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/* Parser definitions for GDB.

   Copyright 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,

   1998, 1999, 2000 Free Software Foundation, Inc.

   Modified from expread.y by the Department of Computer Science at the

   State University of New York at Buffalo.

   This file is part of GDB.

   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 2 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, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#if !defined (PARSER_DEFS_H)

#define PARSER_DEFS_H 1

struct std_regs

  {

    char *name;

    int regnum;

  };

extern struct std_regs *std_regs;

extern unsigned num_std_regs;

extern struct expression *expout;

extern int expout_size;

extern int expout_ptr;

/* If this is nonzero, this block is used as the lexical context

   for symbol names.  */

extern struct block *expression_context_block;

/* The innermost context required by the stack and register variables

   we've encountered so far. */

extern struct block *innermost_block;

/* The block in which the most recently discovered symbol was found.

   FIXME: Should be declared along with lookup_symbol in symtab.h; is not

   related specifically to parsing.  */

extern struct block *block_found;

/* Number of arguments seen so far in innermost function call.  */

extern int arglist_len;

/* A string token, either a char-string or bit-string.  Char-strings are

   used, for example, for the names of symbols. */

struct stoken

  {

    /* Pointer to first byte of char-string or first bit of bit-string */

    char *ptr;

    /* Length of string in bytes for char-string or bits for bit-string */

    int length;

  };

struct ttype

  {

    struct stoken stoken;

    struct type *type;

  };

struct symtoken

  {

    struct stoken stoken;

    struct symbol *sym;

    int is_a_field_of_this;

  };

/* For parsing of complicated types.

   An array should be preceded in the list by the size of the array.  */

enum type_pieces

  {

    tp_end = -1, tp_pointer, tp_reference, tp_array, tp_function

  };

/* The stack can contain either an enum type_pieces or an int.  */

union type_stack_elt

  {

    enum type_pieces piece;

    int int_val;

  };

extern union type_stack_elt *type_stack;

extern int type_stack_depth, type_stack_size;

extern void write_exp_elt (union exp_element);

extern void write_exp_elt_opcode (enum exp_opcode);

extern void write_exp_elt_sym (struct symbol *);

extern void write_exp_elt_longcst (LONGEST);

extern void write_exp_elt_dblcst (DOUBLEST);

extern void write_exp_elt_type (struct type *);

extern void write_exp_elt_intern (struct internalvar *);

extern void write_exp_string (struct stoken);

extern void write_exp_bitstring (struct stoken);

extern void write_exp_elt_block (struct block *);

extern void write_exp_msymbol (struct minimal_symbol *,

                               struct type *, struct type *);

extern void write_dollar_variable (struct stoken str);

extern struct symbol *parse_nested_classes_for_hpacc (char *, int, char **,

                                                      int *, char **);

extern char *find_template_name_end (char *);

extern void start_arglist (void);

extern int end_arglist (void);

extern char *copy_name (struct stoken);

extern void push_type (enum type_pieces);

extern void push_type_int (int);

extern enum type_pieces pop_type (void);

extern int pop_type_int (void);

extern int length_of_subexp (struct expression *, int);

extern struct type *follow_types (struct type *);

/* During parsing of a C expression, the pointer to the next character

   is in this variable.  */

extern char *lexptr;

/* Tokens that refer to names do so with explicit pointer and length,

   so they can share the storage that lexptr is parsing.

   When it is necessary to pass a name to a function that expects

   a null-terminated string, the substring is copied out

   into a block of storage that namecopy points to.

   namecopy is allocated once, guaranteed big enough, for each parsing.  */

extern char *namecopy;

/* Current depth in parentheses within the expression.  */

extern int paren_depth;

/* Nonzero means stop parsing on first comma (if not within parentheses).  */

extern int comma_terminates;

/* These codes indicate operator precedences for expression printing,

   least tightly binding first.  */

/* Adding 1 to a precedence value is done for binary operators,

   on the operand which is more tightly bound, so that operators

   of equal precedence within that operand will get parentheses.  */

/* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;

   they are used as the "surrounding precedence" to force

   various kinds of things to be parenthesized.  */

enum precedence

  {

    PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,

    PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,

    PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,

    PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION

  };

/* Table mapping opcodes into strings for printing operators

   and precedences of the operators.  */

struct op_print

  {

    char *string;

    enum exp_opcode opcode;

    /* Precedence of operator.  These values are used only by comparisons.  */

    enum precedence precedence;

    /* For a binary operator:  1 iff right associate.

       For a unary operator:  1 iff postfix. */

    int right_assoc;

  };

/* The generic method for targets to specify how their registers are

   named.  The mapping can be derived from three sources:

   REGISTER_NAME; std_regs; or a target specific alias hook. */

extern int target_map_name_to_register (char *, int);

#endif /* PARSER_DEFS_H */