Revert 69187, http://codereview.chromium.org/5730003/. DEPS check failed due...

ppapi/tests/clang/find_affected_interfaces.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Clang plugin which finds types that are affected if the types listed in the
-// plugin parameters are changed.  This is for use in determining what PPAPI
-// C-level interfaces are affected if one or more PPAPI C structs are changed.
-
-#include <algorithm>
-#include <cstdio>
-#include <map>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include "clang/AST/AST.h"
-#include "clang/AST/ASTConsumer.h"
-#include "clang/AST/CharUnits.h"
-#include "clang/Basic/SourceManager.h"
-#include "clang/Basic/TargetInfo.h"
-#include "clang/Frontend/CompilerInstance.h"
-#include "clang/Frontend/FrontendPluginRegistry.h"
-
-namespace {
-
-typedef std::vector<std::string> StringVec;
-
-class FindAffectedInterfacesConsumer : public clang::ASTConsumer {
- public:
-  explicit FindAffectedInterfacesConsumer(const StringVec& changed_classes) {
-    StringVec::const_iterator iter(changed_classes.begin());
-    StringVec::const_iterator the_end(changed_classes.end());
-    for (; iter != the_end; ++iter) {
-      class_is_affected_map_[*iter] = true;
-    }
-  }
-
- private:
-  typedef std::map<std::string, bool> StringBoolMap;
-  StringBoolMap class_is_affected_map_;
-
-  bool IsAffected(const clang::Type& type_to_check) {
-    std::string type_string(
-      type_to_check.getCanonicalTypeInternal().getAsString());
-    std::pair<StringBoolMap::iterator, bool> iter_success_pair =
-        class_is_affected_map_.insert(
-            StringBoolMap::value_type(type_string, false));
-    StringBoolMap::iterator iter(iter_success_pair.first);
-    bool successfully_inserted(iter_success_pair.second);
-    // If we were able to insert, then we haven't yet seen this type.  Compute
-    // IsAffected and put it at the newly inserted location in the map.
-    if (successfully_inserted) {
-      if (type_to_check.isPointerType()) {
-        const clang::PointerType* pointer_type =
-            dyn_cast<clang::PointerType>(&type_to_check);
-        // Recurse to the pointee type.
-        iter->second = IsAffected(*pointer_type->getPointeeType().getTypePtr());
-      } else if (type_to_check.isFunctionProtoType()) {
-        const clang::FunctionProtoType* func_type =
-            dyn_cast<clang::FunctionProtoType>(&type_to_check);
-        // Recurse to the return type and parameter types.
-        iter->second = IsAffected(*func_type->getResultType().getTypePtr());
-        if (!iter->second) {
-          clang::FunctionProtoType::arg_type_iterator arg_iter =
-              func_type->arg_type_begin();
-          clang::FunctionProtoType::arg_type_iterator arg_end =
-              func_type->arg_type_end();
-          for (; (arg_iter != arg_end) && (!iter->second); ++arg_iter) {
-            iter->second = IsAffected(*(arg_iter->getTypePtr()));
-          }
-        }
-      } else if (type_to_check.isRecordType()) {
-        // For records (unions, structs), recurse to the fields.
-        const clang::RecordType* record =
-            dyn_cast<clang::RecordType>(&type_to_check);
-        const clang::RecordDecl* decl = record->getDecl();
-        clang::RecordDecl::field_iterator field_iter(decl->field_begin());
-        clang::RecordDecl::field_iterator field_end(decl->field_end());
-        for (; (field_iter != field_end) && (!iter->second); ++field_iter) {
-          iter->second = IsAffected(*(field_iter->getType().getTypePtr()));
-        }
-      }
-    }
-    // By this point, the bool in the map at the location referenced by iter has
-    // the correct value.  Either it was cached, or we computed & inserted it.
-    return iter->second;
-  }
-
-  // Virtual function to consume top-level declarations.  For each one, we check
-  // to see if it is a type definition.  If it is, we print information about
-  // it.
-  virtual void HandleTopLevelDecl(clang::DeclGroupRef decl_group) {
-    clang::DeclGroupRef::iterator iter(decl_group.begin());
-    clang::DeclGroupRef::iterator the_end(decl_group.end());
-    for (; iter != the_end; ++iter) {
-      const clang::Decl *decl = *iter;
-      if (const clang::TypeDecl* type_decl = dyn_cast<clang::TypeDecl>(decl)) {
-        std::string name(type_decl->getNameAsString());
-        // TagDecl covers structs, enums, unions, and classes.
-        if (const clang::TagDecl* tag = dyn_cast<clang::TagDecl>(type_decl)) {
-          // Only print out info when we find the definition;  ignore forward
-          // references.
-          if (tag->isDefinition()) {
-            clang::Type* type = type_decl->getTypeForDecl();
-            if (IsAffected(*type)) {
-              std::printf("%s\n", name.c_str());
-            }
-          }
-        } else if (const clang::TypedefDecl* td =
-                   dyn_cast<clang::TypedefDecl>(type_decl)) {
-          clang::Type* type = td->getUnderlyingType().getTypePtr();
-          if (IsAffected(*type)) {
-            std::printf("%s\n", name.c_str());
-          }
-        }
-      }
-    }
-  }
-};
-
-class FindAffectedInterfacesAction : public clang::PluginASTAction {
- public:
-  FindAffectedInterfacesAction() {}
-
- private:
-  StringVec types_;
-
-  virtual clang::ASTConsumer *CreateASTConsumer(
-      clang::CompilerInstance &instance, llvm::StringRef /*input_file*/) {
-    return new FindAffectedInterfacesConsumer(types_);
-  }
-
-  virtual bool ParseArgs(const clang::CompilerInstance& /*instance*/,
-                         const std::vector<std::string>& args) {
-    // Every argument is interpreted as a comma-delimited list of names of types
-    // that have been changed.
-    StringVec::const_iterator iter(args.begin()), end(args.end());
-    for (; iter != end; ++iter) {
-      std::stringstream stream(*iter);
-      std::string type_name;
-      while (std::getline(stream, type_name, ',')) {
-        types_.push_back(type_name);
-      }
-    }
-    return true;
-  }
-};
-
-}  // namespace
-
-static clang::FrontendPluginRegistry::Add<FindAffectedInterfacesAction>
-X("FindAffectedInterfaces",
-  "Find interfaces affected by changes to the passes classes.");
-