/* Parser header
   Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   Free Software Foundation, Inc.
   Contributed by Steven Bosscher

This file is part of GCC.

GCC 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, or (at your option) any later
version.

GCC 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 GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */


#ifndef GFC_PARSE_H
#define GFC_PARSE_H

/* Enum for what the compiler is currently doing.  */
typedef enum
{
  COMP_NONE, COMP_PROGRAM, COMP_MODULE, COMP_SUBROUTINE, COMP_FUNCTION,
  COMP_BLOCK_DATA, COMP_INTERFACE, COMP_DERIVED, COMP_DERIVED_CONTAINS,
  COMP_BLOCK, COMP_ASSOCIATE, COMP_IF,
  COMP_DO, COMP_SELECT, COMP_FORALL, COMP_WHERE, COMP_CONTAINS, COMP_ENUM,
  COMP_SELECT_TYPE, COMP_OMP_STRUCTURED_BLOCK, COMP_CRITICAL, COMP_DO_CONCURRENT
}
gfc_compile_state;

/* Stack element for the current compilation state.  These structures
   are allocated as automatic variables.  */
typedef struct gfc_state_data
{
  gfc_compile_state state;
  gfc_symbol *sym;              /* Block name associated with this level */
  gfc_symtree *do_variable;     /* For DO blocks the iterator variable.  */

  struct gfc_code *construct;
  struct gfc_code *head, *tail;
  struct gfc_state_data *previous;

  /* Block-specific state data.  */
  union
  {
    gfc_st_label *end_do_label;
  }
  ext;
}
gfc_state_data;

extern gfc_state_data *gfc_state_stack;

#define gfc_current_block() (gfc_state_stack->sym)
#define gfc_current_state() (gfc_state_stack->state)

int gfc_check_do_variable (gfc_symtree *);
gfc_try gfc_find_state (gfc_compile_state);
gfc_state_data *gfc_enclosing_unit (gfc_compile_state *);
const char *gfc_ascii_statement (gfc_statement);
match gfc_match_enum (void);
match gfc_match_enumerator_def (void);
void gfc_free_enum_history (void);
extern bool gfc_matching_function;
match gfc_match_prefix (gfc_typespec *);
#endif  /* GFC_PARSE_H  */