// Clang plugin declaration
// Copyright (C) 2024  Nguyễn Gia Phong
//
// This file is part of GoatC.
//
// GoatC is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GoatC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GoatC.  If not, see <https://www.gnu.org/licenses/>.

#include <clang/AST/RecursiveASTVisitor.h>
#include <clang/Frontend/FrontendPluginRegistry.h>

namespace goatc
{
  class Visitor : public clang::RecursiveASTVisitor <Visitor> {
    clang::ASTContext* ctx;

  public:
    Visitor(clang::ASTContext* ctx) : ctx {ctx}
    { }

    bool VisitDecl (clang::Decl*);
  };

  class Consumer : public clang::ASTConsumer {
    Visitor visitor;
    /// Consuming source file that is not patched
    bool noop;

    void HandleTranslationUnit (clang::ASTContext&) override;

  public:
    Consumer (clang::ASTContext* ctx, bool noop) : visitor {ctx}, noop {noop}
    { }
  };

  class Action : public clang::PluginASTAction {
    std::string source_file;

    std::unique_ptr <clang::ASTConsumer> CreateASTConsumer
      (clang::CompilerInstance&, llvm::StringRef) override;

    bool ParseArgs (const clang::CompilerInstance&,
                    const std::vector <std::string>&) override;

    clang::PluginASTAction::ActionType getActionType () override;
  };
} // namespace goatc

static clang::FrontendPluginRegistry::Add <goatc::Action>
X {"goatc", "chimera breeder"};