initial matador ng commit

2025-02-02 20:37:12 +01:00
parent 19de5714f4
commit ded3daceb3
378 changed files with 14913 additions and 13431 deletions
@@ -0,0 +1,90 @@
+#ifndef QUERY_VALUE_HPP
+#define QUERY_VALUE_HPP
+
+#include "matador/utils/basic_type_converter.hpp"
+#include "matador/utils/default_type_traits.hpp"
+#include "matador/utils/types.hpp"
+
+#include <optional>
+
+namespace matador::utils {
+
+namespace detail {
+template<typename Type>
+size_t determine_size(const Type &/*val*/)
+{
+  return 0;
+}
+size_t determine_size(const std::string &val);
+size_t determine_size(const char *val);
+size_t determine_size(const blob &val);
+
+}
+
+class value
+{
+public:
+  value() = default;
+  template<typename Type>
+  explicit value(Type value, size_t size = 0)
+  : value_(value)
+  , size_(size)
+  , type_(data_type_traits<Type>::type(size)) {}
+  explicit value(basic_type data_type, size_t size = 0);
+  value(const value &x) = default;
+  value& operator=(const value &x) = default;
+  template<typename Type>
+  value& operator=(Type val) {
+    value_ = val;
+    size_ = detail::determine_size(val);
+    type_ = data_type_traits<Type>::type(size_);
+    return *this;
+  }
+  value(value &&x) noexcept;
+  value& operator=(value &&x) noexcept;
+
+  template<class Type>
+  std::optional<Type> as() const {
+    if (std::holds_alternative<Type>(value_)) {
+      return std::get<Type>(value_);
+    }
+    const auto res = basic_type_converter<Type>::convert_value(value_);
+    if (!res.is_ok()) {
+      return std::nullopt;
+    }
+    return *res;
+  }
+
+  template<class Type>
+  std::optional<std::reference_wrapper<Type>> ref() {
+    if (std::holds_alternative<Type>(value_)) {
+      return std::get<Type>(value_);
+    }
+
+    return std::nullopt;
+  }
+
+  [[nodiscard]] std::string str() const;
+
+  [[nodiscard]] size_t size() const;
+  [[nodiscard]] basic_type type() const;
+
+  [[nodiscard]] bool is_integer() const;
+  [[nodiscard]] bool is_floating_point() const;
+  [[nodiscard]] bool is_bool() const;
+  [[nodiscard]] bool is_string() const;
+  [[nodiscard]] bool is_varchar() const;
+  [[nodiscard]] bool is_date() const;
+  [[nodiscard]] bool is_time() const;
+  [[nodiscard]] bool is_blob() const;
+  [[nodiscard]] bool is_null() const;
+
+private:
+  utils::database_type value_;
+  size_t size_{};
+  basic_type type_{basic_type::type_null};
+
+};
+
+}
+#endif //QUERY_VALUE_HPP