tree-sitter/src/compiler/rules/symbol.h

#ifndef COMPILER_RULES_SYMBOL_H_
#define COMPILER_RULES_SYMBOL_H_

#include <string>
#include "compiler/rules/rule.h"

namespace tree_sitter  {
    namespace rules {
        typedef enum {
            SymbolOptionToken = 1 << 0,
            SymbolOptionAuxiliary = 1 << 1,
        } SymbolOption;

        class Symbol : public Rule {
        public:
            explicit Symbol(int index);
            Symbol(int index, SymbolOption options);

            bool operator==(const Symbol &other) const;
            bool operator==(const Rule &other) const;

            size_t hash_code() const;
            rule_ptr copy() const;
            std::string to_string() const;
            void accept(Visitor *visitor) const;

            bool operator<(const Symbol &other) const;
            bool is_token() const;
            bool is_built_in() const;
            bool is_auxiliary() const;

            int index;
            SymbolOption options;
        };
    }
}

namespace std {
    template<>
    struct hash<tree_sitter::rules::Symbol> {
        size_t operator()(const tree_sitter::rules::Symbol &rule) const {
            return rule.hash_code();
        }
    };
}

#endif  // COMPILER_RULES_SYMBOL_H_