tree-sitter/src/compiler/rules/seq.cpp

#include "seq.h"
#include "visitor.h"
#include "blank.h"

namespace tree_sitter {
    using std::make_shared;
    using std::string;
    using std::vector;

    namespace rules {
        Seq::Seq(rule_ptr left, rule_ptr right) : left(left), right(right) {};

        rule_ptr Seq::Build(const std::vector<rule_ptr> &rules) {
            rule_ptr result = make_shared<Blank>();
            for (auto &rule : rules)
                result = (typeid(*result) != typeid(Blank)) ? make_shared<Seq>(result, rule) : rule;
            return result;
        }

        bool Seq::operator==(const Rule &rule) const {
            const Seq *other = dynamic_cast<const Seq *>(&rule);
            return other && (*other->left == *left) && (*other->right == *right);
        }

        size_t Seq::hash_code() const {
            return left->hash_code() ^ right->hash_code();
        }

        rule_ptr Seq::copy() const {
            return std::make_shared<Seq>(*this);
        }

        string Seq::to_string() const {
            return string("#<seq ") + left->to_string() + " " + right->to_string() + ">";
        }

        void Seq::accept(Visitor &visitor) const {
            visitor.visit(this);
        }
    }
}