gdb/parser-defs.h

   1 /* Parser definitions for GDB.
   2
   3    Copyright 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
   4    1997, 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
   5
   6    Modified from expread.y by the Department of Computer Science at the
   7    State University of New York at Buffalo.
   8
   9    This file is part of GDB.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 2 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 59 Temple Place - Suite 330,
  24    Boston, MA 02111-1307, USA.  */
  25
  26 #if !defined (PARSER_DEFS_H)
  27 #define PARSER_DEFS_H 1
  28
  29 #include "doublest.h"
  30
  31 extern struct expression *expout;
  32 extern int expout_size;
  33 extern int expout_ptr;
  34
  35 /* If this is nonzero, this block is used as the lexical context
  36    for symbol names.  */
  37
  38 extern struct block *expression_context_block;
  39
  40 /* If expression_context_block is non-zero, then this is the PC within
  41    the block that we want to evaluate expressions at.  When debugging
  42    C or C++ code, we use this to find the exact line we're at, and
  43    then look up the macro definitions active at that point.  */
  44 extern CORE_ADDR expression_context_pc;
  45
  46 /* The innermost context required by the stack and register variables
  47    we've encountered so far. */
  48 extern struct block *innermost_block;
  49
  50 /* The block in which the most recently discovered symbol was found.
  51    FIXME: Should be declared along with lookup_symbol in symtab.h; is not
  52    related specifically to parsing.  */
  53 extern struct block *block_found;
  54
  55 /* Number of arguments seen so far in innermost function call.  */
  56 extern int arglist_len;
  57
  58 /* A string token, either a char-string or bit-string.  Char-strings are
  59    used, for example, for the names of symbols. */
  60
  61 struct stoken
  62   {
  63     /* Pointer to first byte of char-string or first bit of bit-string */
  64     char *ptr;
  65     /* Length of string in bytes for char-string or bits for bit-string */
  66     int length;
  67   };
  68
  69 struct ttype
  70   {
  71     struct stoken stoken;
  72     struct type *type;
  73   };
  74
  75 struct symtoken
  76   {
  77     struct stoken stoken;
  78     struct symbol *sym;
  79     int is_a_field_of_this;
  80   };
  81
  82 struct objc_class_str
  83   {
  84     struct stoken stoken;
  85     struct type *type;
  86     int class;
  87   };
  88
  89
  90 /* For parsing of complicated types.
  91    An array should be preceded in the list by the size of the array.  */
  92 enum type_pieces
  93   {
  94     tp_end = -1,
  95     tp_pointer,
  96     tp_reference,
  97     tp_array,
  98     tp_function,
  99     tp_const,
 100     tp_volatile,
 101     tp_space_identifier
 102   };
 103 /* The stack can contain either an enum type_pieces or an int.  */
 104 union type_stack_elt
 105   {
 106     enum type_pieces piece;
 107     int int_val;
 108   };
 109 extern union type_stack_elt *type_stack;
 110 extern int type_stack_depth, type_stack_size;
 111
 112 extern void write_exp_elt (union exp_element);
 113
 114 extern void write_exp_elt_opcode (enum exp_opcode);
 115
 116 extern void write_exp_elt_sym (struct symbol *);
 117
 118 extern void write_exp_elt_longcst (LONGEST);
 119
 120 extern void write_exp_elt_dblcst (DOUBLEST);
 121
 122 extern void write_exp_elt_type (struct type *);
 123
 124 extern void write_exp_elt_intern (struct internalvar *);
 125
 126 extern void write_exp_string (struct stoken);
 127
 128 extern void write_exp_bitstring (struct stoken);
 129
 130 extern void write_exp_elt_block (struct block *);
 131
 132 extern void write_exp_msymbol (struct minimal_symbol *,
 133                                struct type *, struct type *);
 134
 135 extern void write_dollar_variable (struct stoken str);
 136
 137 extern struct symbol *parse_nested_classes_for_hpacc (char *, int, char **,
 138                                                       int *, char **);
 139
 140 extern char *find_template_name_end (char *);
 141
 142 extern void start_arglist (void);
 143
 144 extern int end_arglist (void);
 145
 146 extern char *copy_name (struct stoken);
 147
 148 extern void push_type (enum type_pieces);
 149
 150 extern void push_type_int (int);
 151
 152 extern void push_type_address_space (char *);
 153
 154 extern enum type_pieces pop_type (void);
 155
 156 extern int pop_type_int (void);
 157
 158 extern int length_of_subexp (struct expression *, int);
 159
 160 extern struct type *follow_types (struct type *);
 161
 162 /* During parsing of a C expression, the pointer to the next character
 163    is in this variable.  */
 164
 165 extern char *lexptr;
 166
 167 /* After a token has been recognized, this variable points to it.
 168    Currently used only for error reporting.  */
 169 extern char *prev_lexptr;
 170
 171 /* Tokens that refer to names do so with explicit pointer and length,
 172    so they can share the storage that lexptr is parsing.
 173
 174    When it is necessary to pass a name to a function that expects
 175    a null-terminated string, the substring is copied out
 176    into a block of storage that namecopy points to.
 177
 178    namecopy is allocated once, guaranteed big enough, for each parsing.  */
 179
 180 extern char *namecopy;
 181
 182 /* Current depth in parentheses within the expression.  */
 183
 184 extern int paren_depth;
 185
 186 /* Nonzero means stop parsing on first comma (if not within parentheses).  */
 187
 188 extern int comma_terminates;
 189 \f
 190 /* These codes indicate operator precedences for expression printing,
 191    least tightly binding first.  */
 192 /* Adding 1 to a precedence value is done for binary operators,
 193    on the operand which is more tightly bound, so that operators
 194    of equal precedence within that operand will get parentheses.  */
 195 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
 196    they are used as the "surrounding precedence" to force
 197    various kinds of things to be parenthesized.  */
 198 enum precedence
 199   {
 200     PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
 201     PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
 202     PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
 203     PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION
 204   };
 205
 206 /* Table mapping opcodes into strings for printing operators
 207    and precedences of the operators.  */
 208
 209 struct op_print
 210   {
 211     char *string;
 212     enum exp_opcode opcode;
 213     /* Precedence of operator.  These values are used only by comparisons.  */
 214     enum precedence precedence;
 215
 216     /* For a binary operator:  1 iff right associate.
 217        For a unary operator:  1 iff postfix. */
 218     int right_assoc;
 219   };
 220
 221 /* Function used to avoid direct calls to fprintf
 222    in the code generated by the bison parser.  */
 223
 224 extern void parser_fprintf (FILE *, const char *, ...) ATTR_FORMAT (printf, 2 ,3);
 225
 226 #endif /* PARSER_DEFS_H */