Add basic libclang parsing infrastructure

include/cppast/libclang_parser.hpp

@@ -0,0 +1,44 @@
+// Copyright (C) 2017 Jonathan Müller <jonathanmueller.dev@gmail.com>
+// This file is subject to the license terms in the LICENSE file
+// found in the top-level directory of this distribution.
+
+#ifndef CPPAST_LIBCLANG_PARSER_HPP_INCLUDED
+#define CPPAST_LIBCLANG_PARSER_HPP_INCLUDED
+
+#include <cppast/parser.hpp>
+
+namespace cppast
+{
+    /// Compilation config for the [cppast::libclang_parser]().
+    class libclang_compile_config final : public compile_config
+    {
+    public:
+        libclang_compile_config();
+
+    private:
+        void do_set_flags(cpp_standard standard, type_safe::flag_set<compile_flag> flags) override;
+
+        void do_add_include_dir(std::string path) override;
+
+        void do_add_macro_definition(std::string name, std::string definition) override;
+
+        void do_remove_macro_definition(std::string name) override;
+    };
+
+    /// A parser that uses libclang.
+    class libclang_parser final : public parser
+    {
+    public:
+        libclang_parser();
+        ~libclang_parser() noexcept override;
+
+    private:
+        std::unique_ptr<cpp_file> do_parse(const cpp_entity_index& idx, const std::string& path,
+                                           const compile_config& config) const override;
+
+        struct impl;
+        std::unique_ptr<impl> pimpl_;
+    };
+} // namespace cppast
+
+#endif // CPPAST_LIBCLANG_PARSER_HPP_INCLUDED