1/* Parser header
2   Copyright (C) 2003-2020 Free Software Foundation, Inc.
3   Contributed by Steven Bosscher
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 3, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING3.  If not see
19<http://www.gnu.org/licenses/>.  */
20
21
22#ifndef GFC_PARSE_H
23#define GFC_PARSE_H
24
25/* Enum for what the compiler is currently doing.  */
26enum gfc_compile_state
27{
28  COMP_NONE, COMP_PROGRAM, COMP_MODULE, COMP_SUBMODULE, COMP_SUBROUTINE,
29  COMP_FUNCTION, COMP_BLOCK_DATA, COMP_INTERFACE, COMP_DERIVED,
30  COMP_DERIVED_CONTAINS, COMP_BLOCK, COMP_ASSOCIATE, COMP_IF,
31  COMP_STRUCTURE, COMP_UNION, COMP_MAP,
32  COMP_DO, COMP_SELECT, COMP_FORALL, COMP_WHERE, COMP_CONTAINS, COMP_ENUM,
33  COMP_SELECT_TYPE, COMP_SELECT_RANK, COMP_OMP_STRUCTURED_BLOCK, COMP_CRITICAL,
34  COMP_DO_CONCURRENT
35};
36
37/* Stack element for the current compilation state.  These structures
38   are allocated as automatic variables.  */
39typedef struct gfc_state_data
40{
41  gfc_compile_state state;
42  gfc_symbol *sym;              /* Block name associated with this level */
43  gfc_symtree *do_variable;     /* For DO blocks the iterator variable.  */
44
45  struct gfc_code *construct;
46  struct gfc_code *head, *tail;
47  struct gfc_state_data *previous;
48
49  /* Block-specific state data.  */
50  union
51  {
52    gfc_st_label *end_do_label;
53    gfc_oacc_declare *oacc_declare_clauses;
54  }
55  ext;
56}
57gfc_state_data;
58
59extern gfc_state_data *gfc_state_stack;
60
61#define gfc_current_block() (gfc_state_stack->sym)
62#define gfc_current_state() (gfc_state_stack->state)
63#define gfc_comp_struct(s) \
64  ((s) == COMP_DERIVED || (s) == COMP_STRUCTURE || (s) == COMP_MAP)
65
66int gfc_check_do_variable (gfc_symtree *);
67bool gfc_find_state (gfc_compile_state);
68gfc_state_data *gfc_enclosing_unit (gfc_compile_state *);
69const char *gfc_ascii_statement (gfc_statement);
70match gfc_match_enum (void);
71match gfc_match_enumerator_def (void);
72void gfc_free_enum_history (void);
73extern bool gfc_matching_function;
74match gfc_match_prefix (gfc_typespec *);
75bool is_oacc (gfc_state_data *);
76#endif  /* GFC_PARSE_H  */
77