diff --git a/code/src/grammar/location.hh b/code/src/grammar/location.hh
deleted file mode 100644
index 51ac45302391f6993beb33600b470c5fcd28996a..0000000000000000000000000000000000000000
--- a/code/src/grammar/location.hh
+++ /dev/null
@@ -1,304 +0,0 @@
-// A Bison parser, made by GNU Bison 3.7.6.
-
-// Locations for Bison parsers in C++
-
-// Copyright (C) 2002-2015, 2018-2021 Free Software Foundation, Inc.
-
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// This program 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 General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-// As a special exception, you may create a larger work that contains
-// part or all of the Bison parser skeleton and distribute that work
-// under terms of your choice, so long as that work isn't itself a
-// parser generator using the skeleton or a modified version thereof
-// as a parser skeleton.  Alternatively, if you modify or redistribute
-// the parser skeleton itself, you may (at your option) remove this
-// special exception, which will cause the skeleton and the resulting
-// Bison output files to be licensed under the GNU General Public
-// License without this special exception.
-
-// This special exception was added by the Free Software Foundation in
-// version 2.2 of Bison.
-
-/**
- ** \file /home/cggwz/compiler_game/magic_misaka/code/src/grammar/location.hh
- ** Define the yy::location class.
- */
-
-#ifndef YY_YY_HOME_CGGWZ_COMPILER_GAME_MAGIC_MISAKA_CODE_SRC_GRAMMAR_LOCATION_HH_INCLUDED
-# define YY_YY_HOME_CGGWZ_COMPILER_GAME_MAGIC_MISAKA_CODE_SRC_GRAMMAR_LOCATION_HH_INCLUDED
-
-# include <iostream>
-# include <string>
-
-# ifndef YY_NULLPTR
-#  if defined __cplusplus
-#   if 201103L <= __cplusplus
-#    define YY_NULLPTR nullptr
-#   else
-#    define YY_NULLPTR 0
-#   endif
-#  else
-#   define YY_NULLPTR ((void*)0)
-#  endif
-# endif
-
-namespace yy {
-#line 58 "/home/cggwz/compiler_game/magic_misaka/code/src/grammar/location.hh"
-
-  /// A point in a source file.
-  class position
-  {
-  public:
-    /// Type for file name.
-    typedef const std::string filename_type;
-    /// Type for line and column numbers.
-    typedef int counter_type;
-
-    /// Construct a position.
-    explicit position (filename_type* f = YY_NULLPTR,
-                       counter_type l = 1,
-                       counter_type c = 1)
-      : filename (f)
-      , line (l)
-      , column (c)
-    {}
-
-
-    /// Initialization.
-    void initialize (filename_type* fn = YY_NULLPTR,
-                     counter_type l = 1,
-                     counter_type c = 1)
-    {
-      filename = fn;
-      line = l;
-      column = c;
-    }
-
-    /** \name Line and Column related manipulators
-     ** \{ */
-    /// (line related) Advance to the COUNT next lines.
-    void lines (counter_type count = 1)
-    {
-      if (count)
-        {
-          column = 1;
-          line = add_ (line, count, 1);
-        }
-    }
-
-    /// (column related) Advance to the COUNT next columns.
-    void columns (counter_type count = 1)
-    {
-      column = add_ (column, count, 1);
-    }
-    /** \} */
-
-    /// File name to which this position refers.
-    filename_type* filename;
-    /// Current line number.
-    counter_type line;
-    /// Current column number.
-    counter_type column;
-
-  private:
-    /// Compute max (min, lhs+rhs).
-    static counter_type add_ (counter_type lhs, counter_type rhs, counter_type min)
-    {
-      return lhs + rhs < min ? min : lhs + rhs;
-    }
-  };
-
-  /// Add \a width columns, in place.
-  inline position&
-  operator+= (position& res, position::counter_type width)
-  {
-    res.columns (width);
-    return res;
-  }
-
-  /// Add \a width columns.
-  inline position
-  operator+ (position res, position::counter_type width)
-  {
-    return res += width;
-  }
-
-  /// Subtract \a width columns, in place.
-  inline position&
-  operator-= (position& res, position::counter_type width)
-  {
-    return res += -width;
-  }
-
-  /// Subtract \a width columns.
-  inline position
-  operator- (position res, position::counter_type width)
-  {
-    return res -= width;
-  }
-
-  /** \brief Intercept output stream redirection.
-   ** \param ostr the destination output stream
-   ** \param pos a reference to the position to redirect
-   */
-  template <typename YYChar>
-  std::basic_ostream<YYChar>&
-  operator<< (std::basic_ostream<YYChar>& ostr, const position& pos)
-  {
-    if (pos.filename)
-      ostr << *pos.filename << ':';
-    return ostr << pos.line << '.' << pos.column;
-  }
-
-  /// Two points in a source file.
-  class location
-  {
-  public:
-    /// Type for file name.
-    typedef position::filename_type filename_type;
-    /// Type for line and column numbers.
-    typedef position::counter_type counter_type;
-
-    /// Construct a location from \a b to \a e.
-    location (const position& b, const position& e)
-      : begin (b)
-      , end (e)
-    {}
-
-    /// Construct a 0-width location in \a p.
-    explicit location (const position& p = position ())
-      : begin (p)
-      , end (p)
-    {}
-
-    /// Construct a 0-width location in \a f, \a l, \a c.
-    explicit location (filename_type* f,
-                       counter_type l = 1,
-                       counter_type c = 1)
-      : begin (f, l, c)
-      , end (f, l, c)
-    {}
-
-
-    /// Initialization.
-    void initialize (filename_type* f = YY_NULLPTR,
-                     counter_type l = 1,
-                     counter_type c = 1)
-    {
-      begin.initialize (f, l, c);
-      end = begin;
-    }
-
-    /** \name Line and Column related manipulators
-     ** \{ */
-  public:
-    /// Reset initial location to final location.
-    void step ()
-    {
-      begin = end;
-    }
-
-    /// Extend the current location to the COUNT next columns.
-    void columns (counter_type count = 1)
-    {
-      end += count;
-    }
-
-    /// Extend the current location to the COUNT next lines.
-    void lines (counter_type count = 1)
-    {
-      end.lines (count);
-    }
-    /** \} */
-
-
-  public:
-    /// Beginning of the located region.
-    position begin;
-    /// End of the located region.
-    position end;
-  };
-
-  /// Join two locations, in place.
-  inline location&
-  operator+= (location& res, const location& end)
-  {
-    res.end = end.end;
-    return res;
-  }
-
-  /// Join two locations.
-  inline location
-  operator+ (location res, const location& end)
-  {
-    return res += end;
-  }
-
-  /// Add \a width columns to the end position, in place.
-  inline location&
-  operator+= (location& res, location::counter_type width)
-  {
-    res.columns (width);
-    return res;
-  }
-
-  /// Add \a width columns to the end position.
-  inline location
-  operator+ (location res, location::counter_type width)
-  {
-    return res += width;
-  }
-
-  /// Subtract \a width columns to the end position, in place.
-  inline location&
-  operator-= (location& res, location::counter_type width)
-  {
-    return res += -width;
-  }
-
-  /// Subtract \a width columns to the end position.
-  inline location
-  operator- (location res, location::counter_type width)
-  {
-    return res -= width;
-  }
-
-  /** \brief Intercept output stream redirection.
-   ** \param ostr the destination output stream
-   ** \param loc a reference to the location to redirect
-   **
-   ** Avoid duplicate information.
-   */
-  template <typename YYChar>
-  std::basic_ostream<YYChar>&
-  operator<< (std::basic_ostream<YYChar>& ostr, const location& loc)
-  {
-    location::counter_type end_col
-      = 0 < loc.end.column ? loc.end.column - 1 : 0;
-    ostr << loc.begin;
-    if (loc.end.filename
-        && (!loc.begin.filename
-            || *loc.begin.filename != *loc.end.filename))
-      ostr << '-' << loc.end.filename << ':' << loc.end.line << '.' << end_col;
-    else if (loc.begin.line < loc.end.line)
-      ostr << '-' << loc.end.line << '.' << end_col;
-    else if (loc.begin.column < end_col)
-      ostr << '-' << end_col;
-    return ostr;
-  }
-
-} // yy
-#line 303 "/home/cggwz/compiler_game/magic_misaka/code/src/grammar/location.hh"
-
-#endif // !YY_YY_HOME_CGGWZ_COMPILER_GAME_MAGIC_MISAKA_CODE_SRC_GRAMMAR_LOCATION_HH_INCLUDED
diff --git a/code/src/grammar/position.hh b/code/src/grammar/position.hh
deleted file mode 100644
index 6575075df1ad61270c3f7cd42643f0307b57d944..0000000000000000000000000000000000000000
--- a/code/src/grammar/position.hh
+++ /dev/null
@@ -1,11 +0,0 @@
-// A Bison parser, made by GNU Bison 3.7.6.
-
-// Starting with Bison 3.2, this file is useless: the structure it
-// used to define is now defined in "location.hh".
-//
-// To get rid of this file:
-// 1. add '%require "3.2"' (or newer) to your grammar file
-// 2. remove references to this file from your build system
-// 3. if you used to include it, include "location.hh" instead.
-
-#include "location.hh"
diff --git a/code/src/grammar/stack.hh b/code/src/grammar/stack.hh
deleted file mode 100644
index e6c46cc8d62f44563bfc05d4eb598371b04b58c3..0000000000000000000000000000000000000000
--- a/code/src/grammar/stack.hh
+++ /dev/null
@@ -1,8 +0,0 @@
-// A Bison parser, made by GNU Bison 3.7.6.
-
-// Starting with Bison 3.2, this file is useless: the structure it
-// used to define is now defined with the parser itself.
-//
-// To get rid of this file:
-// 1. add '%require "3.2"' (or newer) to your grammar file
-// 2. remove references to this file from your build system.