46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
#include "compiler/rules/metadata.h"
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#include <string>
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#include <map>
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#include "compiler/rules/visitor.h"
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namespace tree_sitter {
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namespace rules {
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using std::hash;
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using std::make_shared;
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using std::map;
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Metadata::Metadata(rule_ptr rule, map<MetadataKey, int> values)
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: rule(rule), value(values) {}
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bool Metadata::operator==(const Rule &rule) const {
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auto other = dynamic_cast<const Metadata *>(&rule);
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return other && other->value == value && other->rule->operator==(*this->rule);
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}
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size_t Metadata::hash_code() const {
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size_t result = hash<size_t>()(value.size());
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for (auto &pair : value) {
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result ^= hash<int>()(pair.first);
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result ^= hash<int>()(pair.second);
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}
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return result;
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}
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rule_ptr Metadata::copy() const {
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return make_shared<Metadata>(rule->copy(), value);
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}
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int Metadata::value_for(MetadataKey key) const {
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auto pair = value.find(key);
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return (pair != value.end()) ? pair->second : 0;
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}
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std::string Metadata::to_string() const {
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return "(metadata " + rule->to_string() + ")";
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}
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void Metadata::accept(Visitor *visitor) const { visitor->visit(this); }
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} // namespace rules
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} // namespace tree_sitter
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