diff options
Diffstat (limited to 'decoder')
| -rw-r--r-- | decoder/rule_lexer.ll | 42 | ||||
| -rw-r--r-- | decoder/tree2string_translator.cc | 87 | ||||
| -rw-r--r-- | decoder/tree_fragment.h | 59 |
3 files changed, 176 insertions, 12 deletions
diff --git a/decoder/rule_lexer.ll b/decoder/rule_lexer.ll index c6a85919..05963d05 100644 --- a/decoder/rule_lexer.ll +++ b/decoder/rule_lexer.ll @@ -12,6 +12,7 @@ #include "fdict.h" #include "trule.h" #include "verbose.h" +#include "tree_fragment.h" int lex_line = 0; std::istream* scfglex_stream = NULL; @@ -51,6 +52,7 @@ int scfglex_src_nts[MAX_ARITY]; // float scfglex_nt_size_vars[MAX_ARITY]; std::stack<TRulePtr> ctf_rule_stack; unsigned int ctf_level = 0; +boost::shared_ptr<cdec::TreeFragment> scfglex_tree; #define MAX_ALS 2000 AlignmentPoint scfglex_als[MAX_ALS]; @@ -120,7 +122,7 @@ void check_and_update_ctf_stack(const TRulePtr& rp) { REAL [\-+]?[0-9]+(\.[0-9]*([eE][-+]*[0-9]+)?)?|inf|[\-+]inf NT [^\t \[\],]+ -%x LHS_END SRC TRG FEATS FEATVAL ALIGNS +%x LHS_END SRC TRG FEATS FEATVAL ALIGNS TREE %% <INITIAL>[ \t] { @@ -205,7 +207,13 @@ NT [^\t \[\],]+ ++scfglex_src_rhs_size; } <SRC>[ \t]+ { ; } - +<TREE>[^|\n]+ { + if (yyleng > 0) { + int len = yyleng; + while(len > 1 && yytext[len - 1] != ')') { --len; } + scfglex_tree.reset(new cdec::TreeFragment(std::string(yytext, len), true)); + } + } <TRG>\|\|\| { BEGIN(FEATS); } @@ -216,7 +224,7 @@ NT [^\t \[\],]+ } <TRG>[ \t]+ { ; } -<TRG,FEATS,ALIGNS>\n { +<TRG,FEATS,ALIGNS,TREE>\n { if (scfglex_src_arity != scfglex_trg_arity) { std::cerr << "Grammar " << scfglex_fname << " line " << lex_line << ": LHS and RHS arity mismatch!\n"; abort(); @@ -224,18 +232,25 @@ NT [^\t \[\],]+ // const bool ignore_grammar_features = false; // if (ignore_grammar_features) scfglex_num_feats = 0; TRulePtr rp(new TRule(scfglex_lhs, scfglex_src_rhs, scfglex_src_rhs_size, scfglex_trg_rhs, scfglex_trg_rhs_size, scfglex_feat_ids, scfglex_feat_vals, scfglex_num_feats, scfglex_src_arity, scfglex_als, scfglex_num_als)); - check_and_update_ctf_stack(rp); - TRulePtr coarse_rp = ((ctf_level == 0) ? TRulePtr() : ctf_rule_stack.top()); + if (scfglex_tree) { + if (scfglex_tree->frontier_sites != rp->Arity()) { + std::cerr << "Arity mismatch with tree annotation: " << *scfglex_tree << std::endl; + abort(); + } + rp->tree_structure.swap(scfglex_tree); + } + check_and_update_ctf_stack(rp); + TRulePtr coarse_rp = ((ctf_level == 0) ? TRulePtr() : ctf_rule_stack.top()); rule_callback(rp, ctf_level, coarse_rp, rule_callback_extra); - ctf_rule_stack.push(rp); + ctf_rule_stack.push(rp); // std::cerr << rp->AsString() << std::endl; num_rules++; - lex_line++; - if (!SILENT) { - if (num_rules % 50000 == 0) { std::cerr << '.' << std::flush; fl = true; } - if (num_rules % 2000000 == 0) { std::cerr << " [" << num_rules << "]\n"; fl = false; } - } - ctf_level = 0; + lex_line++; + if (!SILENT) { + if (num_rules % 50000 == 0) { std::cerr << '.' << std::flush; fl = true; } + if (num_rules % 2000000 == 0) { std::cerr << " [" << num_rules << "]\n"; fl = false; } + } + ctf_level = 0; BEGIN(INITIAL); } @@ -253,6 +268,9 @@ NT [^\t \[\],]+ <FEATS>\|\|\| { BEGIN(ALIGNS); } +<ALIGNS>\|\|\|[ \t]* { + BEGIN(TREE); + } <FEATVAL>{REAL} { scfglex_feat_vals[scfglex_num_feats] = strtod(yytext, NULL); ++scfglex_num_feats; diff --git a/decoder/tree2string_translator.cc b/decoder/tree2string_translator.cc new file mode 100644 index 00000000..4ccc54e2 --- /dev/null +++ b/decoder/tree2string_translator.cc @@ -0,0 +1,87 @@ +#include <algorithm> +#include <vector> +#include <boost/functional/hash.hpp> +#include <unordered_map> +#include "tree_fragment.h" +#include "translator.h" +#include "hg.h" +#include "sentence_metadata.h" +#include "filelib.h" +#include "stringlib.h" +#include "tdict.h" +#include "verbose.h" + +using namespace std; + +// root: S +// A implication: (S [A] *INCOMPLETE* +// B implication: (S [A] [B] *INCOMPLETE* +// *0* implication: (S _[A] [B]) +// a implication: (S (A a *INCOMPLETE* [B]) +// a implication: (S (A a a *INCOMPLETE* [B]) +// *0* implication: (S (A a a) _[B]) +// D implication: (S (A a a) (B [D] *INCOMPLETE*) +// *0* implication: (S (A a a) (B _[D])) +// d implication: (S (A a a) (B (D d *INCOMPLETE*)) +// *0* implication: (S (A a a) (B (D d))) +// --there are no further outgoing links possible-- + +// root: S +// A implication: (S [A] *INCOMPLETE* +// B implication: (S [A] [B] *INCOMPLETE* +// *0* implication: (S _[A] [B]) +// *0* implication: (S [A] _[B]) +// b implication: (S [A] (B b *INCOMPLETE*)) +struct Tree2StringGrammarNode { + unordered_map<unsigned, Tree2StringGrammarNode> next; + string rules; +}; + +void ReadTree2StringGrammar(istream* in, unordered_map<unsigned, Tree2StringGrammarNode>* proots) { + unordered_map<unsigned, Tree2StringGrammarNode>& roots = *proots; + string line; + while(getline(*in, line)) { + size_t pos = line.find("|||"); + assert(pos != string::npos); + assert(pos > 3); + if (line[pos - 1] == ' ') --pos; + cdec::TreeFragment rule_src(line.substr(0, pos), true); + } +} + +struct Tree2StringTranslatorImpl { + unordered_map<unsigned, Tree2StringGrammarNode> roots; // root['S'] gives rule network for S rules + Tree2StringTranslatorImpl(const boost::program_options::variables_map& conf) { + ReadFile rf(conf["grammar"].as<vector<string>>()[0]); + ReadTree2StringGrammar(rf.stream(), &roots); + } + bool Translate(const string& input, + SentenceMetadata* smeta, + const vector<double>& weights, + Hypergraph* minus_lm_forest) { + cdec::TreeFragment input_tree(input, false); + cerr << "Tree2StringTranslatorImpl: please implement this!\n"; + return false; + } +}; + +Tree2StringTranslator::Tree2StringTranslator(const boost::program_options::variables_map& conf) : + pimpl_(new Tree2StringTranslatorImpl(conf)) {} + +bool Tree2StringTranslator::TranslateImpl(const string& input, + SentenceMetadata* smeta, + const vector<double>& weights, + Hypergraph* minus_lm_forest) { + return pimpl_->Translate(input, smeta, weights, minus_lm_forest); +} + +void Tree2StringTranslator::ProcessMarkupHintsImpl(const map<string, string>& kv) { +} + +void Tree2StringTranslator::SentenceCompleteImpl() { +} + +std::string Tree2StringTranslator::GetDecoderType() const { + return "tree2string"; +} + diff --git a/decoder/tree_fragment.h b/decoder/tree_fragment.h new file mode 100644 index 00000000..83cd1c1e --- /dev/null +++ b/decoder/tree_fragment.h @@ -0,0 +1,59 @@ +#ifndef TREE_FRAGMENT +#define TREE_FRAGMENT + +#include <iostream> +#include <vector> +#include <string> + +#include "tdict.h" + +namespace cdec { + +static const unsigned NT_BIT = 0x40000000u; +static const unsigned FRONTIER_BIT = 0x80000000u; +static const unsigned ALL_MASK = 0x0FFFFFFFu; + +inline bool IsInternalNT(unsigned x) { + return (x & NT_BIT); +} + +inline bool IsFrontier(unsigned x) { + return (x & FRONTIER_BIT); +} + +struct TreeFragmentProduction { + TreeFragmentProduction() {} + TreeFragmentProduction(int nttype, const std::vector<unsigned>& r) : lhs(nttype), rhs(r) {} + unsigned lhs; + std::vector<unsigned> rhs; +}; + +// this data structure represents a tree or forest +// productions can have mixtures of terminals and nonterminal symbols and non-terminal frontier sites +class TreeFragment { + public: + TreeFragment() : frontier_sites(), terminals() {} + // (S (NP a (X b) c d) (VP (V foo) (NP (NN bar)))) + explicit TreeFragment(const std::string& tree, bool allow_frontier_sites = false); + void DebugRec(unsigned cur, std::ostream* out) const; + private: + // cp is the character index in the tree + // np keeps track of the nodes (nonterminals) that have been built + // symp keeps track of the terminal symbols that have been built + void ParseRec(const std::string& tree, bool afs, unsigned cp, unsigned symp, unsigned np, unsigned* pcp, unsigned* psymp, unsigned* pnp); + public: + unsigned root; + unsigned char frontier_sites; + unsigned short terminals; + + std::vector<TreeFragmentProduction> nodes; +}; + +inline std::ostream& operator<<(std::ostream& os, const TreeFragment& x) { + x.DebugRec(x.nodes.size() - 1, &os); + return os; +} + +} + +#endif |