tion_t, struct c_enum_contents *, tree);
extern int  start_function (struct c_declspecs *, struct c_declarator *, tree);
extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool,
			tree);
extern tree start_struct (location_t, enum tree_code, tree,
			  struct c_struct_parse_info **);
extern void store_parm_decls (void);
extern void store_parm_decls_from (struct c_arg_info *);
extern void temp_store_parm_decls (tree, tree);
extern void temp_pop_parm_decls (void);
extern tree xref_tag (enum tree_code, tree);
extern struct c_typespec parser_xref_tag (location_t, enum tree_code, tree);
extern struct c_parm *build_c_parm (struct c_declspecs *, tree,
				    struct c_declarator *);
extern struct c_declarator *build_attrs_declarator (tree,
						    struct c_declarator *);
extern struct c_declarator *build_function_declarator (struct c_arg_info *,
						       struct c_declarator *);
extern struct c_declarator *build_id_declarator (tree);
extern struct c_declarator *make_pointer_declarator (struct c_declspecs *,
						     struct c_declarator *);
extern struct c_declspecs *build_null_declspecs (void);
extern struct c_declspecs *declspecs_add_qual (source_location,
					       struct c_declspecs *, tree);
extern struct c_declspecs *declspecs_add_type (location_t,
					       struct c_declspecs *,
					       struct c_typespec);
extern struct c_declspecs *declspecs_add_scspec (source_location,
						 struct c_declspecs *, tree);
extern struct c_declspecs *declspecs_add_attrs (source_location,
						struct c_declspecs *, tree);
extern struct c_declspecs *declspecs_add_addrspace (source_location,
						    struct c_declspecs *,
						    addr_space_t);
extern struct c_declspecs *declspecs_add_alignas (source_location,
						  struct c_declspecs *, tree);
extern struct c_declspecs *finish_declspecs (struct c_declspecs *);

/* in c-objc-common.c */
extern bool c_objc_common_init (void);
extern bool c_missing_noreturn_ok_p (tree);
extern bool c_warn_unused_global_decl (const_tree);
extern void c_initialize_diagnostics (diagnostic_context *);
extern bool c_vla_unspec_p (tree x, tree fn);

/* in c-typeck.c */
extern int in_alignof;
extern int in_sizeof;
extern int in_typeof;

extern tree c_last_sizeof_arg;

extern struct c_switch *c_switch_stack;

extern tree c_objc_common_truthvalue_conversion (location_t, tree);
extern tree require_complete_type (location_t, tree);
extern int same_translation_unit_p (const_tree, const_tree);
extern int comptypes (tree, tree);
extern int comptypes_check_different_types (tree, tree, bool *);
extern bool c_vla_type_p (const_tree);
extern bool c_mark_addressable (tree, bool = false);
extern void c_incomplete_type_error (location_t, const_tree, const_tree);
extern tree c_type_promotes_to (tree);
extern struct c_expr default_function_array_conversion (location_t,
							struct c_expr);
extern struct c_expr default_function_array_read_conversion (location_t,
							     struct c_expr);
extern struct c_expr convert_lvalue_to_rvalue (location_t, struct c_expr,
					       bool, bool);
extern void mark_exp_read (tree);
extern tree composite_type (tree, tree);
extern tree build_component_ref (location_t, tree, tree, location_t);
extern tree build_array_ref (location_t, tree, tree);
extern tree build_external_ref (location_t, tree, int, tree *);
extern void pop_maybe_used (bool);
extern struct c_expr c_expr_sizeof_expr (location_t, struct c_expr);
extern struct c_expr c_expr_sizeof_type (location_t, struct c_type_name *);
extern struct c_expr parser_build_unary_op (location_t, enum tree_code,
    					    struct c_expr);
extern struct c_expr parser_build_binary_op (location_t,
    					     enum tree_code, struct c_expr,
					     struct c_expr);
extern tree build_conditional_expr (location_t, tree, bool, tree, tree,
				    tree, tree);
extern tree build_compound_expr (location_t, tree, tree);
extern tree c_cast_expr (location_t, struct c_type_name *, tree);
extern tree build_c_cast (location_t, tree, tree);
extern void store_init_value (location_t, tree, tree, tree);
extern void maybe_warn_string_init (location_t, tree, struct c_expr);
extern void start_init (tree, tree, int, rich_location *);
extern void finish_init (void);
extern void really_start_incremental_init (tree);
extern void finish_implicit_inits (location_t, struct obstack *);
extern void push_init_level (location_t, int, struct obstack *);
extern struct c_expr pop_init_level (location_t, int, struct obstack *,
				     location_t);
extern void set_init_index (location_t, tree, tree, struct obstack *);
extern void set_init_label (location_t, tree, location_t, struct obstack *);
extern void process_init_element (location_t, struct c_expr, bool,
				  struct obstack *);
extern tree build_compound_literal (location_t, tree, tree, bool);
extern void check_compound_literal_type (location_t, struct c_type_name *);
extern tree c_start_case (location_t, location_t, tree, bool);
extern void c_finish_case (tree, tree);
extern tree build_asm_expr (location_t, tree, tree, tree, tree, tree, bool);
extern tree build_asm_stmt (tree, tree);
extern int c_types_compatible_p (tree, tree);
extern tree c_begin_compound_stmt (bool);
extern tree c_end_compound_stmt (location_t, tree, bool);
extern void c_finish_if_stmt (location_t, tree, tree, tree);
extern void c_finish_loop (location_t, tree, tree, tree, tree, tree, bool);
extern tree c_begin_stmt_expr (void);
extern tree c_finish_stmt_expr (location_t, tree);
extern tree c_process_expr_stmt (location_t, tree);
extern tree c_finish_expr_stmt (location_t, tree);
extern tree c_finish_return (location_t, tree, tree);
extern tree c_finish_bc_stmt (location_t, tree *, bool);
extern tree c_finish_goto_label (location_t, tree);
extern tree c_finish_goto_ptr (location_t, tree);
extern tree c_expr_to_decl (tree, bool *, bool *);
extern tree c_finish_omp_construct (location_t, enum tree_code, tree, tree);
extern tree c_finish_oacc_data (location_t, tree, tree);
extern tree c_finish_oacc_host_data (location_t, tree, tree);
extern tree c_begin_omp_parallel (void);
extern tree c_finish_omp_parallel (location_t, tree, tree);
extern tree c_begin_omp_task (void);
extern tree c_finish_omp_task (location_t, tree, tree);
extern void c_finish_omp_cancel (location_t, tree);
extern void c_finish_omp_cancellation_point (location_t, tree);
extern tree c_finish_omp_clauses (tree, enum c_omp_region_type);
extern tree c_build_va_arg (location_t, tree, location_t, tree);
extern tree c_finish_transaction (location_t, tree, int);
extern bool c_tree_equal (tree, tree);
extern tree c_build_function_call_vec (location_t, vec<location_t>, tree,
				       vec<tree, va_gc> *, vec<tree, va_gc> *);
extern tree c_omp_clause_copy_ctor (tree, tree, tree);

/* Set to 0 at beginning of a function definition, set to 1 if
   a return statement that specifies a return value is seen.  */

extern int current_function_returns_value;

/* Set to 0 at beginning of a function definition, set to 1 if
   a return statement with no argument is seen.  */

extern int current_function_returns_null;

/* Set to 0 at beginning of a function definition, set to 1 if
   a call to a noreturn function is seen.  */

extern int current_function_returns_abnormally;

/* In c-decl.c */

/* Tell the binding oracle what kind of binding we are looking for.  */

enum c_oracle_request
{
  C_ORACLE_SYMBOL,
  C_ORACLE_TAG,
  C_ORACLE_LABEL
};

/* If this is non-NULL, then it is a "binding oracle" which can lazily
   create bindings when needed by the C compiler.  The oracle is told
   the name and type of the binding to create.  It can call pushdecl
   or the like to ensure the binding is visible; or do nothing,
   leaving the binding untouched.  c-decl.c takes note of when the
   oracle has been called and will not call it again if it fails to
   create a given binding.  */

typedef void c_binding_oracle_function (enum c_oracle_request, tree identifier);

extern c_binding_oracle_function *c_binding_oracle;

extern void c_finish_incomplete_decl (tree);
extern tree c_omp_reduction_id (enum tree_code, tree);
extern tree c_omp_reduction_decl (tree);
extern tree c_omp_reduction_lookup (tree, tree);
extern tree c_check_omp_declare_reduction_r (tree *, int *, void *);
extern void c_pushtag (location_t, tree, tree);
extern void c_bind (location_t, tree, bool);
extern bool tag_exists_p (enum tree_code, tree);

/* In c-errors.c */
extern bool pedwarn_c90 (location_t, int opt, const char *, ...)
    ATTRIBUTE_GCC_DIAG(3,4);
extern bool pedwarn_c99 (location_t, int opt, const char *, ...)
    ATTRIBUTE_GCC_DIAG(3,4);

extern void
set_c_expr_source_range (c_expr *expr,
			 location_t start, location_t finish);

extern void
set_c_expr_source_range (c_expr *expr,
			 source_range src_range);

/* In c-fold.c */
extern tree decl_constant_value_for_optimization (tree);

extern vec<tree> incomplete_record_decls;

#endif /* ! GCC_C_TREE_H */