1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
#include "grammar.h"
#include <algorithm>
#include <utility>
#include <map>
#include "filelib.h"
#include "tdict.h"
using namespace std;
const vector<TRulePtr> Grammar::NO_RULES;
RuleBin::~RuleBin() {}
GrammarIter::~GrammarIter() {}
Grammar::~Grammar() {}
bool Grammar::HasRuleForSpan(int i, int j, int distance) const {
(void) i;
(void) j;
(void) distance;
return true; // always true by default
}
struct TextRuleBin : public RuleBin {
int GetNumRules() const {
return rules_.size();
}
TRulePtr GetIthRule(int i) const {
return rules_[i];
}
void AddRule(TRulePtr t) {
rules_.push_back(t);
}
int Arity() const {
return rules_.front()->Arity();
}
void Dump() const {
for (int i = 0; i < rules_.size(); ++i)
cerr << rules_[i]->AsString() << endl;
}
private:
vector<TRulePtr> rules_;
};
struct TextGrammarNode : public GrammarIter {
TextGrammarNode() : rb_(NULL) {}
~TextGrammarNode() {
delete rb_;
}
const GrammarIter* Extend(int symbol) const {
map<WordID, TextGrammarNode>::const_iterator i = tree_.find(symbol);
if (i == tree_.end()) return NULL;
return &i->second;
}
const RuleBin* GetRules() const {
if (rb_) {
//rb_->Dump();
}
return rb_;
}
map<WordID, TextGrammarNode> tree_;
TextRuleBin* rb_;
};
struct TGImpl {
TextGrammarNode root_;
};
TextGrammar::TextGrammar() : max_span_(10), pimpl_(new TGImpl) {}
TextGrammar::TextGrammar(const string& file) :
max_span_(10),
pimpl_(new TGImpl) {
ReadFromFile(file);
}
const GrammarIter* TextGrammar::GetRoot() const {
return &pimpl_->root_;
}
void TextGrammar::AddRule(const TRulePtr& rule) {
if (rule->IsUnary()) {
rhs2unaries_[rule->f().front()].push_back(rule);
unaries_.push_back(rule);
} else {
TextGrammarNode* cur = &pimpl_->root_;
for (int i = 0; i < rule->f_.size(); ++i)
cur = &cur->tree_[rule->f_[i]];
if (cur->rb_ == NULL)
cur->rb_ = new TextRuleBin;
cur->rb_->AddRule(rule);
}
}
void TextGrammar::ReadFromFile(const string& filename) {
ReadFile in(filename);
istream& in_file = *in.stream();
assert(in_file);
long long int rule_count = 0;
bool fl = false;
while(in_file) {
string line;
getline(in_file, line);
if (line.empty()) continue;
++rule_count;
if (rule_count % 50000 == 0) { cerr << '.' << flush; fl = true; }
if (rule_count % 2000000 == 0) { cerr << " [" << rule_count << "]\n"; fl = false; }
TRulePtr rule(TRule::CreateRuleSynchronous(line));
if (rule) {
AddRule(rule);
} else {
if (fl) { cerr << endl; }
cerr << "Skipping badly formatted rule in line " << rule_count << " of " << filename << endl;
fl = false;
}
}
if (fl) cerr << endl;
cerr << " " << rule_count << " rules read.\n";
}
bool TextGrammar::HasRuleForSpan(int i, int j, int distance) const {
return (max_span_ >= distance);
}
GlueGrammar::GlueGrammar(const string& file) : TextGrammar(file) {}
GlueGrammar::GlueGrammar(const string& goal_nt, const string& default_nt) {
TRulePtr stop_glue(new TRule("[" + goal_nt + "] ||| [" + default_nt + ",1] ||| [" + default_nt + ",1]"));
TRulePtr glue(new TRule("[" + goal_nt + "] ||| [" + goal_nt + ",1] ["
+ default_nt + ",2] ||| [" + goal_nt + ",1] [" + default_nt + ",2] ||| Glue=1"));
AddRule(stop_glue);
AddRule(glue);
//cerr << "GLUE: " << stop_glue->AsString() << endl;
//cerr << "GLUE: " << glue->AsString() << endl;
}
bool GlueGrammar::HasRuleForSpan(int i, int j, int distance) const {
(void) j;
return (i == 0);
}
PassThroughGrammar::PassThroughGrammar(const Lattice& input, const string& cat) :
has_rule_(input.size() + 1) {
for (int i = 0; i < input.size(); ++i) {
const vector<LatticeArc>& alts = input[i];
for (int k = 0; k < alts.size(); ++k) {
const int j = alts[k].dist2next + i;
has_rule_[i].insert(j);
const string& src = TD::Convert(alts[k].label);
TRulePtr pt(new TRule("[" + cat + "] ||| " + src + " ||| " + src + " ||| PassThrough=1"));
AddRule(pt);
// cerr << "PT: " << pt->AsString() << endl;
}
}
}
bool PassThroughGrammar::HasRuleForSpan(int i, int j, int distance) const {
const set<int>& hr = has_rule_[i];
if (i == j) { return !hr.empty(); }
return (hr.find(j) != hr.end());
}
|
