/usr/include/hfst/parsers/OtherSymbolTransducer.h is in libhfst-dev 3.13.0~r3461-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//!
//! @brief Transducers with other-symbols.
//!
//! @author Miikka Silfverberg
// 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, version 3 of the License.
//
// 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, see <http://www.gnu.org/licenses/>.
#ifndef OTHER_SYMBOL_TRANSDUCER_H_
#define OTHER_SYMBOL_TRANSDUCER_H_
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "../../../../libhfst/src/HfstTransducer.h"
#include "HfstTwolcDefs.h"
#include "grammar_defs.h"
#include "../string_src/string_manipulation.h"
#include <vector>
#include <map>
#include <algorithm>
#include <iostream>
#include <string>
using hfst::HfstTransducer;
using hfst::ImplementationType;
using hfst::implementations::HfstState;
using hfst::implementations::HfstBasicTransducer;
using hfst::implementations::HfstBasicTransition;
using hfst::implementations::HfstState;
typedef std::set<HfstBasicTransition> HfstBasicTransitionSet;
typedef std::pair<HfstState,HfstState> StatePair;
class EmptySymbolPairSet
{};
class UndefinedSymbolPairsFound
{};
static const std::string TWOLC_IDENTITY = "@_TWOLC_IDENTITY_SYMBOL_@";
static const std::string HFST_IDENTITY = "@_IDENTITY_SYMBOL_@";
static const std::string HFST_UNKNOWN = "@_UNKNOWN_SYMBOL_@";
static const std::string HFST_EPSILON = "@_EPSILON_SYMBOL_@";
static const std::string TWOLC_UNKNOWN = "__HFST_TWOLC_?";
static const std::string TWOLC_DIAMOND = "__HFST_TWOLC_DIAMOND";
static const std::string TWOLC_EPSILON = "__HFST_TWOLC_0";
static const std::string TWOLC_FREELY_INSERT = "__HFST_TWOLC_FREELY_INSERT";
//! @brief Pointer to a member function of @a HfstTransducer taking zero
//! arguments.
typedef HfstTransducer &(HfstTransducer::*HfstTransducerZeroArgMember) (void);
//! @brief Pointer to a member function of @a HfstTransducer taking one
//! argument.
typedef HfstTransducer &(HfstTransducer::*HfstTransducerOneArgMember)
(const HfstTransducer &);
//! @brief Pointer to a member function of @a HfstTransducer taking one
//! argument.
typedef HfstTransducer &(HfstTransducer::*HfstTransducerBoolArgMember)
(const HfstTransducer &, bool);
//! @brief Pointer to a member function of @a HfstTransducer taking one
//! argument and returning a boolean.
typedef bool (HfstTransducer::*HfstTransducerOneArgMemberBool)
(const HfstTransducer &) const;
//! @brief Pointer to a member function of @a HfstTransducer taking one
//! unsigned int argument.
typedef HfstTransducer &(HfstTransducer::*HfstTransducerOneNumArgMember)
(unsigned int);
//! @brief Pointer to a member function of @a HfstTransducer taking two
//! unsigned int arguments.
typedef HfstTransducer &(HfstTransducer::*HfstTransducerTwoNumArgMember)
(unsigned int,unsigned int);
//! @brief Pointer to a member function of @a HfstTransducer taking one
//! const SymbolPair& argument.
typedef HfstTransducer &(HfstTransducer::*HfstTransducerOneSymbolPairArgMember)
(const SymbolPair &);
typedef HfstTransducer &(HfstTransducer::*HfstTransducerOneSymbolPairBoolArgMember)
(const SymbolPair &, bool);
//! @brief Pointer to member function of @A HfstTransducer taking two
//! strings and two booleans as arguments.
typedef HfstTransducer &(HfstTransducer::*HfstTransducerSubstMember)
(const std::string&,const std::string &,bool,bool);
//! @brief Pointer to member function of @A HfstTransducer taking two
//! @a SymbolPairs as arguments.
typedef HfstTransducer &(HfstTransducer::*HfstTransducerSubstPairMember)
(const SymbolPair &,const SymbolPair &);
//! @brief Pointer to member function of @A HfstTransducer taking a
//! @a SymbolPair and an @a HfstTransducer as arguments.
typedef HfstTransducer &(HfstTransducer::*HfstTransducerSubstPairFstMember)
(const SymbolPair &,HfstTransducer &,bool);
//! @brief For calling a pointer to a member function passed as argument.
#define CALL_MEMBER_FN(object,ptr_to_member) ((object).*(ptr_to_member))
class Rule;
class OtherSymbolTransducer
{
protected:
static HandySet<std::string> input_symbols;
static HandySet<std::string> output_symbols;
static HandySet<std::string> diacritics;
static HandySet<SymbolPair> symbol_pairs;
static ImplementationType transducer_type;
bool is_broken;
HfstTransducer transducer;
void check_pair(const std::string &input_symbol,
const std::string &output_symbol);
void add_diamond_transition(void);
static bool empty(const HfstBasicTransducer &fsm);
public:
//! @brief Define the set of possible symbol-pairs.
static void set_symbol_pairs(const HandySet<SymbolPair> &symbol_pairs);
//! @brief Define the set of possible symbol-pairs.
static void define_diacritics(const std::vector<std::string> &diacritics);
//! @brief Set the type of transducer to be used
static void set_transducer_type(ImplementationType transducer_type);
//! @brief Construct empty transducer.
OtherSymbolTransducer(void);
//! @brief Construct transducer <i>input_symbol:output_symbol</i>.
OtherSymbolTransducer(const std::string &input_symbol,
const std::string &output_symbol);
//! @brief Construct transducer <i>symbol:symbol</i>.
OtherSymbolTransducer(const std::string &symbol);
//! @brief Copy constructor.
OtherSymbolTransducer(const OtherSymbolTransducer &another);
//! @brief Set @a this equal to @another.
OtherSymbolTransducer &operator=(const OtherSymbolTransducer &another);
//! @brief Apply @a p onto @a this and minimize @a this.
OtherSymbolTransducer &apply(HfstTransducerZeroArgMember p);
//! @brief Apply @a p onto @a this taking @a another as argument and
//! minimize @a this.
//!
//! Before applying @a p, harmonize the other-symbols in @a this and
//! @a another.
OtherSymbolTransducer
&apply(const HfstTransducerOneArgMember,
const OtherSymbolTransducer &another);
OtherSymbolTransducer
&apply(const HfstTransducerBoolArgMember,
const OtherSymbolTransducer &another);
//! @brief Call @a p of @a this taking @a another as argument.
//!
bool
apply(const HfstTransducerOneArgMemberBool,
const OtherSymbolTransducer &another) const;
//! @brief Apply @a p onto @a this taking @a num as argument and
//! minimize @a this.
OtherSymbolTransducer
&apply(const HfstTransducerOneNumArgMember,unsigned int number);
//! @brief Apply @a p onto @a this taking @a num1 and @a num2 as arguments
//! and minimize @a this.
OtherSymbolTransducer
&apply(const HfstTransducerTwoNumArgMember,unsigned int num1,
unsigned int num2);
//! @brief Apply @a p onto @a this taking @a pair as argument and
//! minimize @a this.
OtherSymbolTransducer
&apply
(const HfstTransducerOneSymbolPairArgMember,const SymbolPair &pair);
OtherSymbolTransducer
&apply
(const HfstTransducerOneSymbolPairBoolArgMember,const SymbolPair &pair, bool b);
//! @brief Apply @a p onto @a this taking @a str1, @a str2, @a b1 and @a b2
//! as arguments and minimize @a this.
OtherSymbolTransducer
&apply(const HfstTransducerSubstMember p,const std::string &str1,
const std::string &str2, bool b1, bool b2);
//! @brief Apply @a p onto @a this taking @a p1 and @a p2 as arguments and
//! minimize @a this.
OtherSymbolTransducer
&apply(const HfstTransducerSubstPairMember p,const SymbolPair &p1,
const SymbolPair &p2);
//! @brief Apply @a p onto @a this taking @a p1 and @a p2 as arguments and
//! minimize @a this.
OtherSymbolTransducer
&apply(const HfstTransducerSubstPairFstMember p,const SymbolPair &p1,
const OtherSymbolTransducer &t, bool b);
//! @brief Add one transition from the start state of @a this to a new state
//! with input and output symbol equal to @a info_symbol.
OtherSymbolTransducer &add_info_symbol(const std::string &info_symbol);
//! Add a transition to @a center_t (badly placed...).
static void add_transition
(HfstBasicTransducer ¢er_t, size_t source_state,size_t target_state,
const std::string &input, const std::string &output);
//! Return true, iff @a sym exists in the alphabet of @a t.
static bool has_symbol(const HfstBasicTransducer &t,const std::string &sym);
OtherSymbolTransducer &harmonize_diacritics(OtherSymbolTransducer &t);
//! @brief Set the state @a state final.
static void set_final(HfstBasicTransducer ¢er_t,size_t state);
//! @brief Return true, iff the intersection of @a this and @a another is
//! empty. If it is non-empty, store the first common string found in v.
bool is_empty_intersection(const OtherSymbolTransducer &another,
StringVector &);
//! @brief Return true, iff @a another is a subset of the @a this.
bool is_subset(const OtherSymbolTransducer &another);
//! @brief Return a copy where all output symbols are replaced
//! by other-symbols.
OtherSymbolTransducer get_inverse_of_upper_projection(void);
//! @brief Perform the effect of <tt>?* X ?*</tt> where <tt>X</tt> is
//! @a this.
OtherSymbolTransducer &contained(void);
//! @brief Perform the effect of <tt>?* X ?* - ?* X ?* X ?* </tt> where
//! <tt>X</tt> is @a this.
OtherSymbolTransducer &contained_once(void);
//! @brief Perform the equivalent of <tt>?* - X</tt> where <tt>X</tt> is
//! @a this.
OtherSymbolTransducer &negated(void);
//! @brief Perform the equivalent of <tt>? - X</tt> where <tt>X</tt> is
//! @a this.
OtherSymbolTransducer &term_complemented(void);
//! @brief Return a rule context <tt>X D ?* D Y</tt> where <tt>X</tt> is the
//! left context, <tt>Y</tt> is the right context, <tt>D</tt> is the
//! diamond symbol <tt>__HFST_TWOLC_DIAMOND</tt>.
static OtherSymbolTransducer get_context(OtherSymbolTransducer &left,
OtherSymbolTransducer &right);
//! @brief Get a transducer recogninzing any pair.
static OtherSymbolTransducer get_universal(void);
//! @brief Add @a symbol to the alphabet of @a this. Prevents harmonization
//! of the symbol.
void add_symbol_to_alphabet(const std::string &symbol);
//! @brief Replace diacritics from output-side.
void remove_diacritics_from_output(void);
HfstTransducer get_transducer(void) const;
//! @brief Return the symbol pairs in the transitions from the start state.
void get_initial_transition_pairs(SymbolPairVector &pair_container) const;
//! @brief Return true if this is empty and false otherwise.
bool is_empty(void) const;
friend class Rule;
friend std::ostream &operator<<(std::ostream &,
const OtherSymbolTransducer &);
};
//! @brief Container for OtherSymbolTransducers.
typedef std::vector<OtherSymbolTransducer> OtherSymbolTransducerVector;
//! @brief Container for named regular expressions represented as
//! @a OtherSymbolTransducer objects.
typedef std::map<std::string,OtherSymbolTransducer> NameToRegexMap;
//! @brief Display an @a OtherSymbolTransducer
std::ostream &operator<<(std::ostream &,const OtherSymbolTransducer &);
#endif // OTHER_SYMBOL_TRANSDUCER_H_
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