition())
|
|
return tpl_decl->getTemplatedDecl()->getDefinition();
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
SourceRange GetSourceRangeOfClassDecl(const Decl* decl) {
|
|
// If we're a templatized class, go 'up' a level to get the
|
|
// template<...> prefix as well.
|
|
if (const CXXRecordDecl* cxx_decl = DynCastFrom(decl)) {
|
|
if (cxx_decl->getDescribedClassTemplate())
|
|
return cxx_decl->getDescribedClassTemplate()->getSourceRange();
|
|
}
|
|
// We can get source ranges of classes and template classes.
|
|
if (const TagDecl* tag_decl = DynCastFrom(decl))
|
|
return tag_decl->getSourceRange();
|
|
if (const TemplateDecl* tpl_decl = DynCastFrom(decl))
|
|
return tpl_decl->getSourceRange();
|
|
CHECK_(false && "Cannot get source range for this decl type");
|
|
return SourceRange();
|
|
}
|
|
|
|
// Helper for the Get*ResugarMap*() functions. Given a map from
|
|
// desugared->resugared types, looks at each component of the
|
|
// resugared type (eg, both hash_set<Foo>* and vector<hash_set<Foo> >
|
|
// have two components: hash_set<Foo> and Foo), and returns a map that
|
|
// contains the original map elements plus mapping for the components.
|
|
// This is because when a type is 'owned' by the template
|
|
// instantiator, all parts of the type are owned. We only consider
|
|
// type-components as typed.
|
|
static map<const Type*, const Type*> ResugarTypeComponents(
|
|
const map<const Type*, const Type*>& resugar_map) {
|
|
map<const Type*, const Type*> retval = resugar_map;
|
|
for (Each<const Type*, const Type*> it(&resugar_map); !it.AtEnd(); ++it) {
|
|
const set<const Type*>& components = GetComponentsOfType(it->second);
|
|
for (Each<const Type*> component_type(&components);
|
|
!component_type.AtEnd(); ++component_type) {
|
|
const Type* desugared_type = GetCanonicalType(*component_type);
|
|
if (!ContainsKey(retval, desugared_type)) {
|
|
retval[desugared_type] = *component_type;
|
|
VERRS(6) << "Adding a type-components of interest: "
|
|
<< PrintableType(*component_type) << "\n";
|
|
}
|
|
}
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
// Helpers for GetTplTypeResugarMapForFunction().
|
|
static map<const Type*, const Type*> GetTplTypeResugarMapForFunctionNoCallExpr(
|
|
const FunctionDecl* decl, unsigned start_arg) {
|
|
map<const Type*, const Type*> retval;
|
|
if (!decl) // can be NULL if the function call is via a function pointer
|
|
return retval;
|
|
if (const TemplateArgumentList* tpl_list
|
|
= decl->getTemplateSpecializationArgs()) {
|
|
for (unsigned i = start_arg; i < tpl_list->size(); ++i) {
|
|
if (const Type* arg_type = GetTemplateArgAsType(tpl_list->get(i))) {
|
|
retval[GetCanonicalType(arg_type)] = arg_type;
|
|
VERRS(6) << "Adding an implicit tpl-function type of interest: "
|
|
<< PrintableType(arg_type) << "\n";
|
|
}
|
|
}
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static map<const Type*, const Type*>
|
|
GetTplTypeResugarMapForFunctionExplicitTplArgs(
|
|
const FunctionDecl* decl,
|
|
const ASTTemplateArgumentListInfo* explicit_tpl_list) {
|
|
map<const Type*, const Type*> retval;
|
|
if (explicit_tpl_list) {
|
|
for (unsigned i = 0; i < explicit_tpl_list->NumTemplateArgs; ++i) {
|
|
const TemplateArgument& arg
|
|
= explicit_tpl_list->getTemplateArgs()[i].getArgument();
|
|
if (const Type* arg_type = GetTemplateArgAsType(arg)) {
|
|
retval[GetCanonicalType(arg_type)] = arg_type;
|
|
VERRS(6) << "Adding an explicit template-function type of interest: "
|
|
<< PrintableType(arg_type) << "\n";
|
|
}
|
|
}
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
map<const Type*, const Type*> GetTplTypeResugarMapForFunction(
|
|
const FunctionDecl* decl, const Expr* calling_expr) {
|
|
map<const Type*, const Type*> retval;
|
|
|
|
// If calling_expr is NULL, then we can't find any explicit template
|
|
// arguments, if they were specified (e.g. 'Fn<int>()'), and we
|
|
// won't be able to get the function arguments as written. So we
|
|
// can't resugar at all. We just have to hope that the types happen
|
|
// to be already sugared, because the actual-type is already canonical.
|
|
if (calling_expr == NULL) {
|
|
retval = GetTplTypeResugarMapForFunctionNoCallExpr(decl, 0);
|
|
retval = ResugarTypeComponents(retval); // add in retval's decomposition
|
|
return retval;
|
|
}
|
|
|
|
// If calling_expr is a CXXConstructExpr of CXXNewExpr, then it's
|
|
// impossible to explicitly specify template arguments; all we have
|
|
// to go on is function arguments. If it's a CallExpr, and some
|
|
// arguments might be explicit, and others implicit. Otherwise,
|
|
// it's a type that doesn't take function template args at all (like
|
|
// CXXDeleteExpr) or only takes explicit args (like DeclRefExpr).
|
|
Expr** fn_args = NULL;
|
|
unsigned num_args = 0;
|
|
unsigned start_of_implicit_args = 0;
|
|
if (const CXXConstructExpr* ctor_expr = DynCastFrom(calling_expr)) {
|
|
fn_args = ctor_expr->getArgs();
|
|
num_args = ctor_expr->getNumArgs();
|
|
} else if (const CallExpr* call_expr = DynCastFrom(calling_expr)) {
|
|
fn_args = const_cast<CallExpr*>(call_expr)->getArgs();
|
|
num_args = call_expr->getNumArgs();
|
|
const Expr* callee_expr = call_expr->getCallee()->IgnoreParenCasts();
|
|
if (const ASTTemplateArgumentListInfo* explicit_tpl_args
|
|
= GetExplicitTplArgs(callee_expr)) {
|
|
retval = GetTplTypeResugarMapForFunctionExplicitTplArgs(
|
|
decl, explicit_tpl_args);
|
|
start_of_implicit_args = explicit_tpl_args->NumTemplateArgs;
|
|
}
|
|
} else {
|
|
// If calling_expr has explicit template args, then consider them.
|
|
if (const ASTTemplateArgumentListInfo* explicit_tpl_args
|
|
= GetExplicitTplArgs(calling_expr)) {
|
|
retval = GetTplTypeResugarMapForFunctionExplicitTplArgs(
|
|
decl, explicit_tpl_args);
|
|
retval = ResugarTypeComponents(retval);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
// Now we have to figure out, as best we can, the sugar-mappings for
|
|
// compiler-deduced template args. We do this by looking at every
|
|
// type specified in any part of the function arguments as written.
|
|
// If any of these types matches a template type, then we take that
|
|
// to be the resugar mapping. If none of the types match, then we
|
|
// assume that the template is matching some desugared part of the
|
|
// type, and we ignore it. For instance:
|
|
// operator<<(basic_ostream<char, T>& o, int i);
|
|
// If I pass in an ostream as the first argument, then no part
|
|
// of the (sugared) argument types match T, so we ignore it.
|
|
const map<const Type*, const Type*>& desugared_types
|
|
= GetTplTypeResugarMapForFunctionNoCallExpr(decl, start_of_implicit_args);
|
|
|
|
// TODO(csilvers): SubstTemplateTypeParms are always desugared,
|
|
// making this less useful than it should be.
|
|
// TODO(csilvers): if the GetArg(i) expr has an implicit cast
|
|
// under it, take the pre-cast type instead?
|
|
set<const Type*> fn_arg_types;
|
|
for (unsigned i = 0; i < num_args; ++i) {
|
|
const Type* argtype = GetTypeOf(fn_args[i]);
|
|
// TODO(csilvers): handle RecordTypes that are a TemplateSpecializationDecl
|
|
InsertAllInto(GetComponentsOfType(argtype), &fn_arg_types);
|
|
}
|
|
|
|
for (Each<const Type*> it(&fn_arg_types); !it.AtEnd(); ++it) {
|
|
// See if any of the template args in retval are the desugared form of us.
|
|
const Type* desugared_type = GetCanonicalType(*it);
|
|
if (ContainsKey(desugared_types, desugared_type)) {
|
|
retval[desugared_type] = *it;
|
|
if (desugared_type != *it) {
|
|
VERRS(6) << "Remapping template arg of interest: "
|
|
<< PrintableType(desugared_type) << " -> "
|
|
<< PrintableType(*it) << "\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
// Log the types we never mapped.
|
|
for (Each<const Type*, const Type*> it(&desugared_types); !it.AtEnd(); ++it) {
|
|
if (!ContainsKey(retval, it->first)) {
|
|
VERRS(6) << "Ignoring unseen-in-fn-args template arg of interest: "
|
|
<< PrintableType(it->first) << "\n";
|
|
}
|
|
}
|
|
|
|
retval = ResugarTypeComponents(retval); // add in the decomposition of retval
|
|
return retval;
|
|
}
|
|
|
|
const NamedDecl* GetInstantiatedFromDecl(const CXXRecordDecl* class_decl) {
|
|
if (const ClassTemplateSpecializationDecl* tpl_sp_decl =
|
|
DynCastFrom(class_decl)) { // an instantiated class template
|
|
PointerUnion<ClassTemplateDecl*, ClassTemplatePartialSpecializationDecl*>
|
|
instantiated_from = tpl_sp_decl->getInstantiatedFrom();
|
|
if (const ClassTemplateDecl* tpl_decl =
|
|
instantiated_from.dyn_cast<ClassTemplateDecl*>()) {
|
|
// class_decl is instantiated from a non-specialized template.
|
|
return tpl_decl;
|
|
} else if (const ClassTemplatePartialSpecializationDecl*
|
|
partial_spec_decl =
|
|
instantiated_from.dyn_cast<
|
|
ClassTemplatePartialSpecializationDecl*>()) {
|
|
// class_decl is instantiated from a template partial specialization.
|
|
return partial_spec_decl;
|
|
}
|
|
}
|
|
// class_decl is not instantiated from a template.
|
|
return class_decl;
|
|
}
|
|
|
|
const NamedDecl* GetDefinitionAsWritten(const NamedDecl* decl) {
|
|
// First, get to decl-as-written.
|
|
if (const CXXRecordDecl* class_decl = DynCastFrom(decl)) {
|
|
decl = GetInstantiatedFromDecl(class_decl);
|
|
if (const ClassTemplateDecl* tpl_decl = DynCastFrom(decl))
|
|
decl = tpl_decl->getTemplatedDecl(); // convert back to CXXRecordDecl
|
|
} else if (const FunctionDecl* func_decl = DynCastFrom(decl)) {
|
|
if (const FunctionDecl* tpl_pattern =
|
|
func_decl->getTemplateInstantiationPattern())
|
|
decl = tpl_pattern;
|
|
}
|
|
// Then, get to definition.
|
|
if (const NamedDecl* class_dfn = GetDefinitionForClass(decl)) {
|
|
return class_dfn;
|
|
} else if (const FunctionDecl* fn_decl = DynCastFrom(decl)) {
|
|
for (FunctionDecl::redecl_iterator it = fn_decl->redecls_begin();
|
|
it != fn_decl->redecls_end(); ++it) {
|
|
if ((*it)->isThisDeclarationADefinition())
|
|
return *it;
|
|
}
|
|
}
|
|
// Couldn't find a definition, just return the original declaration.
|
|
return decl;
|
|
}
|
|
|
|
bool IsDefaultNewOrDelete(const FunctionDecl* decl,
|
|
const string& decl_loc_as_quoted_include) {
|
|
// Clang will report <new> as the location of the default new and
|
|
// delete operators if <new> is included. Otherwise, it reports the
|
|
// (fake) file "<built_in>".
|
|
if (decl_loc_as_quoted_include != "<new>" &&
|
|
!IsBuiltinFile(GetFileEntry(decl)))
|
|
return false;
|
|
|
|
const string decl_name = decl->getNameAsString();
|
|
if (!StartsWith(decl_name, "operator new") &&
|
|
!StartsWith(decl_name, "operator delete"))
|
|
return false;
|
|
|
|
// Placement-new/delete has 2 args, second is void*. The only other
|
|
// 2-arg overloads of new/delete in <new> take a const nothrow_t&.
|
|
if (decl->getNumParams() == 2 &&
|
|
!decl->getParamDecl(1)->getType().isConstQualified())
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool IsFriendDecl(const Decl* decl) {
|
|
// For 'template<...> friend class T', the decl will just be 'class T'.
|
|
// We need to go 'up' a level to check friendship in the right place.
|
|
if (const CXXRecordDecl* cxx_decl = DynCastFrom(decl))
|
|
if (cxx_decl->getDescribedClassTemplate())
|
|
decl = cxx_decl->getDescribedClassTemplate();
|
|
return decl->getFriendObjectKind() != Decl::FOK_None;
|
|
}
|
|
|
|
bool IsForwardDecl(const clang::TagDecl* decl) {
|
|
return (isa<RecordDecl>(decl) && // not an enum
|
|
!decl->isCompleteDefinition() && !IsFriendDecl(decl) &&
|
|
!decl->isEmbeddedInDeclarator());
|
|
}
|
|
|
|
// Two possibilities: it's written as a nested class (that is, with a
|
|
// qualifier) or it's actually living inside another class.
|
|
bool IsNestedClass(const TagDecl* decl) {
|
|
if (decl->getQualifier() &&
|
|
decl->getQualifier()->getKind() == NestedNameSpecifier::TypeSpec) {
|
|
return true;
|
|
}
|
|
return isa<RecordDecl>(decl->getDeclContext());
|
|
}
|
|
|
|
bool HasDefaultTemplateParameters(const TemplateDecl* decl) {
|
|
TemplateParameterList* tpl_params = decl->getTemplateParameters();
|
|
return tpl_params->getMinRequiredArguments() < tpl_params->size();
|
|
}
|
|
|
|
template <class T> inline set<const clang::NamedDecl*> GetRedeclsOfRedeclarable(
|
|
const clang::Redeclarable<T>* decl) {
|
|
return set<const clang::NamedDecl*>(decl->redecls_begin(),
|
|
decl->redecls_end());
|
|
}
|
|
|
|
// The only way to find out whether a decl can be dyn_cast to a
|
|
// Redeclarable<T> and what T is is to enumerate the possibilities.
|
|
// Hence we hard-code the list.
|
|
set<const clang::NamedDecl*> GetNonclassRedecls(const clang::NamedDecl* decl) {
|
|
CHECK_(!isa<RecordDecl>(decl) && "For classes, call GetClassRedecls()");
|
|
CHECK_(!isa<ClassTemplateDecl>(decl) && "For tpls, call GetClassRedecls()");
|
|
if (const TagDecl* specific_decl = DynCastFrom(decl))
|
|
return GetRedeclsOfRedeclarable(specific_decl);
|
|
// TODO(wan): go through iwyu to replace TypedefDecl with
|
|
// TypedefNameDecl as needed.
|
|
if (const TypedefNameDecl* specific_decl = DynCastFrom(decl))
|
|
return GetRedeclsOfRedeclarable(specific_decl);
|
|
if (const FunctionDecl* specific_decl = DynCastFrom(decl))
|
|
return GetRedeclsOfRedeclarable(specific_decl);
|
|
if (const VarDecl* specific_decl = DynCastFrom(decl))
|
|
return GetRedeclsOfRedeclarable(specific_decl);
|
|
// Not redeclarable, so the output is just the input.
|
|
set<const clang::NamedDecl*> retval;
|
|
retval.insert(decl);
|
|
return retval;
|
|
}
|
|
|
|
set<const NamedDecl*> GetClassRedecls(const NamedDecl* decl) {
|
|
const RecordDecl* record_decl = DynCastFrom(decl);
|
|
const ClassTemplateDecl* tpl_decl = DynCastFrom(decl);
|
|
if (tpl_decl)
|
|
record_decl = tpl_decl->getTemplatedDecl();
|
|
if (!record_decl)
|
|
return set<const NamedDecl*>();
|
|
|
|
set<const NamedDecl*> redecls;
|
|
for (TagDecl::redecl_iterator it = record_decl->redecls_begin();
|
|
it != record_decl->redecls_end(); ++it) {
|
|
const RecordDecl* redecl = cast<RecordDecl>(*it);
|
|
// If this decl is a friend decl, don't count it: friend decls
|
|
// don't serve as forward-declarations. (This should never
|
|
// happen, I think, but it sometimes does due to a clang bug:
|
|
// http://llvm.org/bugs/show_bug.cgi?id=8669). The only exception
|
|
// is made because every decl is a redecl of itself.
|
|
if (IsFriendDecl(redecl) && redecl != decl)
|
|
continue;
|
|
|
|
if (tpl_decl) { // need to convert back to a ClassTemplateDecl
|
|
CHECK_(isa<CXXRecordDecl>(redecl) &&
|
|
cast<CXXRecordDecl>(redecl)->getDescribedClassTemplate());
|
|
const CXXRecordDecl* cxx_redecl = cast<CXXRecordDecl>(redecl);
|
|
redecls.insert(cxx_redecl->getDescribedClassTemplate());
|
|
} else {
|
|
redecls.insert(redecl);
|
|
}
|
|
}
|
|
return redecls;
|
|
}
|
|
|
|
const NamedDecl* GetFirstRedecl(const NamedDecl* decl) {
|
|
const NamedDecl* first_decl = decl;
|
|
FullSourceLoc first_decl_loc(GetLocation(first_decl), *GlobalSourceManager());
|
|
set<const NamedDecl*> all_redecls = GetClassRedecls(decl);
|
|
if (all_redecls.empty()) // input is not a class or class template
|
|
return NULL;
|
|
|
|
for (Each<const NamedDecl*> it(&all_redecls); !it.AtEnd(); ++it) {
|
|
const FullSourceLoc redecl_loc(GetLocation(*it), *GlobalSourceManager());
|
|
if (redecl_loc.isBeforeInTranslationUnitThan(first_decl_loc)) {
|
|
first_decl = *it;
|
|
first_decl_loc = redecl_loc;
|
|
}
|
|
}
|
|
return first_decl;
|
|
}
|
|
|
|
const NamedDecl* GetNonfriendClassRedecl(const NamedDecl* decl) {
|
|
const RecordDecl* record_decl = DynCastFrom(decl);
|
|
const ClassTemplateDecl* tpl_decl = DynCastFrom(decl);
|
|
if (tpl_decl)
|
|
record_decl = tpl_decl->getTemplatedDecl();
|
|
// This check is so we return the input decl whenever possible.
|
|
if (!record_decl || !IsFriendDecl(record_decl))
|
|
return decl;
|
|
|
|
set<const NamedDecl*> all_redecls = GetClassRedecls(decl);
|
|
CHECK_(!all_redecls.empty() && "Uncaught non-class decl");
|
|
return *all_redecls.begin(); // arbitrary choice
|
|
}
|
|
|
|
bool DeclsAreInSameClass(const Decl* decl1, const Decl* decl2) {
|
|
if (!decl1 || !decl2)
|
|
return false;
|
|
if (decl1->getDeclContext() != decl2->getDeclContext())
|
|
return false;
|
|
return decl1->getDeclContext()->isRecord();
|
|
}
|
|
|
|
|
|
// --- Utilities for Type.
|
|
|
|
const Type* GetTypeOf(const Expr* expr) {
|
|
return expr->getType().getTypePtr();
|
|
}
|
|
|
|
const Type* GetTypeOf(const ValueDecl* decl) {
|
|
return decl->getType().getTypePtr();
|
|
}
|
|
|
|
const Type* GetTypeOf(const TypeDecl* decl) {
|
|
return decl->getTypeForDecl();
|
|
}
|
|
|
|
const Type* GetCanonicalType(const Type* type) {
|
|
QualType canonical_type = type->getCanonicalTypeUnqualified();
|
|
return canonical_type.getTypePtr();
|
|
}
|
|
|
|
const Type* RemoveElaboration(const Type* type) {
|
|
if (const ElaboratedType* elaborated_type = DynCastFrom(type))
|
|
return elaborated_type->getNamedType().getTypePtr();
|
|
else
|
|
return type;
|
|
}
|
|
|
|
bool IsTemplatizedType(const Type* type) {
|
|
return (type && isa<TemplateSpecializationType>(RemoveElaboration(type)));
|
|
}
|
|
|
|
bool IsClassType(const clang::Type* type) {
|
|
return (type && (isa<TemplateSpecializationType>(RemoveElaboration(type)) ||
|
|
isa<RecordType>(RemoveElaboration(type))));
|
|
}
|
|
|
|
const Type* RemoveSubstTemplateTypeParm(const Type* type) {
|
|
if (const SubstTemplateTypeParmType* subst_type = DynCastFrom(type))
|
|
return subst_type->getReplacementType().getTypePtr();
|
|
else
|
|
return type;
|
|
}
|
|
|
|
bool IsPointerOrReferenceAsWritten(const Type* type) {
|
|
type = RemoveElaboration(type);
|
|
return isa<PointerType>(type) || isa<LValueReferenceType>(type);
|
|
}
|
|
|
|
const Type* RemovePointersAndReferencesAsWritten(const Type* type) {
|
|
type = RemoveElaboration(type);
|
|
while (isa<PointerType>(type) ||
|
|
isa<LValueReferenceType>(type)) {
|
|
type = type->getPointeeType().getTypePtr();
|
|
}
|
|
return type;
|
|
}
|
|
|
|
const Type* RemovePointerFromType(const Type* type) {
|
|
if (!IsPointerOrReferenceAsWritten(type)) { // ah well, have to desugar
|
|
type = type->getUnqualifiedDesugaredType();
|
|
}
|
|
if (!IsPointerOrReferenceAsWritten(type)) {
|
|
return NULL;
|
|
}
|
|
type = RemoveElaboration(type);
|
|
type = type->getPointeeType().getTypePtr();
|
|
return type;
|
|
}
|
|
|
|
// This follows typedefs/etc to remove pointers, if necessary.
|
|
const Type* RemovePointersAndReferences(const Type* type) {
|
|
while (1) {
|
|
const Type* deref_type = RemovePointerFromType(type);
|
|
if (deref_type == NULL) // type wasn't a pointer (or reference) type
|
|
break; // removed all pointers
|
|
type = deref_type;
|
|
}
|
|
return type;
|
|
}
|
|
|
|
const NamedDecl* TypeToDeclAsWritten(const Type* type) {
|
|
// Get past all the 'class' and 'struct' prefixes, and namespaces.
|
|
type = RemoveElaboration(type);
|
|
|
|
// Read past SubstTemplateTypeParmType (this can happen if a
|
|
// template function returns the tpl-arg type: e.g. for
|
|
// 'T MyFn<T>() {...}; MyFn<X>.a', the type of MyFn<X> will be a Subst.
|
|
type = RemoveSubstTemplateTypeParm(type);
|
|
|
|
CHECK_(!isa<ObjCObjectType>(type) && "IWYU doesn't support Objective-C");
|
|
|
|
// We have to be a bit careful about the order, because we want
|
|
// to keep typedefs as typedefs, so we do the record check last.
|
|
// We use getAs<> when we can -- unfortunately, it only exists
|
|
// for a few types so far.
|
|
if (const TypedefType* typedef_type = DynCastFrom(type)) {
|
|
return typedef_type->getDecl();
|
|
} else if (const InjectedClassNameType* icn_type
|
|
= type->getAs<InjectedClassNameType>()) {
|
|
return icn_type->getDecl();
|
|
} else if (const RecordType* record_type
|
|
= type->getAs<RecordType>()) {
|
|
return record_type->getDecl();
|
|
} else if (const TagType* tag_type = DynCastFrom(type)) {
|
|
return tag_type->getDecl(); // probably just enums
|
|
} else if (const TemplateSpecializationType* template_spec_type
|
|
= DynCastFrom(type)) {
|
|
// A non-concrete template class, such as 'Myclass<T>'
|
|
return template_spec_type->getTemplateName().getAsTemplateDecl();
|
|
} else if (const FunctionType* function_type = DynCastFrom(type)) {
|
|
// TODO(csilvers): is it possible to map from fn type to fn decl?
|
|
(void)function_type;
|
|
return NULL;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
const Type* RemoveReferenceAsWritten(const Type* type) {
|
|
if (const LValueReferenceType* ref_type = DynCastFrom(type))
|
|
return ref_type->getPointeeType().getTypePtr();
|
|
else
|
|
return type;
|
|
}
|
|
|
|
bool HasImplicitConversionConstructor(const Type* type) {
|
|
type = RemoveElaboration(type); // get rid of the class keyword
|
|
if (isa<PointerType>(type))
|
|
return false; // can't implicitly convert to a pointer
|
|
if (isa<LValueReferenceType>(type) &&
|
|
!type->getPointeeType().isConstQualified())
|
|
return false; // can't implicitly convert to a non-const reference
|
|
|
|
type = RemoveReferenceAsWritten(type);
|
|
const NamedDecl* decl = TypeToDeclAsWritten(type);
|
|
if (!decl) // not the kind of type that has a decl (e.g. built-in)
|
|
return false;
|
|
|
|
const CXXRecordDecl* cxx_class = DynCastFrom(decl);
|
|
if (!cxx_class)
|
|
return false; // can't implicitly convert to a non-class type
|
|
|
|
return HasImplicitConversionCtor(cxx_class);
|
|
}
|
|
|
|
map<const clang::Type*, const clang::Type*>
|
|
GetTplTypeResugarMapForClassNoComponentTypes(const clang::Type* type) {
|
|
map<const Type*, const Type*> retval;
|
|
type = RemoveElaboration(type); // get rid of the class keyword
|
|
const TemplateSpecializationType* tpl_spec_type = DynCastFrom(type);
|
|
if (!tpl_spec_type)
|
|
return retval;
|
|
|
|
// Get the list of template args that apply to the decls.
|
|
const NamedDecl* decl = TypeToDeclAsWritten(tpl_spec_type);
|
|
const ClassTemplateSpecializationDecl* tpl_decl = DynCastFrom(decl);
|
|
if (!tpl_decl) // probably because tpl_spec_type is a dependent type
|
|
return retval;
|
|
const TemplateArgumentList& tpl_args
|
|
= tpl_decl->getTemplateInstantiationArgs();
|
|
|
|
// TemplateSpecializationType only includes explicitly specified
|
|
// types in its args list, so we start with that. Note that an
|
|
// explicitly specified type may fulfill multiple template args:
|
|
// template <typename R, typename A1> struct Foo<R(A1)> { ... }
|
|
set<unsigned> explicit_args; // indices into tpl_args we've filled
|
|
TypeEnumerator type_enumerator;
|
|
for (unsigned i = 0; i < tpl_spec_type->getNumArgs(); ++i) {
|
|
set<const Type*> arg_components
|
|
= type_enumerator.Enumerate(tpl_spec_type->getArg(i));
|
|
// Go through all template types mentioned in the arg-as-written,
|
|
// and compare it against each of the types in the template decl
|
|
// (the latter are all desugared). If there's a match, update
|
|
// the mapping.
|
|
for (Each<const Type*> it(&arg_components); !it.AtEnd(); ++it) {
|
|
for (unsigned i = 0; i < tpl_args.size(); ++i) {
|
|
if (const Type* arg_type = GetTemplateArgAsType(tpl_args[i])) {
|
|
if (GetCanonicalType(*it) == arg_type) {
|
|
retval[arg_type] = *it;
|
|
VERRS(6) << "Adding a template-class type of interest: "
|
|
<< PrintableType(*it) << "\n";
|
|
explicit_args.insert(i);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Now take a look at the args that were not filled explicitly.
|
|
for (unsigned i = 0; i < tpl_args.size(); ++i) {
|
|
if (ContainsKey(explicit_args, i))
|
|
continue;
|
|
if (const Type* arg_type = GetTemplateArgAsType(tpl_args[i])) {
|
|
retval[arg_type] = NULL;
|
|
VERRS(6) << "Adding a template-class default type of interest: "
|
|
<< PrintableType(arg_type) << "\n";
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
map<const clang::Type*, const clang::Type*> GetTplTypeResugarMapForClass(
|
|
const clang::Type* type) {
|
|
return ResugarTypeComponents( // add in the decomposition of retval
|
|
GetTplTypeResugarMapForClassNoComponentTypes(type));
|
|
}
|
|
|
|
// --- Utilities for Stmt.
|
|
|
|
bool IsAddressOf(const Expr* expr) {
|
|
if (const UnaryOperator* unary = DynCastFrom(expr->IgnoreParens()))
|
|
return unary->getOpcode() == clang::UO_AddrOf;
|
|
return false;
|
|
}
|
|
|
|
const Type* TypeOfParentIfMethod(const CallExpr* expr) {
|
|
// callee_expr is a MemberExpr if we're a normal class method, or
|
|
// DeclRefExpr if we're a static class method or an overloaded operator.
|
|
const Expr* callee_expr = expr->getCallee()->IgnoreParenCasts();
|
|
if (const MemberExpr* member_expr = DynCastFrom(callee_expr)) {
|
|
const Type* class_type = GetTypeOf(member_expr->getBase());
|
|
// For class->member(), class_type is a pointer.
|
|
return RemovePointersAndReferencesAsWritten(class_type);
|
|
} else if (const DeclRefExpr* ref_expr = DynCastFrom(callee_expr)) {
|
|
if (ref_expr->getQualifier()) { // static methods like C<T>::a()
|
|
return ref_expr->getQualifier()->getAsType();
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
const Expr* GetFirstClassArgument(CallExpr* expr) {
|
|
for (CallExpr::arg_iterator it = expr->arg_begin();
|
|
it != expr->arg_end(); ++it) {
|
|
const Type* argtype = GetTypeOf(*it);
|
|
// Make sure we do the right thing given a function like
|
|
// template <typename T> void operator>>(const T& x, ostream& os);
|
|
// In this case ('myclass >> os'), we want to be returning the
|
|
// type of os, not of myclass, and we do, because myclass will be
|
|
// a SubstTemplateTypeParmType, not a RecordType.
|
|
if (isa<SubstTemplateTypeParmType>(argtype))
|
|
continue;
|
|
argtype = argtype->getUnqualifiedDesugaredType(); // see through typedefs
|
|
if (isa<RecordType>(argtype) ||
|
|
isa<TemplateSpecializationType>(argtype)) {
|
|
return *it;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
const CXXDestructorDecl* GetDestructorForDeleteExpr(const CXXDeleteExpr* expr) {
|
|
const Type* type = expr->getDestroyedType().getTypePtrOrNull();
|
|
// type is NULL when deleting a dependent type: 'T foo; delete foo'
|
|
if (type == NULL)
|
|
return NULL;
|
|
const NamedDecl* decl = TypeToDeclAsWritten(type);
|
|
if (const CXXRecordDecl* cxx_record = DynCastFrom(decl))
|
|
return cxx_record->getDestructor();
|
|
return NULL;
|
|
}
|
|
|
|
const CXXDestructorDecl* GetSiblingDestructorFor(
|
|
const CXXConstructorDecl* ctor) {
|
|
return ctor ? ctor->getParent()->getDestructor() : NULL;
|
|
}
|
|
|
|
const CXXDestructorDecl* GetSiblingDestructorFor(
|
|
const CXXConstructExpr* ctor_expr) {
|
|
return GetSiblingDestructorFor(ctor_expr->getConstructor());
|
|
}
|
|
|
|
const FunctionType* GetCalleeFunctionType(CallExpr* expr) {
|
|
const Type* callee_type = expr->getCallee()->getType().getTypePtr();
|
|
if (const PointerType* ptr_type
|
|
= callee_type->getAs<PointerType>()) {
|
|
callee_type = ptr_type->getPointeeType().getTypePtr();
|
|
} else if (const BlockPointerType* bptr_type
|
|
= callee_type->getAs<BlockPointerType>()) {
|
|
callee_type = bptr_type->getPointeeType().getTypePtr();
|
|
} else if (const MemberPointerType* mptr_type
|
|
= callee_type->getAs<MemberPointerType>()) {
|
|
callee_type = mptr_type->getPointeeType().getTypePtr();
|
|
}
|
|
return callee_type->getAs<FunctionType>();
|
|
}
|
|
|
|
bool IsCastToReferenceType(const CastExpr* expr) {
|
|
if (const ExplicitCastExpr* explicit_cast = DynCastFrom(expr)) {
|
|
return explicit_cast->getTypeAsWritten()->isReferenceType();
|
|
} else if (const ImplicitCastExpr* implicit_cast = DynCastFrom(expr)) {
|
|
return implicit_cast->getValueKind() == clang::VK_LValue;
|
|
} else {
|
|
CHECK_(false && "Unexpected type of cast expression");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
const ASTTemplateArgumentListInfo* GetExplicitTplArgs(const Expr* expr) {
|
|
if (const DeclRefExpr* decl_ref = DynCastFrom(expr))
|
|
return decl_ref->getOptionalExplicitTemplateArgs();
|
|
if (const MemberExpr* member_expr = DynCastFrom(expr))
|
|
return member_expr->getOptionalExplicitTemplateArgs();
|
|
// Ugh, annoying casts needed because no const methods exist.
|
|
if (const OverloadExpr* overload_expr = DynCastFrom(expr))
|
|
return const_cast<OverloadExpr*>(overload_expr)
|
|
->getOptionalExplicitTemplateArgs();
|
|
if (const DependentScopeDeclRefExpr* dependent_decl_ref = DynCastFrom(expr))
|
|
return const_cast<DependentScopeDeclRefExpr*>(dependent_decl_ref)
|
|
->getOptionalExplicitTemplateArgs();
|
|
return NULL;
|
|
}
|
|
|
|
} // namespace include_what_you_use
|