| 1 | // pgen2.h
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| 2 |
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| 3 | #ifndef CPP_PGEN2_H
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| 4 | #define CPP_PGEN2_H
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| 5 |
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| 6 | #include <vector>
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| 7 |
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| 8 | #include "_gen/frontend/syntax.asdl.h"
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| 9 | #include "mycpp/runtime.h"
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| 10 |
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| 11 | namespace grammar {
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| 12 |
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| 13 | typedef Tuple2<int, int> arc_t;
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| 14 | typedef Dict<int, int> first_t;
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| 15 | typedef List<List<arc_t*>*> states_t;
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| 16 | typedef Tuple2<states_t*, first_t*> dfa_t;
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| 17 |
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| 18 | class Grammar {
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| 19 | public:
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| 20 | Grammar();
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| 21 |
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| 22 | Dict<BigStr*, int>* symbol2number;
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| 23 | Dict<int, BigStr*>* number2symbol;
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| 24 | List<List<Tuple2<int, int>*>*>* states;
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| 25 | Dict<int, Tuple2<List<List<Tuple2<int, int>*>*>*, Dict<int, int>*>*>* dfas;
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| 26 | List<int>* labels;
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| 27 | Dict<BigStr*, int>* keywords;
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| 28 | Dict<int, int>* tokens;
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| 29 | Dict<BigStr*, int>* symbol2label;
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| 30 | int start;
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| 31 |
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| 32 | static constexpr ObjHeader obj_header() {
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| 33 | return ObjHeader::ClassFixed(field_mask(), sizeof(Grammar));
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| 34 | }
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| 35 |
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| 36 | static constexpr uint32_t field_mask() {
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| 37 | return maskbit(offsetof(Grammar, symbol2number)) |
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| 38 | maskbit(offsetof(Grammar, number2symbol)) |
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| 39 | maskbit(offsetof(Grammar, states)) |
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| 40 | maskbit(offsetof(Grammar, dfas)) |
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| 41 | maskbit(offsetof(Grammar, labels)) |
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| 42 | maskbit(offsetof(Grammar, keywords)) |
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| 43 | maskbit(offsetof(Grammar, tokens)) |
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| 44 | maskbit(offsetof(Grammar, symbol2label));
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| 45 | }
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| 46 |
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| 47 | DISALLOW_COPY_AND_ASSIGN(Grammar)
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| 48 | };
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| 49 |
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| 50 | } // namespace grammar
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| 51 |
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| 52 | namespace pnode {
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| 53 |
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| 54 | class PNode {
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| 55 | public:
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| 56 | PNode(int typ, syntax_asdl::Token* tok, List<PNode*>*);
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| 57 |
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| 58 | void AddChild(PNode* node);
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| 59 | PNode* GetChild(int i);
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| 60 | int NumChildren();
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| 61 |
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| 62 | int typ;
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| 63 | syntax_asdl::Token* tok;
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| 64 | std::vector<PNode*> children;
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| 65 | };
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| 66 |
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| 67 | class PNodeAllocator {
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| 68 | public:
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| 69 | PNodeAllocator();
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| 70 |
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| 71 | PNode* NewPNode(int typ, syntax_asdl::Token* tok);
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| 72 | void Clear();
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| 73 |
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| 74 | static constexpr ObjHeader obj_header() {
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| 75 | return ObjHeader::Class(HeapTag::Opaque, kZeroMask, sizeof(PNodeAllocator));
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| 76 | }
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| 77 |
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| 78 | private:
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| 79 | // We put this on the heap so we can call its destructor from `Clear()`...
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| 80 | std::vector<PNode>* arena_;
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| 81 | };
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| 82 |
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| 83 | } // namespace pnode
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| 84 |
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| 85 | #endif // CPP_PGEN2_H
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