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37 * Handling of intermediate selection parser data.
39 * The data types declared in this header are used by the parser to store
40 * intermediate data when constructing method expressions.
41 * In particular, the parameters for the method are stored.
42 * The intermediate data is freed once a gmx::SelectionTreeElement object can
45 * This is an implementation header: there should be no need to use it outside
48 * \author Teemu Murtola <teemu.murtola@gmail.com>
49 * \ingroup module_selection
51 #ifndef GMX_SELECTION_PARSETREE_H
52 #define GMX_SELECTION_PARSETREE_H
58 #include "gromacs/math/vec.h"
59 #include "gromacs/math/vectypes.h"
60 #include "gromacs/utility/gmxassert.h"
61 #include "gromacs/utility/real.h"
62 #include "gromacs/utility/uniqueptr.h"
67 struct gmx_ana_indexgrps_t;
68 struct gmx_ana_selmethod_t;
69 struct gmx_ana_selparam_t;
76 * String matching mode for string keyword expressions.
78 * \ingroup module_selection
80 enum SelectionStringMatchType
82 eStringMatchType_Auto, //!< Deduce from the string.
83 eStringMatchType_Exact, //!< Match as a literal string.
84 eStringMatchType_Wildcard, //!< Match using ? and * as wildcards.
85 eStringMatchType_RegularExpression //!< Match using regular expressions.
89 class SelectionParserValue;
91 //! Container for a list of SelectionParserValue objects.
92 typedef std::list<SelectionParserValue>
93 SelectionParserValueList;
94 //! Smart pointer type for managing a SelectionParserValueList.
95 typedef gmx::gmx_unique_ptr<SelectionParserValueList>::type
96 SelectionParserValueListPointer;
100 * Describes a parsed value, possibly resulting from expression evaluation.
102 * All factory methods and the constructors may throw an std::bad_alloc if
105 * \ingroup module_selection
107 class SelectionParserValue
110 //! Allocates and initializes an empty value list.
111 static SelectionParserValueListPointer createList()
113 return SelectionParserValueListPointer(new SelectionParserValueList);
116 * Allocates and initializes a value list with a single value.
118 * \param[in] value Initial value to put in the list.
119 * \returns Pointer to a new value list that contains \p value.
121 static SelectionParserValueListPointer
122 createList(const SelectionParserValue &value)
124 SelectionParserValueListPointer list(new SelectionParserValueList);
125 list->push_back(value);
129 * Allocates and initializes an expression value.
131 * \param[in] expr Root of the expression tree to assign to the value.
132 * \returns The newly created value.
134 static SelectionParserValue
135 createExpr(const gmx::SelectionTreeElementPointer &expr)
137 return SelectionParserValue(expr);
140 * Allocates and initializes a constant integer value.
142 * \param[in] value Integer value to assign to the value.
143 * \param[in] location Location of the value.
144 * \returns The newly created value.
146 static SelectionParserValue
147 createInteger(int value, const SelectionLocation &location)
149 SelectionParserValue result(INT_VALUE, location);
150 result.u.i.i1 = result.u.i.i2 = value;
154 * Allocates and initializes a constant integer range value.
156 * \param[in] from Beginning of the range to assign to the value.
157 * \param[in] to End of the range to assign to the value.
158 * \param[in] location Location of the value.
159 * \returns The newly created value.
161 static SelectionParserValue
162 createIntegerRange(int from, int to, const SelectionLocation &location)
164 SelectionParserValue result(INT_VALUE, location);
165 result.u.i.i1 = from;
170 * Allocates and initializes a constant floating-point value.
172 * \param[in] value Floating-point value to assign to the value.
173 * \param[in] location Location of the value.
174 * \returns The newly created value.
176 static SelectionParserValue
177 createReal(real value, const SelectionLocation &location)
179 SelectionParserValue result(REAL_VALUE, location);
180 result.u.r.r1 = result.u.r.r2 = value;
184 * Allocates and initializes a constant floating-point range value.
186 * \param[in] from Beginning of the range to assign to the value.
187 * \param[in] to End of the range to assign to the value.
188 * \param[in] location Location of the value.
189 * \returns The newly created value.
191 static SelectionParserValue
192 createRealRange(real from, real to, const SelectionLocation &location)
194 SelectionParserValue result(REAL_VALUE, location);
195 result.u.r.r1 = from;
200 * Allocates and initializes a constant string value.
202 * \param[in] value String to assign to the value.
203 * \param[in] location Location of the value.
204 * \returns The newly created value.
206 static SelectionParserValue
207 createString(const char *value, const SelectionLocation &location)
209 SelectionParserValue result(STR_VALUE, location);
214 * Allocates and initializes a constant position value.
216 * \param[in] value Position vector to assign to the value.
217 * \param[in] location Location of the value.
218 * \returns The newly created value.
220 static SelectionParserValue
221 createPosition(rvec value, const SelectionLocation &location)
223 SelectionParserValue result(POS_VALUE, location);
224 copy_rvec(value, result.u.x);
228 //! Returns the location of this value in the parsed selection text.
229 const SelectionLocation &location() const { return location_; }
230 //! Returns true if the value comes from expression evaluation.
231 bool hasExpressionValue() const { return static_cast<bool>(expr); }
233 //! Returns the string value (\a type must be ::STR_VALUE).
234 const std::string &stringValue() const
236 GMX_ASSERT(type == STR_VALUE && !hasExpressionValue(),
237 "Attempted to retrieve string value from a non-string value");
241 // TODO: boost::any or similar could be nicer for the implementation.
242 //! Type of the value.
244 //! Expression pointer if the value is the result of an expression.
245 gmx::SelectionTreeElementPointer expr;
246 //! String value for \a type ::STR_VALUE.
248 //! The actual value if \a expr is NULL and \a type is not ::STR_VALUE.
250 //! The integer value/range (\a type ::INT_VALUE).
252 //! Beginning of the range.
254 //! End of the range; equals \a i1 for a single integer.
257 //! The real value/range (\a type ::REAL_VALUE).
259 //! Beginning of the range.
261 //! End of the range; equals \a r1 for a single number.
264 //! The position value (\a type ::POS_VALUE).
270 * Initializes a new value.
272 * \param[in] type Type for the new value.
273 * \param[in] location Location for the value.
275 SelectionParserValue(e_selvalue_t type, const SelectionLocation &location);
277 * Initializes a new expression value.
279 * \param[in] expr Expression for the value.
281 explicit SelectionParserValue(const gmx::SelectionTreeElementPointer &expr);
283 //! Location of the value in the parsed text.
284 SelectionLocation location_;
287 class SelectionParserParameter;
289 //! Container for a list of SelectionParserParameter objects.
290 typedef std::list<SelectionParserParameter>
291 SelectionParserParameterList;
292 //! Smart pointer type for managing a SelectionParserParameterList.
293 typedef gmx::gmx_unique_ptr<SelectionParserParameterList>::type
294 SelectionParserParameterListPointer;
297 * Describes a parsed method parameter.
299 * \ingroup module_selection
301 class SelectionParserParameter
304 //! Allocates and initializes an empty parameter list.
305 static SelectionParserParameterListPointer createList()
307 return SelectionParserParameterListPointer(
308 new SelectionParserParameterList);
311 * Allocates and initializes a parsed method parameter.
313 * \param[in] name Name for the new parameter (can be NULL).
314 * \param[in] values List of values for the parameter.
315 * \param[in] location Location of the parameter.
316 * \returns Pointer to the newly allocated parameter.
317 * \throws std::bad_alloc if out of memory.
319 static SelectionParserParameter
320 create(const char *name, SelectionParserValueListPointer values,
321 const SelectionLocation &location)
323 return SelectionParserParameter(name, move(values), location);
325 //! \copydoc create(const char *, SelectionParserValueListPointer, const SelectionLocation &)
326 static SelectionParserParameter
327 create(const std::string &name, SelectionParserValueListPointer values,
328 const SelectionLocation &location)
330 return SelectionParserParameter(name.c_str(), move(values), location);
333 * Allocates and initializes a parsed method parameter.
335 * \param[in] name Name for the new parameter (can be NULL).
336 * \param[in] value Value for the parameter.
337 * \param[in] location Location of the parameter.
338 * \returns Pointer to the newly allocated parameter.
339 * \throws std::bad_alloc if out of memory.
341 * This overload is a convenience wrapper for the case when creating
342 * parameters outside the actual Bison parser and only a single value
345 static SelectionParserParameter
346 create(const char *name, const SelectionParserValue &value,
347 const SelectionLocation &location)
349 return create(name, SelectionParserValue::createList(value), location);
352 * Allocates and initializes a parsed method parameter.
354 * \param[in] name Name for the new parameter (can be NULL).
355 * \param[in] expr Expression value for the parameter.
356 * \returns Pointer to the newly allocated parameter.
357 * \throws std::bad_alloc if out of memory.
359 * This overload is a convenience wrapper for the case when creating
360 * parameters outside the actual Bison parser and only a single
361 * expression value is necessary.
363 static SelectionParserParameter
364 createFromExpression(const char *name,
365 const SelectionTreeElementPointer &expr)
367 return create(name, SelectionParserValue::createExpr(expr),
370 //! \copydoc createFromExpression(const char *, const SelectionTreeElementPointer &)
371 static SelectionParserParameter
372 createFromExpression(const std::string &name,
373 const SelectionTreeElementPointer &expr)
375 return create(name.c_str(), SelectionParserValue::createExpr(expr),
379 //! Returns the name of the parameter (may be empty).
380 const std::string &name() const { return name_; }
381 //! Returns the location of this parameter in the parsed selection text.
382 const SelectionLocation &location() const { return location_; }
383 //! Returns the values for the parameter.
384 const SelectionParserValueList &values() const { return *values_; }
388 * Initializes a parsed method parameter.
390 * \param[in] name Name for the new parameter (can be NULL).
391 * \param[in] values List of values for the parameter.
392 * \param[in] location Location of the parameter.
393 * \throws std::bad_alloc if out of memory.
395 SelectionParserParameter(const char *name,
396 SelectionParserValueListPointer values,
397 const SelectionLocation &location);
399 //! Name of the parameter.
401 //! Location of the parameter in the parsed text.
402 SelectionLocation location_;
404 // TODO: Make private, there is only one direct user.
406 //! Values for this parameter.
407 SelectionParserValueListPointer values_;
412 /** Error reporting function for the selection parser. */
414 _gmx_selparser_error(void *scanner, const char *fmt, ...);
416 * Handles exceptions caught within the Bison code.
418 * \retval `true` if the parser should attempt error recovery.
419 * \retval `false` if the parser should immediately abort.
421 * This function is called whenever an exception is caught within Bison
422 * actions. Since exceptions cannot propagate through Bison code, the
423 * exception is saved (potentially with some extra context information) so that
424 * the caller of the parser can rethrow the exception.
426 * If it is possible to recover from the exception, then the function returns
427 * `true`, and Bison enters error recovery state. At the end of the recovery,
428 * _gmx_selparser_handle_error() is called.
429 * If this function returns false, then Bison immediately aborts the parsing
430 * so that the caller can rethrow the exception.
433 _gmx_selparser_handle_exception(void *scanner, std::exception *ex);
435 * Handles errors in the selection parser.
437 * \returns `true` if parsing can continue with the next selection.
438 * \throws std::bad_alloc if out of memory during the error processing.
439 * \throws unspecified Can throw the stored exception if recovery from that
440 * exception is not possible.
442 * This function is called during error recovery, after Bison has discarded all
443 * the symbols for the erroneous selection.
444 * At this point, the full selection that caused the error is known, and can be
445 * added to the error context.
447 * For an interactive parser, this function returns `true` to let the parsing
448 * continue with the next selection, or to let the user enter the next
449 * selection, if it was possible to recover from the exception.
450 * For other cases, this will either rethrow the original exception with added
451 * context, or return `false` after adding the context to the error reporter.
452 * Any exceptions thrown from this method are again caught by Bison and result
453 * in termination of the parsing; the caller can then rethrow them.
456 _gmx_selparser_handle_error(void *scanner);
458 /** Propagates the flags for selection elements. */
460 _gmx_selelem_update_flags(const gmx::SelectionTreeElementPointer &sel);
462 /** Initializes the method parameter data of \ref SEL_EXPRESSION and
463 * \ref SEL_MODIFIER elements. */
465 _gmx_selelem_init_method_params(const gmx::SelectionTreeElementPointer &sel,
467 /** Initializes the method for a \ref SEL_EXPRESSION selection element. */
469 _gmx_selelem_set_method(const gmx::SelectionTreeElementPointer &sel,
470 struct gmx_ana_selmethod_t *method, void *scanner);
472 /* An opaque pointer. */
473 #ifndef YY_TYPEDEF_YY_SCANNER_T
474 #define YY_TYPEDEF_YY_SCANNER_T
475 typedef void* yyscan_t;
477 /** \brief Creates a gmx::SelectionTreeElement for arithmetic expression evaluation.
479 * \param[in] left Selection element for the left hand side.
480 * \param[in] right Selection element for the right hand side.
481 * \param[in] op String representation of the operator.
482 * \param[in] scanner Scanner data structure.
483 * \returns The created selection element.
485 * This function handles the creation of a gmx::SelectionTreeElement object for
486 * arithmetic expressions.
488 gmx::SelectionTreeElementPointer
489 _gmx_sel_init_arithmetic(const gmx::SelectionTreeElementPointer &left,
490 const gmx::SelectionTreeElementPointer &right,
491 char op, yyscan_t scanner);
492 /** Creates a gmx::SelectionTreeElement for comparsion expression evaluation. */
493 gmx::SelectionTreeElementPointer
494 _gmx_sel_init_comparison(const gmx::SelectionTreeElementPointer &left,
495 const gmx::SelectionTreeElementPointer &right,
496 const char *cmpop, void *scanner);
497 /** Creates a gmx::SelectionTreeElement for a keyword expression from the parsed data. */
498 gmx::SelectionTreeElementPointer
499 _gmx_sel_init_keyword(struct gmx_ana_selmethod_t *method,
500 gmx::SelectionParserValueListPointer args,
501 const char *rpost, void *scanner);
502 /** Creates a gmx::SelectionTreeElement for string-matching keyword expression. */
503 gmx::SelectionTreeElementPointer
504 _gmx_sel_init_keyword_strmatch(struct gmx_ana_selmethod_t *method,
505 gmx::SelectionStringMatchType matchType,
506 gmx::SelectionParserValueListPointer args,
507 const char *rpost, void *scanner);
508 /** Creates a gmx::SelectionTreeElement for "keyword of" expression. */
509 gmx::SelectionTreeElementPointer
510 _gmx_sel_init_keyword_of(struct gmx_ana_selmethod_t *method,
511 const gmx::SelectionTreeElementPointer &group,
512 const char *rpost, void *scanner);
513 /** Creates a gmx::SelectionTreeElement for a method expression from the parsed data. */
514 gmx::SelectionTreeElementPointer
515 _gmx_sel_init_method(struct gmx_ana_selmethod_t *method,
516 gmx::SelectionParserParameterListPointer params,
517 const char *rpost, void *scanner);
518 /** Creates a gmx::SelectionTreeElement for a modifier expression from the parsed data. */
519 gmx::SelectionTreeElementPointer
520 _gmx_sel_init_modifier(struct gmx_ana_selmethod_t *mod,
521 gmx::SelectionParserParameterListPointer params,
522 const gmx::SelectionTreeElementPointer &sel,
524 /** Creates a gmx::SelectionTreeElement for evaluation of reference positions. */
525 gmx::SelectionTreeElementPointer
526 _gmx_sel_init_position(const gmx::SelectionTreeElementPointer &expr,
527 const char *type, void *scanner);
529 /** Creates a gmx::SelectionTreeElement for a constant position. */
530 gmx::SelectionTreeElementPointer
531 _gmx_sel_init_const_position(real x, real y, real z, void *scanner);
532 /** Creates a gmx::SelectionTreeElement for a index group expression using group name. */
533 gmx::SelectionTreeElementPointer
534 _gmx_sel_init_group_by_name(const char *name, void *scanner);
535 /** Creates a gmx::SelectionTreeElement for a index group expression using group index. */
536 gmx::SelectionTreeElementPointer
537 _gmx_sel_init_group_by_id(int id, void *scanner);
538 /** Creates a gmx::SelectionTreeElement for a variable reference */
539 gmx::SelectionTreeElementPointer
540 _gmx_sel_init_variable_ref(const gmx::SelectionTreeElementPointer &sel,
543 /** Creates a root gmx::SelectionTreeElement for a selection. */
544 gmx::SelectionTreeElementPointer
545 _gmx_sel_init_selection(const char *name,
546 const gmx::SelectionTreeElementPointer &sel,
548 /** Creates a root gmx::SelectionTreeElement elements for a variable assignment. */
549 gmx::SelectionTreeElementPointer
550 _gmx_sel_assign_variable(const char *name,
551 const gmx::SelectionTreeElementPointer &expr,
553 /** Appends a root gmx::SelectionTreeElement to a selection collection. */
554 gmx::SelectionTreeElementPointer
555 _gmx_sel_append_selection(const gmx::SelectionTreeElementPointer &sel,
556 gmx::SelectionTreeElementPointer last,
558 /** Check whether the parser should finish. */
560 _gmx_sel_parser_should_finish(void *scanner);
563 /** Initializes an array of parameters based on input from the selection parser. */
565 _gmx_sel_parse_params(const gmx::SelectionParserParameterList ¶ms,
566 int nparam, struct gmx_ana_selparam_t *param,
567 const gmx::SelectionTreeElementPointer &root,