This single-attribute class represents a null value of a given nullable balcl::OptionType.
Declared in <balcl_optionvalue.h>
class OptionValue_NullOf;OptionValue uses this type to represent its state where there is a known type, but no value for it. Note that OptionType::e_VOID is not nullable, therefore not supported here. Note that: There is no swap member or namespace-level function declared (and defined) for this class on purpose, the general swap works fast for such a simple type.
| Name | Description |
|---|---|
OptionValue_NullOf [constructor] | Create an OptionValue_NullOf object with the specified nullable optionType. The behavior is undefined if optionType == OptionType::e_VOID. |
isType | Return true if TYPE corresponds to the type attribute, and false if it does not. |
print | Format this object to the specified output stream at the (absolute value of) the optionally specified indentation level and return a reference to stream. |
type | Return the option type of this object. |
operator BloombergLP::bslmf::NestedTraitDeclaration<OptionValue_NullOf, HasPrintMethod> | Nested trait declaration for bslmf::IsBitwiseMoveable. |
| Name | Description |
|---|---|
operator!= | Return true if the type of the specified lhs and rhs are not equal, and return false if they are not equal. |
operator== | Return true if the type of the specified lhs and rhs are equal, and return false if they are not equal. |