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#ifndef EARLEY_COMPOSER_H_
#define EARLEY_COMPOSER_H_
#include <iostream>
class EarleyComposerImpl;
class FSTNode;
class Hypergraph;
class EarleyComposer {
public:
~EarleyComposer();
EarleyComposer(const FSTNode* phrasetable_root);
bool Compose(const Hypergraph& src_forest, Hypergraph* trg_forest);
// reads the grammar from a file. There must be a single top-level
// S -> X rule. Anything else is possible. Format is:
// [S] ||| [SS,1]
// [SS] ||| [NP,1] [VP,2] ||| Feature1=0.2 Feature2=-2.3
// [SS] ||| [VP,1] [NP,2] ||| Feature1=0.8
// [NP] ||| [DET,1] [N,2] ||| Feature3=2
// ...
bool Compose(std::istream* grammar_file, Hypergraph* trg_forest);
private:
EarleyComposerImpl* pimpl_;
};
#endif
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