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#ifndef CFG_FORMAT_H
#define CFG_FORMAT_H
#include <iostream>
#include <string>
#include "wordid.h"
#include "feature_vector.h"
#include "program_options.h"
struct CFGFormat {
bool identity_scfg;
bool features;
bool logprob_feat;
bool comma_nt;
bool nt_span;
std::string goal_nt_name;
std::string nt_prefix;
std::string logprob_feat_name;
std::string partsep;
bool goal_nt() const { return !goal_nt_name.empty(); }
template <class Opts> // template to support both printable_opts and boost nonprintable
void AddOptions(Opts *opts) {
//using namespace boost::program_options;
//using namespace std;
opts->add_options()
("identity_scfg",defaulted_value(&identity_scfg),"output an identity SCFG: add an identity target side - '[X12] ||| [X13,1] a ||| [1] a ||| feat= ...' - the redundant target '[1] a |||' is omitted otherwise.")
("features",defaulted_value(&features),"print the CFG feature vector")
("logprob_feat",defaulted_value(&logprob_feat),"print a LogProb=-1.5 feature irrespective of --features.")
("logprob_feat_name",defaulted_value(&logprob_feat_name),"alternate name for the LogProb feature")
("cfg_comma_nt",defaulted_value(&comma_nt),"if false, omit the usual [NP,1] ',1' variable index in the source side")
("goal_nt_name",defaulted_value(&goal_nt_name),"if nonempty, the first production will be '[goal_nt_name] ||| [x123] ||| LogProb=y' where x123 is the actual goal nt, and y is the pushed prob, if any")
("nt_prefix",defaulted_value(&nt_prefix),"NTs are [<nt_prefix>123] where 123 is the node number starting at 0, and the highest node (last in file) is the goal node in an acyclic hypergraph")
("nt_span",defaulted_value(&nt_span),"prefix A(i,j) for NT coming from hypergraph node with category A on span [i,j). this is after --nt_prefix if any")
;
}
void print(std::ostream &o) const {
o<<"[";
if (identity_scfg)
o<<"Identity SCFG ";
if (features)
o<<"+Features ";
if (logprob_feat)
o<<logprob_feat_name<<"(logprob) ";
if (nt_span)
o<<"named-NTs ";
if (comma_nt)
o<<",N ";
o << "CFG output format";
o<<"]";
}
friend inline std::ostream &operator<<(std::ostream &o,CFGFormat const& me) {
me.print(o); return o;
}
void Validate() { }
template<class CFG>
void print_source_nt(std::ostream &o,CFG const&cfg,int id,int position=1) const {
o<<'[';
print_nt_name(o,cfg,id);
if (comma_nt) o<<','<<position;
o<<']';
}
template <class CFG>
void print_nt_name(std::ostream &o,CFG const& cfg,int id) const {
o<<nt_prefix;
if (nt_span)
cfg.print_nt_name(o,id);
else
o<<id;
}
template <class CFG>
void print_lhs(std::ostream &o,CFG const& cfg,int id) const {
o<<'[';
print_nt_name(o,cfg,id);
o<<']';
}
template <class CFG,class Iter>
void print_rhs(std::ostream &o,CFG const&cfg,Iter begin,Iter end) const {
o<<partsep;
int pos=0;
for (Iter i=begin;i!=end;++i) {
WordID w=*i;
if (i!=begin) o<<' ';
if (w>0) o << TD::Convert(w);
else print_source_nt(o,cfg,-w,++pos);
}
if (identity_scfg) {
o<<partsep;
int pos=0;
for (Iter i=begin;i!=end;++i) {
WordID w=*i;
if (i!=begin) o<<' ';
if (w>0) o << TD::Convert(w);
else o << '['<<++pos<<']';
}
}
}
void print_features(std::ostream &o,prob_t p,FeatureVector const& fv=FeatureVector()) const {
bool logp=(logprob_feat && p!=prob_t::One());
if (features || logp) {
o << partsep;
if (logp)
o << logprob_feat_name<<'='<<log(p)<<' ';
if (features)
o << fv;
}
}
//TODO: default to no nt names (nt_span=0)
void set_defaults() {
identity_scfg=false;
features=true;
logprob_feat=true;
comma_nt=true;
goal_nt_name="S";
logprob_feat_name="LogProb";
nt_prefix="";
partsep=" ||| ";
nt_span=true;
}
CFGFormat() {
set_defaults();
}
};
#endif
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