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#include "trule.h"
#include <sstream>
#include "stringlib.h"
#include "tdict.h"
#include "rule_lexer.h"
using namespace std;
ostream &operator<<(ostream &o,TRule const& r) {
return o<<r.AsString(true);
}
bool TRule::IsGoal() const {
static const int kGOAL(TD::Convert("Goal") * -1); // this will happen once, and after static init of trule.cc static dict.
return GetLHS() == kGOAL;
}
TRule* TRule::CreateRuleSynchronous(const string& rule) {
TRule* res = new TRule;
if (res->ReadFromString(rule)) return res;
cerr << "[ERROR] Failed to creating rule from: " << rule << endl;
delete res;
return NULL;
}
TRule* TRule::CreateRulePhrasetable(const string& rule) {
TRule* res = new TRule("[X] ||| " + rule);
if (res->Arity() != 0) {
cerr << "Phrasetable rules should have arity 0:\n " << rule << endl;
delete res;
return NULL;
}
return res;
}
TRule* TRule::CreateRuleMonolingual(const string& rule) {
return new TRule(rule, true);
}
namespace {
// callback for single rule lexer
int n_assigned=0;
void assign_trule(const TRulePtr& new_rule, const unsigned int ctf_level, const TRulePtr& coarse_rule, void* extra) {
(void) ctf_level;
(void) coarse_rule;
*static_cast<TRule*>(extra) = *new_rule;
++n_assigned;
}
}
bool TRule::ReadFromString(const string& line, bool mono) {
n_assigned = 0;
//cerr << "LINE: " << line << " -- mono=" << mono << endl;
RuleLexer::ReadRule(line + '\n', assign_trule, mono, this);
if (n_assigned > 1)
cerr<<"\nWARNING: more than one rule parsed from multi-line string; kept last: "<<line<<".\n";
return n_assigned;
}
void TRule::ComputeArity() {
int min = 1;
for (vector<WordID>::const_iterator i = e_.begin(); i != e_.end(); ++i)
if (*i < min) min = *i;
arity_ = 1 - min;
}
string TRule::AsString(bool verbose) const {
ostringstream os;
int idx = 0;
if (lhs_) {
os << '[' << TD::Convert(lhs_ * -1) << "] |||";
} else { os << "NOLHS |||"; }
for (unsigned i = 0; i < f_.size(); ++i) {
const WordID& w = f_[i];
if (w < 0) {
int wi = w * -1;
++idx;
os << " [" << TD::Convert(wi) << ']';
} else {
os << ' ' << TD::Convert(w);
}
}
os << " ||| ";
for (unsigned i =0; i<e_.size(); ++i) {
if (i) os << ' ';
const WordID& w = e_[i];
if (w < 1)
os << '[' << (1-w) << ']';
else
os << TD::Convert(w);
}
if (!scores_.empty() && verbose) {
os << " ||| " << scores_;
if (!a_.empty()) {
os << " |||";
for (unsigned i = 0; i < a_.size(); ++i)
os << ' ' << a_[i];
}
}
return os.str();
}
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