json_string_builder.h

#ifndef SIMDJSON_GENERIC_STRING_BUILDER_H
 
#ifndef SIMDJSON_CONDITIONAL_INCLUDE
#define SIMDJSON_GENERIC_STRING_BUILDER_H
#include "simdjson/generic/implementation_simdjson_result_base.h"
#endif // SIMDJSON_CONDITIONAL_INCLUDE
 
namespace simdjson {
 
 
#if SIMDJSON_SUPPORTS_CONCEPTS
 
namespace SIMDJSON_IMPLEMENTATION {
namespace builder {
  class string_builder;
}}
 
template <typename T, typename = void>
struct has_custom_serialization : std::false_type {};
 
inline constexpr struct serialize_tag {
  template <typename T>
  constexpr void operator()(SIMDJSON_IMPLEMENTATION::builder::string_builder& b, T&& obj) const{
    return tag_invoke(*this, b, std::forward<T>(obj));
  }
 
 
} serialize{};
template <typename T>
struct has_custom_serialization<T, std::void_t<
    decltype(tag_invoke(serialize, std::declval<SIMDJSON_IMPLEMENTATION::builder::string_builder&>(), std::declval<T&>()))
>> : std::true_type {};
 
template <typename T>
constexpr bool require_custom_serialization = has_custom_serialization<T>::value;
#else
struct has_custom_serialization : std::false_type {};
#endif // SIMDJSON_SUPPORTS_CONCEPTS
 
namespace SIMDJSON_IMPLEMENTATION {
namespace builder {
class string_builder {
public:
  simdjson_inline string_builder(size_t initial_capacity = DEFAULT_INITIAL_CAPACITY);
 
  static constexpr size_t DEFAULT_INITIAL_CAPACITY = 1024;
 
  template<typename number_type,
    typename = typename std::enable_if<std::is_arithmetic<number_type>::value>::type>
  simdjson_inline void append(number_type v) noexcept;
 
  simdjson_inline void append(char c)  noexcept;
 
  simdjson_inline void append_null()  noexcept;
 
  simdjson_inline void clear()  noexcept;
 
  simdjson_inline void escape_and_append(std::string_view input)  noexcept;
 
  simdjson_inline void escape_and_append_with_quotes(std::string_view input)  noexcept;
#if SIMDJSON_SUPPORTS_CONCEPTS
  template<constevalutil::fixed_string key>
  simdjson_inline void escape_and_append_with_quotes()  noexcept;
#endif
  simdjson_inline void escape_and_append_with_quotes(char input)  noexcept;
 
   simdjson_inline void escape_and_append_with_quotes(const char* input)  noexcept;
 
  simdjson_inline void append_raw(const char *c)  noexcept;
 
  simdjson_inline void start_object()  noexcept;
 
  simdjson_inline void end_object()  noexcept;
 
  simdjson_inline void start_array()  noexcept;
 
  simdjson_inline void end_array()  noexcept;
 
  simdjson_inline void append_comma()  noexcept;
 
  simdjson_inline void append_colon()  noexcept;
 
  template<typename key_type, typename value_type>
  simdjson_inline void append_key_value(key_type key, value_type value) noexcept;
#if SIMDJSON_SUPPORTS_CONCEPTS
  template<constevalutil::fixed_string key, typename value_type>
  simdjson_inline void append_key_value(value_type value) noexcept;
 
  // Support for optional types (std::optional, etc.)
  template <concepts::optional_type T>
  requires(!require_custom_serialization<T>)
  simdjson_inline void append(const T &opt);
 
  template <typename T>
  requires(require_custom_serialization<T>)
  simdjson_inline void append(T &&val);
 
  // Support for string-like types
  template <typename T>
  requires(std::is_convertible<T, std::string_view>::value ||
  std::is_same<T, const char*>::value )
  simdjson_inline void append(const T &value);
#endif
#if SIMDJSON_SUPPORTS_RANGES && SIMDJSON_SUPPORTS_CONCEPTS
  // Support for range-based appending (std::ranges::view, etc.)
  template <std::ranges::range R>
requires (!std::is_convertible<R, std::string_view>::value && !require_custom_serialization<R>)
  simdjson_inline void append(const R &range) noexcept;
#endif
  simdjson_inline void append_raw(std::string_view input)  noexcept;
 
  simdjson_inline void append_raw(const char *str, size_t len) noexcept;
#if SIMDJSON_EXCEPTIONS
  simdjson_inline operator std::string() const noexcept(false);
 
  simdjson_inline operator std::string_view() const noexcept(false) simdjson_lifetime_bound;
#endif
 
  simdjson_inline simdjson_result<std::string_view> view() const noexcept;
 
  simdjson_inline simdjson_result<const char *> c_str() noexcept;
 
  simdjson_inline bool validate_unicode() const noexcept;
 
  simdjson_inline size_t size() const noexcept;
 
private:
  simdjson_inline bool capacity_check(size_t upcoming_bytes);
 
  simdjson_inline void grow_buffer(size_t desired_capacity);
 
  simdjson_inline void set_valid(bool valid) noexcept;
 
  std::unique_ptr<char[]> buffer{};
  size_t position{0};
  size_t capacity{0};
  bool is_valid{true};
};
 
 
 
}
}
 
 
#if !SIMDJSON_STATIC_REFLECTION
// fallback implementation until we have static reflection
template <class Z>
simdjson_warn_unused simdjson_result<std::string> to_json(const Z &z, size_t initial_capacity = simdjson::SIMDJSON_IMPLEMENTATION::builder::string_builder::DEFAULT_INITIAL_CAPACITY) {
  simdjson::SIMDJSON_IMPLEMENTATION::builder::string_builder b(initial_capacity);
  b.append(z);
  std::string_view s;
  auto e = b.view().get(s);
  if(e) { return e; }
  return std::string(s);
}
template <class Z>
simdjson_warn_unused error_code to_json(const Z &z, std::string &s, size_t initial_capacity = simdjson::SIMDJSON_IMPLEMENTATION::builder::string_builder::DEFAULT_INITIAL_CAPACITY) {
  simdjson::SIMDJSON_IMPLEMENTATION::builder::string_builder b(initial_capacity);
  b.append(z);
  std::string_view sv;
  auto e = b.view().get(sv);
  if(e) { return e; }
  s.assign(sv.data(), sv.size());
  return simdjson::SUCCESS;
}
#endif
 
#if SIMDJSON_SUPPORTS_CONCEPTS
#endif // SIMDJSON_SUPPORTS_CONCEPTS
 
} // namespace simdjson
 
#endif // SIMDJSON_GENERIC_STRING_BUILDER_H