Commit | Line | Data |
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c906108c | 1 | /* Parser definitions for GDB. |
96cb11df | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
0fb0cc75 | 4 | 1998, 1999, 2000, 2002, 2007, 2008, 2009 Free Software Foundation, Inc. |
96cb11df | 5 | |
c906108c SS |
6 | Modified from expread.y by the Department of Computer Science at the |
7 | State University of New York at Buffalo. | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
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 | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
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. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #if !defined (PARSER_DEFS_H) | |
25 | #define PARSER_DEFS_H 1 | |
26 | ||
d16aafd8 AC |
27 | #include "doublest.h" |
28 | ||
fe898f56 DC |
29 | struct block; |
30 | ||
c906108c SS |
31 | extern struct expression *expout; |
32 | extern int expout_size; | |
33 | extern int expout_ptr; | |
34 | ||
3e79cecf UW |
35 | #define parse_gdbarch (expout->gdbarch) |
36 | #define parse_language (expout->language_defn) | |
37 | ||
c906108c SS |
38 | /* If this is nonzero, this block is used as the lexical context |
39 | for symbol names. */ | |
40 | ||
41 | extern struct block *expression_context_block; | |
42 | ||
84f0252a JB |
43 | /* If expression_context_block is non-zero, then this is the PC within |
44 | the block that we want to evaluate expressions at. When debugging | |
45 | C or C++ code, we use this to find the exact line we're at, and | |
46 | then look up the macro definitions active at that point. */ | |
f7321c06 | 47 | extern CORE_ADDR expression_context_pc; |
84f0252a | 48 | |
c906108c SS |
49 | /* The innermost context required by the stack and register variables |
50 | we've encountered so far. */ | |
51 | extern struct block *innermost_block; | |
52 | ||
53 | /* The block in which the most recently discovered symbol was found. | |
54 | FIXME: Should be declared along with lookup_symbol in symtab.h; is not | |
55 | related specifically to parsing. */ | |
56 | extern struct block *block_found; | |
57 | ||
58 | /* Number of arguments seen so far in innermost function call. */ | |
59 | extern int arglist_len; | |
60 | ||
61 | /* A string token, either a char-string or bit-string. Char-strings are | |
62 | used, for example, for the names of symbols. */ | |
63 | ||
64 | struct stoken | |
65 | { | |
66 | /* Pointer to first byte of char-string or first bit of bit-string */ | |
67 | char *ptr; | |
68 | /* Length of string in bytes for char-string or bits for bit-string */ | |
69 | int length; | |
70 | }; | |
71 | ||
72 | struct ttype | |
73 | { | |
74 | struct stoken stoken; | |
75 | struct type *type; | |
76 | }; | |
77 | ||
78 | struct symtoken | |
79 | { | |
80 | struct stoken stoken; | |
81 | struct symbol *sym; | |
82 | int is_a_field_of_this; | |
83 | }; | |
84 | ||
379b85df AF |
85 | struct objc_class_str |
86 | { | |
87 | struct stoken stoken; | |
88 | struct type *type; | |
89 | int class; | |
90 | }; | |
91 | ||
92 | ||
c906108c SS |
93 | /* For parsing of complicated types. |
94 | An array should be preceded in the list by the size of the array. */ | |
95 | enum type_pieces | |
c5aa993b | 96 | { |
2e2394a0 MS |
97 | tp_end = -1, |
98 | tp_pointer, | |
99 | tp_reference, | |
100 | tp_array, | |
101 | tp_function, | |
102 | tp_const, | |
47663de5 MS |
103 | tp_volatile, |
104 | tp_space_identifier | |
c5aa993b | 105 | }; |
c906108c | 106 | /* The stack can contain either an enum type_pieces or an int. */ |
c5aa993b JM |
107 | union type_stack_elt |
108 | { | |
109 | enum type_pieces piece; | |
110 | int int_val; | |
111 | }; | |
c906108c SS |
112 | extern union type_stack_elt *type_stack; |
113 | extern int type_stack_depth, type_stack_size; | |
114 | ||
a14ed312 | 115 | extern void write_exp_elt (union exp_element); |
c906108c | 116 | |
a14ed312 | 117 | extern void write_exp_elt_opcode (enum exp_opcode); |
c906108c | 118 | |
a14ed312 | 119 | extern void write_exp_elt_sym (struct symbol *); |
c906108c | 120 | |
a14ed312 | 121 | extern void write_exp_elt_longcst (LONGEST); |
c906108c | 122 | |
a14ed312 | 123 | extern void write_exp_elt_dblcst (DOUBLEST); |
c906108c | 124 | |
27bc4d80 TJB |
125 | extern void write_exp_elt_decfloatcst (gdb_byte *); |
126 | ||
a14ed312 | 127 | extern void write_exp_elt_type (struct type *); |
c906108c | 128 | |
a14ed312 | 129 | extern void write_exp_elt_intern (struct internalvar *); |
c906108c | 130 | |
a14ed312 | 131 | extern void write_exp_string (struct stoken); |
c906108c | 132 | |
a14ed312 | 133 | extern void write_exp_bitstring (struct stoken); |
c906108c | 134 | |
a14ed312 | 135 | extern void write_exp_elt_block (struct block *); |
c906108c | 136 | |
9e35dae4 DJ |
137 | extern void write_exp_elt_objfile (struct objfile *objfile); |
138 | ||
c841afd5 | 139 | extern void write_exp_msymbol (struct minimal_symbol *); |
c906108c | 140 | |
a14ed312 | 141 | extern void write_dollar_variable (struct stoken str); |
c906108c | 142 | |
65d12d83 TT |
143 | extern void mark_struct_expression (void); |
144 | ||
a14ed312 | 145 | extern char *find_template_name_end (char *); |
c906108c | 146 | |
a14ed312 | 147 | extern void start_arglist (void); |
c906108c | 148 | |
a14ed312 | 149 | extern int end_arglist (void); |
c906108c | 150 | |
a14ed312 | 151 | extern char *copy_name (struct stoken); |
c906108c | 152 | |
a14ed312 | 153 | extern void push_type (enum type_pieces); |
c906108c | 154 | |
a14ed312 | 155 | extern void push_type_int (int); |
c906108c | 156 | |
47663de5 MS |
157 | extern void push_type_address_space (char *); |
158 | ||
a14ed312 | 159 | extern enum type_pieces pop_type (void); |
c906108c | 160 | |
a14ed312 | 161 | extern int pop_type_int (void); |
c906108c | 162 | |
a14ed312 | 163 | extern int length_of_subexp (struct expression *, int); |
c906108c | 164 | |
5f9769d1 PH |
165 | extern int dump_subexp (struct expression *, struct ui_file *, int); |
166 | ||
167 | extern int dump_subexp_body_standard (struct expression *, | |
168 | struct ui_file *, int); | |
169 | ||
24daaebc PH |
170 | extern void operator_length (struct expression *, int, int *, int *); |
171 | ||
5f9769d1 PH |
172 | extern void operator_length_standard (struct expression *, int, int *, int *); |
173 | ||
174 | extern char *op_name_standard (enum exp_opcode); | |
175 | ||
a14ed312 | 176 | extern struct type *follow_types (struct type *); |
c906108c | 177 | |
e85c3284 PH |
178 | extern void null_post_parser (struct expression **, int); |
179 | ||
c906108c SS |
180 | /* During parsing of a C expression, the pointer to the next character |
181 | is in this variable. */ | |
182 | ||
183 | extern char *lexptr; | |
184 | ||
665132f9 MS |
185 | /* After a token has been recognized, this variable points to it. |
186 | Currently used only for error reporting. */ | |
187 | extern char *prev_lexptr; | |
188 | ||
c906108c SS |
189 | /* Tokens that refer to names do so with explicit pointer and length, |
190 | so they can share the storage that lexptr is parsing. | |
191 | ||
192 | When it is necessary to pass a name to a function that expects | |
193 | a null-terminated string, the substring is copied out | |
194 | into a block of storage that namecopy points to. | |
195 | ||
196 | namecopy is allocated once, guaranteed big enough, for each parsing. */ | |
197 | ||
198 | extern char *namecopy; | |
199 | ||
200 | /* Current depth in parentheses within the expression. */ | |
201 | ||
202 | extern int paren_depth; | |
203 | ||
204 | /* Nonzero means stop parsing on first comma (if not within parentheses). */ | |
205 | ||
206 | extern int comma_terminates; | |
207 | \f | |
208 | /* These codes indicate operator precedences for expression printing, | |
209 | least tightly binding first. */ | |
210 | /* Adding 1 to a precedence value is done for binary operators, | |
211 | on the operand which is more tightly bound, so that operators | |
212 | of equal precedence within that operand will get parentheses. */ | |
213 | /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator; | |
214 | they are used as the "surrounding precedence" to force | |
215 | various kinds of things to be parenthesized. */ | |
216 | enum precedence | |
c5aa993b JM |
217 | { |
218 | PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR, | |
219 | PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR, | |
220 | PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT, | |
221 | PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION | |
222 | }; | |
c906108c SS |
223 | |
224 | /* Table mapping opcodes into strings for printing operators | |
225 | and precedences of the operators. */ | |
226 | ||
227 | struct op_print | |
c5aa993b JM |
228 | { |
229 | char *string; | |
230 | enum exp_opcode opcode; | |
231 | /* Precedence of operator. These values are used only by comparisons. */ | |
232 | enum precedence precedence; | |
233 | ||
234 | /* For a binary operator: 1 iff right associate. | |
235 | For a unary operator: 1 iff postfix. */ | |
236 | int right_assoc; | |
237 | }; | |
c906108c | 238 | |
5f9769d1 PH |
239 | /* Information needed to print, prefixify, and evaluate expressions for |
240 | a given language. */ | |
241 | ||
242 | struct exp_descriptor | |
243 | { | |
244 | /* Print subexpression. */ | |
245 | void (*print_subexp) (struct expression *, int *, struct ui_file *, | |
246 | enum precedence); | |
247 | ||
248 | /* Returns number of exp_elements needed to represent an operator and | |
249 | the number of subexpressions it takes. */ | |
250 | void (*operator_length) (struct expression*, int, int*, int *); | |
251 | ||
252 | /* Name of this operator for dumping purposes. */ | |
253 | char *(*op_name) (enum exp_opcode); | |
254 | ||
255 | /* Dump the rest of this (prefix) expression after the operator | |
256 | itself has been printed. See dump_subexp_body_standard in | |
257 | (expprint.c). */ | |
258 | int (*dump_subexp_body) (struct expression *, struct ui_file *, int); | |
259 | ||
260 | /* Evaluate an expression. */ | |
261 | struct value *(*evaluate_exp) (struct type *, struct expression *, | |
262 | int *, enum noside); | |
263 | }; | |
264 | ||
265 | ||
266 | /* Default descriptor containing standard definitions of all | |
267 | elements. */ | |
268 | extern const struct exp_descriptor exp_descriptor_standard; | |
269 | ||
270 | /* Functions used by language-specific extended operators to (recursively) | |
271 | print/dump subexpressions. */ | |
272 | ||
273 | extern void print_subexp (struct expression *, int *, struct ui_file *, | |
274 | enum precedence); | |
275 | ||
276 | extern void print_subexp_standard (struct expression *, int *, | |
277 | struct ui_file *, enum precedence); | |
278 | ||
f461f5cf PM |
279 | /* Function used to avoid direct calls to fprintf |
280 | in the code generated by the bison parser. */ | |
281 | ||
282 | extern void parser_fprintf (FILE *, const char *, ...) ATTR_FORMAT (printf, 2 ,3); | |
283 | ||
c5aa993b | 284 | #endif /* PARSER_DEFS_H */ |