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c906108c | 1 | /* Source-language-related definitions for GDB. |
1bac305b | 2 | |
b811d2c2 | 3 | Copyright (C) 1991-2020 Free Software Foundation, Inc. |
1bac305b | 4 | |
c906108c SS |
5 | Contributed by the Department of Computer Science at the State University |
6 | of New York at Buffalo. | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 13 | (at your option) any later version. |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b | 20 | You should have received a copy of the GNU General Public License |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | #if !defined (LANGUAGE_H) | |
24 | #define LANGUAGE_H 1 | |
25 | ||
671afef6 | 26 | #include "symtab.h" |
268a13a5 | 27 | #include "gdbsupport/function-view.h" |
e9d9f57e | 28 | #include "expression.h" |
671afef6 | 29 | |
1777feb0 | 30 | /* Forward decls for prototypes. */ |
c906108c SS |
31 | struct value; |
32 | struct objfile; | |
52f729a7 | 33 | struct frame_info; |
da3331ec | 34 | struct ui_file; |
79a45b7d | 35 | struct value_print_options; |
79d43c61 | 36 | struct type_print_options; |
a53b64ea | 37 | struct lang_varobj_ops; |
410a0ff2 | 38 | struct parser_state; |
9cdfd9a2 | 39 | class compile_instance; |
a207cff2 | 40 | struct completion_match_for_lcd; |
699bd4cf | 41 | class innermost_block_tracker; |
62dfaa9c | 42 | |
1777feb0 | 43 | #define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims. */ |
c906108c SS |
44 | |
45 | /* range_mode == | |
46 | range_mode_auto: range_check set automatically to default of language. | |
47 | range_mode_manual: range_check set manually by user. */ | |
48 | ||
c5aa993b JM |
49 | extern enum range_mode |
50 | { | |
51 | range_mode_auto, range_mode_manual | |
52 | } | |
53 | range_mode; | |
c906108c SS |
54 | |
55 | /* range_check == | |
56 | range_check_on: Ranges are checked in GDB expressions, producing errors. | |
57 | range_check_warn: Ranges are checked, producing warnings. | |
58 | range_check_off: Ranges are not checked in GDB expressions. */ | |
59 | ||
60 | extern enum range_check | |
c5aa993b JM |
61 | { |
62 | range_check_off, range_check_warn, range_check_on | |
63 | } | |
64 | range_check; | |
c906108c | 65 | |
63872f9d | 66 | /* case_mode == |
1777feb0 | 67 | case_mode_auto: case_sensitivity set upon selection of scope. |
63872f9d JG |
68 | case_mode_manual: case_sensitivity set only by user. */ |
69 | ||
70 | extern enum case_mode | |
71 | { | |
72 | case_mode_auto, case_mode_manual | |
73 | } | |
74 | case_mode; | |
75 | ||
7ca2d3a3 | 76 | /* array_ordering == |
1777feb0 MS |
77 | array_row_major: Arrays are in row major order. |
78 | array_column_major: Arrays are in column major order. */ | |
7ca2d3a3 DL |
79 | |
80 | extern enum array_ordering | |
81 | { | |
82 | array_row_major, array_column_major | |
83 | } | |
84 | array_ordering; | |
85 | ||
86 | ||
63872f9d | 87 | /* case_sensitivity == |
1777feb0 MS |
88 | case_sensitive_on: Case sensitivity in name matching is used. |
89 | case_sensitive_off: Case sensitivity in name matching is not used. */ | |
63872f9d JG |
90 | |
91 | extern enum case_sensitivity | |
92 | { | |
93 | case_sensitive_on, case_sensitive_off | |
94 | } | |
95 | case_sensitivity; | |
9a044a89 TT |
96 | |
97 | ||
98 | /* macro_expansion == | |
1777feb0 MS |
99 | macro_expansion_no: No macro expansion is available. |
100 | macro_expansion_c: C-like macro expansion is available. */ | |
9a044a89 TT |
101 | |
102 | enum macro_expansion | |
103 | { | |
104 | macro_expansion_no, macro_expansion_c | |
105 | }; | |
106 | ||
c906108c | 107 | \f |
f290d38e AC |
108 | /* Per architecture (OS/ABI) language information. */ |
109 | ||
110 | struct language_arch_info | |
111 | { | |
5a44ea29 | 112 | /* Its primitive types. This is a vector ended by a NULL pointer. |
f290d38e AC |
113 | These types can be specified by name in parsing types in |
114 | expressions, regardless of whether the program being debugged | |
115 | actually defines such a type. */ | |
5a44ea29 | 116 | struct type **primitive_type_vector; |
1994afbf DE |
117 | |
118 | /* Symbol wrappers around primitive_type_vector, so that the symbol lookup | |
119 | machinery can return them. */ | |
120 | struct symbol **primitive_type_symbols; | |
121 | ||
1777feb0 | 122 | /* Type of elements of strings. */ |
f290d38e | 123 | struct type *string_char_type; |
fbb06eb1 UW |
124 | |
125 | /* Symbol name of type to use as boolean type, if defined. */ | |
126 | const char *bool_type_symbol; | |
127 | /* Otherwise, this is the default boolean builtin type. */ | |
128 | struct type *bool_type_default; | |
f290d38e AC |
129 | }; |
130 | ||
9d084466 TBA |
131 | /* In a language (particularly C++) a function argument of an aggregate |
132 | type (i.e. class/struct/union) may be implicitly passed by reference | |
133 | even though it is declared a call-by-value argument in the source. | |
134 | The struct below puts together necessary information for GDB to be | |
135 | able to detect and carry out pass-by-reference semantics for a | |
136 | particular type. This type is referred as T in the inlined comments | |
137 | below. | |
138 | ||
139 | The default values of the fields are chosen to give correct semantics | |
140 | for primitive types and for simple aggregate types, such as | |
141 | ||
142 | class T { | |
143 | int x; | |
144 | }; */ | |
145 | ||
146 | struct language_pass_by_ref_info | |
147 | { | |
148 | /* True if an argument of type T can be passed to a function by value | |
149 | (i.e. not through an implicit reference). False, otherwise. */ | |
150 | bool trivially_copyable = true; | |
151 | ||
152 | /* True if a copy of a value of type T can be initialized by | |
153 | memcpy'ing the value bit-by-bit. False, otherwise. | |
154 | E.g. If T has a user-defined copy ctor, this should be false. */ | |
155 | bool trivially_copy_constructible = true; | |
156 | ||
157 | /* True if a value of type T can be destructed simply by reclaiming | |
158 | the memory area occupied by the value. False, otherwise. | |
159 | E.g. If T has a user-defined destructor, this should be false. */ | |
160 | bool trivially_destructible = true; | |
161 | ||
162 | /* True if it is allowed to create a copy of a value of type T. | |
163 | False, otherwise. | |
164 | E.g. If T has a deleted copy ctor, this should be false. */ | |
165 | bool copy_constructible = true; | |
166 | ||
167 | /* True if a value of type T can be destructed. False, otherwise. | |
168 | E.g. If T has a deleted destructor, this should be false. */ | |
169 | bool destructible = true; | |
170 | }; | |
171 | ||
53fc67f8 AB |
172 | /* Splitting strings into words. */ |
173 | extern const char *default_word_break_characters (void); | |
174 | ||
0874fd07 | 175 | /* Structure tying together assorted information about a language. |
c906108c | 176 | |
0874fd07 AB |
177 | As we move over from the old structure based languages to a class |
178 | hierarchy of languages this structure will continue to contain a | |
179 | mixture of both data and function pointers. | |
180 | ||
181 | Once the class hierarchy of languages in place the first task is to | |
182 | remove the function pointers from this structure and convert them into | |
183 | member functions on the different language classes. | |
184 | ||
185 | The current plan it to keep the constant data that describes a language | |
186 | in this structure, and have each language pass in an instance of this | |
187 | structure at construction time. */ | |
188 | ||
189 | struct language_data | |
c5aa993b | 190 | { |
1777feb0 | 191 | /* Name of the language. */ |
c906108c | 192 | |
27cd387b | 193 | const char *la_name; |
c906108c | 194 | |
6abde28f YQ |
195 | /* Natural or official name of the language. */ |
196 | ||
197 | const char *la_natural_name; | |
198 | ||
1777feb0 | 199 | /* its symtab language-enum (defs.h). */ |
c906108c | 200 | |
c5aa993b | 201 | enum language la_language; |
c906108c | 202 | |
1777feb0 | 203 | /* Default range checking. */ |
c906108c | 204 | |
c5aa993b | 205 | enum range_check la_range_check; |
c906108c | 206 | |
1777feb0 | 207 | /* Default case sensitivity. */ |
63872f9d JG |
208 | enum case_sensitivity la_case_sensitivity; |
209 | ||
1777feb0 | 210 | /* Multi-dimensional array ordering. */ |
7ca2d3a3 DL |
211 | enum array_ordering la_array_ordering; |
212 | ||
9a044a89 TT |
213 | /* Style of macro expansion, if any, supported by this language. */ |
214 | enum macro_expansion la_macro_expansion; | |
215 | ||
56618e20 TT |
216 | /* A NULL-terminated array of file extensions for this language. |
217 | The extension must include the ".", like ".c". If this | |
218 | language doesn't need to provide any filename extensions, this | |
219 | may be NULL. */ | |
220 | ||
221 | const char *const *la_filename_extensions; | |
222 | ||
5f9769d1 | 223 | /* Definitions related to expression printing, prefixifying, and |
1777feb0 | 224 | dumping. */ |
5f9769d1 PH |
225 | |
226 | const struct exp_descriptor *la_exp_desc; | |
227 | ||
5f9a71c3 DC |
228 | /* Now come some hooks for lookup_symbol. */ |
229 | ||
2b2d9e11 VP |
230 | /* If this is non-NULL, specifies the name that of the implicit |
231 | local variable that refers to the current object instance. */ | |
5f9a71c3 | 232 | |
a121b7c1 | 233 | const char *la_name_of_this; |
5f9a71c3 | 234 | |
59cc4834 JB |
235 | /* True if the symbols names should be stored in GDB's data structures |
236 | for minimal/partial/full symbols using their linkage (aka mangled) | |
237 | form; false if the symbol names should be demangled first. | |
238 | ||
239 | Most languages implement symbol lookup by comparing the demangled | |
240 | names, in which case it is advantageous to store that information | |
241 | already demangled, and so would set this field to false. | |
242 | ||
243 | On the other hand, some languages have opted for doing symbol | |
244 | lookups by comparing mangled names instead, for reasons usually | |
245 | specific to the language. Those languages should set this field | |
246 | to true. | |
247 | ||
248 | And finally, other languages such as C or Asm do not have | |
249 | the concept of mangled vs demangled name, so those languages | |
250 | should set this field to true as well, to prevent any accidental | |
251 | demangling through an unrelated language's demangler. */ | |
252 | ||
253 | const bool la_store_sym_names_in_linkage_form_p; | |
254 | ||
1777feb0 | 255 | /* Table for printing expressions. */ |
c906108c | 256 | |
c5aa993b | 257 | const struct op_print *la_op_print_tab; |
c906108c | 258 | |
c5aa993b | 259 | /* Zero if the language has first-class arrays. True if there are no |
1777feb0 | 260 | array values, and array objects decay to pointers, as in C. */ |
c906108c | 261 | |
c5aa993b | 262 | char c_style_arrays; |
c906108c | 263 | |
1777feb0 | 264 | /* Index to use for extracting the first element of a string. */ |
c5aa993b | 265 | char string_lower_bound; |
c906108c | 266 | |
a53b64ea YQ |
267 | /* Various operations on varobj. */ |
268 | const struct lang_varobj_ops *la_varobj_ops; | |
269 | ||
721b08c6 AB |
270 | /* This string is used by the 'set print max-depth' setting. When GDB |
271 | replaces a struct or union (during value printing) that is "too | |
272 | deep" this string is displayed instead. */ | |
273 | const char *la_struct_too_deep_ellipsis; | |
274 | ||
c5aa993b | 275 | }; |
c906108c | 276 | |
0874fd07 AB |
277 | /* Base class from which all other language classes derive. */ |
278 | ||
279 | struct language_defn : language_data | |
280 | { | |
281 | language_defn (enum language lang, const language_data &init_data) | |
282 | : language_data (init_data) | |
283 | { | |
284 | /* We should only ever create one instance of each language. */ | |
285 | gdb_assert (languages[lang] == nullptr); | |
286 | languages[lang] = this; | |
287 | } | |
288 | ||
5bd40f2a AB |
289 | /* Print the index of an element of an array. This default |
290 | implementation prints using C99 syntax. */ | |
291 | ||
292 | virtual void print_array_index (struct type *index_type, | |
293 | LONGEST index_value, | |
294 | struct ui_file *stream, | |
295 | const value_print_options *options) const; | |
296 | ||
15e5fd35 AB |
297 | /* Given a symbol VAR, the corresponding block VAR_BLOCK (if any) and a |
298 | stack frame id FRAME, read the value of the variable and return (pointer | |
299 | to a) struct value containing the value. | |
300 | ||
301 | VAR_BLOCK is needed if there's a possibility for VAR to be outside | |
302 | FRAME. This is what happens if FRAME correspond to a nested function | |
303 | and VAR is defined in the outer function. If callers know that VAR is | |
304 | located in FRAME or is global/static, NULL can be passed as VAR_BLOCK. | |
305 | ||
306 | Throw an error if the variable cannot be found. */ | |
307 | ||
308 | virtual struct value *read_var_value (struct symbol *var, | |
309 | const struct block *var_block, | |
310 | struct frame_info *frame) const; | |
311 | ||
48448202 AB |
312 | /* Return information about whether TYPE should be passed |
313 | (and returned) by reference at the language level. The default | |
314 | implementation returns a LANGUAGE_PASS_BY_REF_INFO initialised in its | |
315 | default state. */ | |
316 | ||
317 | virtual struct language_pass_by_ref_info pass_by_reference_info | |
318 | (struct type *type) const | |
319 | { | |
320 | return {}; | |
321 | } | |
322 | ||
1fb314aa AB |
323 | /* The per-architecture (OS/ABI) language information. */ |
324 | ||
325 | virtual void language_arch_info (struct gdbarch *, | |
326 | struct language_arch_info *) const = 0; | |
327 | ||
54f4ca46 AB |
328 | /* Find the definition of the type with the given name. */ |
329 | ||
330 | virtual struct type *lookup_transparent_type (const char *name) const | |
331 | { | |
332 | return basic_lookup_transparent_type (name); | |
333 | } | |
334 | ||
4009ee92 AB |
335 | /* Find all symbols in the current program space matching NAME in |
336 | DOMAIN, according to this language's rules. | |
337 | ||
338 | The search is done in BLOCK only. | |
339 | The caller is responsible for iterating up through superblocks | |
340 | if desired. | |
341 | ||
342 | For each one, call CALLBACK with the symbol. If CALLBACK | |
343 | returns false, the iteration ends at that point. | |
344 | ||
345 | This field may not be NULL. If the language does not need any | |
346 | special processing here, 'iterate_over_symbols' should be | |
347 | used as the definition. */ | |
348 | virtual bool iterate_over_symbols | |
349 | (const struct block *block, const lookup_name_info &name, | |
350 | domain_enum domain, | |
351 | gdb::function_view<symbol_found_callback_ftype> callback) const | |
352 | { | |
353 | return ::iterate_over_symbols (block, name, domain, callback); | |
354 | } | |
355 | ||
c9debfb9 AB |
356 | /* Return a pointer to the function that should be used to match a |
357 | symbol name against LOOKUP_NAME, according to this language's | |
358 | rules. The matching algorithm depends on LOOKUP_NAME. For | |
359 | example, on Ada, the matching algorithm depends on the symbol | |
360 | name (wild/full/verbatim matching), and on whether we're doing | |
361 | a normal lookup or a completion match lookup. | |
362 | ||
363 | As Ada wants to capture symbol matching for all languages in some | |
364 | cases, then this method is a non-overridable interface. Languages | |
365 | should override GET_SYMBOL_NAME_MATCHER_INNER if they need to. */ | |
366 | ||
367 | symbol_name_matcher_ftype *get_symbol_name_matcher | |
368 | (const lookup_name_info &lookup_name) const; | |
369 | ||
8e25bafe AB |
370 | /* If this language allows compilation from the gdb command line, then |
371 | this method will return an instance of struct gcc_context appropriate | |
372 | to the language. If compilation for this language is generally | |
373 | supported, but something goes wrong then an exception is thrown. The | |
374 | returned compiler instance is owned by its caller and must be | |
375 | deallocated by the caller. If compilation is not supported for this | |
376 | language then this method returns NULL. */ | |
377 | ||
378 | virtual compile_instance *get_compile_instance () const | |
379 | { | |
380 | return nullptr; | |
381 | } | |
382 | ||
9a49ad8c AB |
383 | /* This method must be overridden if 'get_compile_instance' is |
384 | overridden. | |
385 | ||
386 | This takes the user-supplied text and returns a new bit of code | |
387 | to compile. | |
388 | ||
389 | INST is the compiler instance being used. | |
390 | INPUT is the user's input text. | |
391 | GDBARCH is the architecture to use. | |
392 | EXPR_BLOCK is the block in which the expression is being | |
393 | parsed. | |
394 | EXPR_PC is the PC at which the expression is being parsed. */ | |
395 | ||
396 | virtual std::string compute_program (compile_instance *inst, | |
397 | const char *input, | |
398 | struct gdbarch *gdbarch, | |
399 | const struct block *expr_block, | |
400 | CORE_ADDR expr_pc) const | |
401 | { | |
402 | gdb_assert_not_reached ("language_defn::compute_program"); | |
403 | } | |
404 | ||
fb8006fd AB |
405 | /* Hash the given symbol search name. */ |
406 | virtual unsigned int search_name_hash (const char *name) const; | |
407 | ||
6f827019 AB |
408 | /* Demangle a symbol according to this language's rules. Unlike |
409 | la_demangle, this does not take any options. | |
410 | ||
411 | *DEMANGLED will be set by this function. | |
412 | ||
413 | If this function returns false, then *DEMANGLED must always be set | |
414 | to NULL. | |
415 | ||
416 | If this function returns true, the implementation may set this to | |
417 | a xmalloc'd string holding the demangled form. However, it is | |
418 | not required to. The string, if any, is owned by the caller. | |
419 | ||
420 | The resulting string should be of the form that will be | |
421 | installed into a symbol. */ | |
422 | virtual bool sniff_from_mangled_name (const char *mangled, | |
423 | char **demangled) const | |
424 | { | |
425 | *demangled = nullptr; | |
426 | return false; | |
427 | } | |
428 | ||
0a50df5d AB |
429 | /* Return demangled language symbol version of MANGLED, or NULL. */ |
430 | virtual char *demangle (const char *mangled, int options) const | |
431 | { | |
432 | return nullptr; | |
433 | } | |
434 | ||
fbfb0a46 AB |
435 | /* Print a type using syntax appropriate for this language. */ |
436 | ||
437 | virtual void print_type (struct type *, const char *, struct ui_file *, int, | |
438 | int, const struct type_print_options *) const = 0; | |
439 | ||
f6eee2d0 AB |
440 | /* PC is possibly an unknown languages trampoline. |
441 | If that PC falls in a trampoline belonging to this language, return | |
442 | the address of the first pc in the real function, or 0 if it isn't a | |
443 | language tramp for this language. */ | |
444 | virtual CORE_ADDR skip_trampoline (struct frame_info *fi, CORE_ADDR pc) const | |
445 | { | |
446 | return (CORE_ADDR) 0; | |
447 | } | |
448 | ||
eff93b4d AB |
449 | /* Return class name of a mangled method name or NULL. */ |
450 | virtual char *class_name_from_physname (const char *physname) const | |
451 | { | |
452 | return nullptr; | |
453 | } | |
454 | ||
53fc67f8 AB |
455 | /* The list of characters forming word boundaries. */ |
456 | virtual const char *word_break_characters (void) const | |
457 | { | |
458 | return default_word_break_characters (); | |
459 | } | |
460 | ||
7e56227d AB |
461 | /* Add to the completion tracker all symbols which are possible |
462 | completions for TEXT. WORD is the entire command on which the | |
463 | completion is being made. If CODE is TYPE_CODE_UNDEF, then all | |
464 | symbols should be examined; otherwise, only STRUCT_DOMAIN symbols | |
465 | whose type has a code of CODE should be matched. */ | |
466 | ||
467 | virtual void collect_symbol_completion_matches | |
468 | (completion_tracker &tracker, | |
469 | complete_symbol_mode mode, | |
470 | symbol_name_match_type name_match_type, | |
471 | const char *text, | |
472 | const char *word, | |
473 | enum type_code code) const | |
474 | { | |
475 | return default_collect_symbol_completion_matches_break_on | |
476 | (tracker, mode, name_match_type, text, word, "", code); | |
477 | } | |
478 | ||
a78a19b1 AB |
479 | /* This is a function that lookup_symbol will call when it gets to |
480 | the part of symbol lookup where C looks up static and global | |
481 | variables. This default implements the basic C lookup rules. */ | |
482 | ||
483 | virtual struct block_symbol lookup_symbol_nonlocal | |
484 | (const char *name, | |
485 | const struct block *block, | |
486 | const domain_enum domain) const; | |
487 | ||
f16a9f57 AB |
488 | /* Return an expression that can be used for a location |
489 | watchpoint. TYPE is a pointer type that points to the memory | |
490 | to watch, and ADDR is the address of the watched memory. */ | |
491 | virtual gdb::unique_xmalloc_ptr<char> watch_location_expression | |
492 | (struct type *type, CORE_ADDR addr) const; | |
493 | ||
0874fd07 AB |
494 | /* List of all known languages. */ |
495 | static const struct language_defn *languages[nr_languages]; | |
c9debfb9 | 496 | |
a1d1fa3e AB |
497 | /* Print a top-level value using syntax appropriate for this language. */ |
498 | virtual void value_print (struct value *val, struct ui_file *stream, | |
499 | const struct value_print_options *options) const; | |
500 | ||
ebe2334e AB |
501 | /* Print a value using syntax appropriate for this language. RECURSE is |
502 | the recursion depth. It is zero-based. */ | |
503 | virtual void value_print_inner | |
504 | (struct value *val, struct ui_file *stream, int recurse, | |
505 | const struct value_print_options *options) const; | |
506 | ||
87afa652 AB |
507 | /* Parser function. */ |
508 | ||
509 | virtual int parser (struct parser_state *ps) const; | |
510 | ||
1bf9c363 AB |
511 | /* Given an expression *EXPP created by prefixifying the result of |
512 | la_parser, perform any remaining processing necessary to complete its | |
513 | translation. *EXPP may change; la_post_parser is responsible for | |
514 | releasing its previous contents, if necessary. If VOID_CONTEXT_P, | |
515 | then no value is expected from the expression. If COMPLETING is | |
516 | non-zero, then the expression has been parsed for completion, not | |
517 | evaluation. */ | |
518 | ||
519 | virtual void post_parser (expression_up *expp, int void_context_p, | |
520 | int completing, | |
521 | innermost_block_tracker *tracker) const | |
522 | { | |
523 | /* By default the post-parser does nothing. */ | |
524 | } | |
525 | ||
ec8cec5b AB |
526 | /* Print the character CH (of type CHTYPE) on STREAM as part of the |
527 | contents of a literal string whose delimiter is QUOTER. */ | |
528 | ||
529 | virtual void emitchar (int ch, struct type *chtype, | |
530 | struct ui_file *stream, int quoter) const; | |
531 | ||
52b50f2c AB |
532 | virtual void printchar (int ch, struct type *chtype, |
533 | struct ui_file * stream) const; | |
534 | ||
d711ee67 AB |
535 | /* Print the character string STRING, printing at most LENGTH characters. |
536 | Printing stops early if the number hits print_max; repeat counts | |
537 | are printed as appropriate. Print ellipses at the end if we | |
538 | had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. */ | |
539 | ||
540 | virtual void printstr (struct ui_file *stream, struct type *elttype, | |
541 | const gdb_byte *string, unsigned int length, | |
542 | const char *encoding, int force_ellipses, | |
543 | const struct value_print_options *options) const; | |
544 | ||
4ffc13fb AB |
545 | |
546 | /* Print a typedef using syntax appropriate for this language. | |
547 | TYPE is the underlying type. NEW_SYMBOL is the symbol naming | |
548 | the type. STREAM is the output stream on which to print. */ | |
549 | ||
550 | virtual void print_typedef (struct type *type, struct symbol *new_symbol, | |
551 | struct ui_file *stream) const; | |
552 | ||
39e7ecca AB |
553 | /* Return true if TYPE is a string type. */ |
554 | virtual bool is_string_type_p (struct type *type) const; | |
555 | ||
c9debfb9 AB |
556 | protected: |
557 | ||
558 | /* This is the overridable part of the GET_SYMBOL_NAME_MATCHER method. | |
559 | See that method for a description of the arguments. */ | |
560 | ||
561 | virtual symbol_name_matcher_ftype *get_symbol_name_matcher_inner | |
562 | (const lookup_name_info &lookup_name) const; | |
0874fd07 AB |
563 | }; |
564 | ||
c906108c SS |
565 | /* Pointer to the language_defn for our current language. This pointer |
566 | always points to *some* valid struct; it can be used without checking | |
567 | it for validity. | |
568 | ||
569 | The current language affects expression parsing and evaluation | |
570 | (FIXME: it might be cleaner to make the evaluation-related stuff | |
571 | separate exp_opcodes for each different set of semantics. We | |
572 | should at least think this through more clearly with respect to | |
573 | what happens if the language is changed between parsing and | |
574 | evaluation) and printing of things like types and arrays. It does | |
575 | *not* affect symbol-reading-- each source file in a symbol-file has | |
576 | its own language and we should keep track of that regardless of the | |
577 | language when symbols are read. If we want some manual setting for | |
578 | the language of symbol files (e.g. detecting when ".c" files are | |
7e73cedf | 579 | C++), it should be a separate setting from the current_language. */ |
c906108c SS |
580 | |
581 | extern const struct language_defn *current_language; | |
582 | ||
583 | /* Pointer to the language_defn expected by the user, e.g. the language | |
584 | of main(), or the language we last mentioned in a message, or C. */ | |
585 | ||
586 | extern const struct language_defn *expected_language; | |
587 | ||
34916edc CB |
588 | /* Warning issued when current_language and the language of the current |
589 | frame do not match. */ | |
590 | ||
591 | extern const char lang_frame_mismatch_warn[]; | |
592 | ||
c906108c SS |
593 | /* language_mode == |
594 | language_mode_auto: current_language automatically set upon selection | |
c5aa993b | 595 | of scope (e.g. stack frame) |
c906108c SS |
596 | language_mode_manual: current_language set only by user. */ |
597 | ||
598 | extern enum language_mode | |
c5aa993b JM |
599 | { |
600 | language_mode_auto, language_mode_manual | |
601 | } | |
602 | language_mode; | |
b62f3443 | 603 | |
fbb06eb1 UW |
604 | struct type *language_bool_type (const struct language_defn *l, |
605 | struct gdbarch *gdbarch); | |
606 | ||
b62f3443 JB |
607 | struct type *language_string_char_type (const struct language_defn *l, |
608 | struct gdbarch *gdbarch); | |
609 | ||
1994afbf DE |
610 | /* Look up type NAME in language L, and return its definition for architecture |
611 | GDBARCH. Returns NULL if not found. */ | |
612 | ||
46b0da17 DE |
613 | struct type *language_lookup_primitive_type (const struct language_defn *l, |
614 | struct gdbarch *gdbarch, | |
615 | const char *name); | |
b62f3443 | 616 | |
1994afbf DE |
617 | /* Wrapper around language_lookup_primitive_type to return the |
618 | corresponding symbol. */ | |
619 | ||
620 | struct symbol * | |
621 | language_lookup_primitive_type_as_symbol (const struct language_defn *l, | |
622 | struct gdbarch *gdbarch, | |
623 | const char *name); | |
624 | ||
c906108c SS |
625 | \f |
626 | /* These macros define the behaviour of the expression | |
627 | evaluator. */ | |
628 | ||
1777feb0 | 629 | /* Should we range check values against the domain of their type? */ |
c906108c SS |
630 | #define RANGE_CHECK (range_check != range_check_off) |
631 | ||
1777feb0 MS |
632 | /* "cast" really means conversion. */ |
633 | /* FIXME -- should be a setting in language_defn. */ | |
cc73bb8c TT |
634 | #define CAST_IS_CONVERSION(LANG) ((LANG)->la_language == language_c || \ |
635 | (LANG)->la_language == language_cplus || \ | |
636 | (LANG)->la_language == language_objc) | |
c906108c | 637 | |
a14ed312 | 638 | extern void language_info (int); |
c906108c | 639 | |
a14ed312 | 640 | extern enum language set_language (enum language); |
c906108c | 641 | \f |
c5aa993b | 642 | |
c906108c SS |
643 | /* This page contains functions that return things that are |
644 | specific to languages. Each of these functions is based on | |
645 | the current setting of working_lang, which the user sets | |
1777feb0 | 646 | with the "set language" command. */ |
c906108c | 647 | |
79d43c61 | 648 | #define LA_PRINT_TYPE(type,varstring,stream,show,level,flags) \ |
fbfb0a46 | 649 | (current_language->print_type(type,varstring,stream,show,level,flags)) |
c906108c | 650 | |
5c6ce71d | 651 | #define LA_PRINT_TYPEDEF(type,new_symbol,stream) \ |
4ffc13fb | 652 | (current_language->print_typedef (type,new_symbol,stream)) |
5c6ce71d | 653 | |
79a45b7d | 654 | #define LA_VALUE_PRINT(val,stream,options) \ |
a1d1fa3e | 655 | (current_language->value_print (val,stream,options)) |
c906108c | 656 | |
6c7a06a3 | 657 | #define LA_PRINT_CHAR(ch, type, stream) \ |
52b50f2c | 658 | (current_language->printchar (ch, type, stream)) |
3e43a32a | 659 | #define LA_PRINT_STRING(stream, elttype, string, length, encoding, force_ellipses, options) \ |
d711ee67 AB |
660 | (current_language->printstr (stream, elttype, string, length, \ |
661 | encoding, force_ellipses,options)) | |
6c7a06a3 | 662 | #define LA_EMIT_CHAR(ch, type, stream, quoter) \ |
ec8cec5b | 663 | (current_language->emitchar (ch, type, stream, quoter)) |
c906108c | 664 | |
53a47a3e | 665 | #define LA_PRINT_ARRAY_INDEX(index_type, index_value, stream, options) \ |
5bd40f2a AB |
666 | (current_language->print_array_index(index_type, index_value, stream, \ |
667 | options)) | |
e79af960 | 668 | |
14bc53a8 | 669 | #define LA_ITERATE_OVER_SYMBOLS(BLOCK, NAME, DOMAIN, CALLBACK) \ |
4009ee92 | 670 | (current_language->iterate_over_symbols (BLOCK, NAME, DOMAIN, CALLBACK)) |
f8eba3c6 | 671 | |
c906108c SS |
672 | /* Test a character to decide whether it can be printed in literal form |
673 | or needs to be printed in another representation. For example, | |
674 | in C the literal form of the character with octal value 141 is 'a' | |
675 | and the "other representation" is '\141'. The "other representation" | |
1777feb0 | 676 | is program language dependent. */ |
c906108c SS |
677 | |
678 | #define PRINT_LITERAL_FORM(c) \ | |
679 | ((c) >= 0x20 \ | |
680 | && ((c) < 0x7F || (c) >= 0xA0) \ | |
681 | && (!sevenbit_strings || (c) < 0x80)) | |
682 | ||
c906108c SS |
683 | /* Type predicates */ |
684 | ||
a14ed312 | 685 | extern int pointer_type (struct type *); |
c906108c | 686 | |
c906108c SS |
687 | /* Error messages */ |
688 | ||
a0b31db1 | 689 | extern void range_error (const char *, ...) ATTRIBUTE_PRINTF (1, 2); |
c906108c SS |
690 | |
691 | /* Data: Does this value represent "truth" to the current language? */ | |
692 | ||
a14ed312 | 693 | extern int value_true (struct value *); |
c906108c | 694 | |
c906108c SS |
695 | /* Misc: The string representing a particular enum language. */ |
696 | ||
2039bd9f | 697 | extern enum language language_enum (const char *str); |
c906108c | 698 | |
a14ed312 | 699 | extern const struct language_defn *language_def (enum language); |
7a292a7a | 700 | |
27cd387b | 701 | extern const char *language_str (enum language); |
c906108c | 702 | |
1777feb0 | 703 | /* Check for a language-specific trampoline. */ |
f636b87d | 704 | |
52f729a7 | 705 | extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc); |
f636b87d | 706 | |
9a3d7dfd AF |
707 | /* Return demangled language symbol, or NULL. */ |
708 | extern char *language_demangle (const struct language_defn *current_language, | |
709 | const char *mangled, int options); | |
710 | ||
9d084466 TBA |
711 | /* Return information about whether TYPE should be passed |
712 | (and returned) by reference at the language level. */ | |
713 | struct language_pass_by_ref_info language_pass_by_reference (struct type *type); | |
5c6ce71d | 714 | |
b4be9fad TT |
715 | void c_get_string (struct value *value, |
716 | gdb::unique_xmalloc_ptr<gdb_byte> *buffer, | |
717 | int *length, struct type **char_type, | |
718 | const char **charset); | |
ae6a3a4c | 719 | |
b5ec771e | 720 | /* Get LANG's symbol_name_matcher method for LOOKUP_NAME. Returns |
c63d3e8d PA |
721 | default_symbol_name_matcher if not set. LANG is used as a hint; |
722 | the function may ignore it depending on the current language and | |
723 | LOOKUP_NAME. Specifically, if the current language is Ada, this | |
724 | may return an Ada matcher regardless of LANG. */ | |
618daa93 | 725 | symbol_name_matcher_ftype *get_symbol_name_matcher |
b5ec771e PA |
726 | (const language_defn *lang, const lookup_name_info &lookup_name); |
727 | ||
e3ad2841 TT |
728 | /* Save the current language and restore it upon destruction. */ |
729 | ||
730 | class scoped_restore_current_language | |
731 | { | |
732 | public: | |
733 | ||
734 | explicit scoped_restore_current_language () | |
735 | : m_lang (current_language->la_language) | |
736 | { | |
737 | } | |
738 | ||
739 | ~scoped_restore_current_language () | |
740 | { | |
741 | set_language (m_lang); | |
742 | } | |
743 | ||
744 | scoped_restore_current_language (const scoped_restore_current_language &) | |
745 | = delete; | |
746 | scoped_restore_current_language &operator= | |
747 | (const scoped_restore_current_language &) = delete; | |
748 | ||
749 | private: | |
750 | ||
751 | enum language m_lang; | |
752 | }; | |
753 | ||
9e6a1ab6 PW |
754 | /* If language_mode is language_mode_auto, |
755 | then switch current language to the language of SYM | |
756 | and restore current language upon destruction. | |
757 | ||
758 | Else do nothing. */ | |
759 | ||
760 | class scoped_switch_to_sym_language_if_auto | |
761 | { | |
762 | public: | |
763 | ||
764 | explicit scoped_switch_to_sym_language_if_auto (const struct symbol *sym) | |
765 | { | |
766 | if (language_mode == language_mode_auto) | |
767 | { | |
768 | m_lang = current_language->la_language; | |
769 | m_switched = true; | |
c1b5c1eb | 770 | set_language (sym->language ()); |
9e6a1ab6 PW |
771 | } |
772 | else | |
ae73e2e2 TT |
773 | { |
774 | m_switched = false; | |
775 | /* Assign to m_lang to silence a GCC warning. See | |
776 | https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80635. */ | |
777 | m_lang = language_unknown; | |
778 | } | |
9e6a1ab6 PW |
779 | } |
780 | ||
781 | ~scoped_switch_to_sym_language_if_auto () | |
782 | { | |
783 | if (m_switched) | |
784 | set_language (m_lang); | |
785 | } | |
786 | ||
787 | DISABLE_COPY_AND_ASSIGN (scoped_switch_to_sym_language_if_auto); | |
788 | ||
789 | private: | |
790 | bool m_switched; | |
791 | enum language m_lang; | |
792 | }; | |
793 | ||
c5aa993b | 794 | #endif /* defined (LANGUAGE_H) */ |