104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
#ifndef COMPILER_PARSE_TABLE_H_
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#define COMPILER_PARSE_TABLE_H_
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#include <map>
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#include <set>
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#include <utility>
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#include <vector>
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#include "compiler/lex_table.h"
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#include "compiler/rules/symbol.h"
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#include "compiler/rules/metadata.h"
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#include "compiler/precedence_range.h"
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#include "compiler/syntax_grammar.h"
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namespace tree_sitter {
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typedef uint64_t ParseStateId;
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enum ParseActionType {
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ParseActionTypeError,
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ParseActionTypeShift,
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ParseActionTypeReduce,
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ParseActionTypeAccept,
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ParseActionTypeRecover,
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};
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class ParseAction {
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ParseAction(ParseActionType type, ParseStateId state_index,
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rules::Symbol symbol, size_t consumed_symbol_count,
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PrecedenceRange range, rules::Associativity, const Production *);
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public:
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ParseAction();
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static ParseAction Accept();
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static ParseAction Error();
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static ParseAction Shift(ParseStateId state_index, PrecedenceRange precedence);
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static ParseAction Recover(ParseStateId state_index);
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static ParseAction Reduce(rules::Symbol symbol, size_t consumed_symbol_count,
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int precedence, rules::Associativity,
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const Production &);
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static ParseAction ShiftExtra();
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static ParseAction ReduceExtra(rules::Symbol symbol);
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bool operator==(const ParseAction &) const;
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bool operator<(const ParseAction &) const;
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ParseActionType type;
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bool extra;
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bool fragile;
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rules::Symbol symbol;
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ParseStateId state_index;
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size_t consumed_symbol_count;
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PrecedenceRange precedence_range;
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rules::Associativity associativity;
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const Production *production;
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};
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struct ParseTableEntry {
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std::vector<ParseAction> actions;
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bool reusable;
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bool depends_on_lookahead;
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ParseTableEntry();
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ParseTableEntry(const std::vector<ParseAction> &, bool, bool);
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bool operator==(const ParseTableEntry &other) const;
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inline bool operator!=(const ParseTableEntry &other) const {
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return !operator==(other);
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}
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};
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class ParseState {
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public:
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ParseState();
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std::set<rules::Symbol> expected_inputs() const;
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bool operator==(const ParseState &) const;
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bool merge(const ParseState &);
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void each_advance_action(std::function<void(ParseAction *)>);
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std::map<rules::Symbol, ParseTableEntry> entries;
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LexStateId lex_state_id;
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};
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struct ParseTableSymbolMetadata {
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bool extra;
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bool structural;
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std::set<rules::Symbol> compatible_symbols;
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};
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class ParseTable {
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public:
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std::set<rules::Symbol> all_symbols() const;
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ParseStateId add_state();
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ParseAction &set_action(ParseStateId state_id, rules::Symbol symbol,
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ParseAction action);
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ParseAction &add_action(ParseStateId state_id, rules::Symbol symbol,
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ParseAction action);
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bool merge_state(size_t i, size_t j);
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std::vector<ParseState> states;
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std::map<rules::Symbol, ParseTableSymbolMetadata> symbols;
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};
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} // namespace tree_sitter
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#endif // COMPILER_PARSE_TABLE_H_
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