ljson::value class

Constructors, destructors, conversion operators

template <is_allowed_value_type val_type>

value(const val_type& val) noexcept

constructor for ljson::value

value(const value& other)

copy constructor for ljson::value

value(const value&& other)

move constructor for ljson::value

value() noexcept

constructor which sets an empty ljson::value

Public functions

auto as_boolean() →  bool

cast ljson::value into a boolean if it is holding a json boolean (bool)

auto as_double() →  double

cast ljson::value into a number if it is holding a json number (double)

auto as_integer() →  int64_t

cast ljson::value into a number if it is holding a json number (int64_t)

auto as_null() →  null_type

cast ljson::value into a null if it is holding a json null (ljson::null_type)

auto as_number() →  double

cast ljson::value into a number if it is holding a json number (double or int64_t)

auto as_string() →  std::string

cast ljson::value into a string if it is holding a json string (std::string)

auto is_boolean() const →  bool noexcept

checks if ljson::value is holding json boolean (bool)

auto is_double() const →  bool noexcept

checks if ljson::value is holding json number (double)

auto is_empty() const →  bool noexcept

checks if ljson::value is not holding json value (ljson::monostate)

auto is_integer() const →  bool noexcept

checks if ljson::value is holding json number (int64_t)

auto is_null() const →  bool noexcept

checks if ljson::value is holding json null (ljson::null_type)

auto is_number() const →  bool noexcept

checks if ljson::value is holding json number (double or int64_t)

auto is_string() const →  bool noexcept

checks if ljson::value is holding json string (std::string)

auto operator=(const value& other) →  value&

copy assignment for ljson::value

auto operator=(const value&& other) →  value&

move assignment for ljson::value

template <is_allowed_value_type val_type>

void set_value_type(const val_type& val) noexcept

sets the value and type of ljson::value

auto set_value_type(const std::string& val, value_type type) →  expected<monostate, error>

sets the value and type of ljson::value

auto stringify() const →  std::string noexcept

cast the json value into a std::string

auto try_as_boolean() →  expected<bool, error> noexcept

cast ljson::value into a bool if it is holding a json boolean (bool)

auto try_as_double() →  expected<double, error> noexcept

cast ljson::value into a double if it is holding a json number (double)

auto try_as_integer() →  expected<int64_t, error> noexcept

cast ljson::value into a int64_t if it is holding a json number (int64_t)

auto try_as_null() →  expected<null_type, error> noexcept

cast ljson::value into a ljson::null_type if it is holding a json null (ljson::null_type)

auto try_as_number() →  expected<double, error> noexcept

cast ljson::value into a double if it is holding a json number (double or int64_t)

auto try_as_string() →  expected<std::string, error> noexcept

cast ljson::value into a std::string if it is holding a json string (std::string)

auto type() const →  ljson::value_type noexcept

gets the type of the stored json value

auto type_name() const →  std::string noexcept

gets string representation of ljson::value_type of the internal value

Function documentation

ljson::expected<std::string, error> string = value.try_as_string();
if (not string)
{
 // handle error
 std::println("{}", string.error().message());
}
else
{
 // success
 std::string string_value = string.value();
}