Exit Zen
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<<ref_string>> uses `char` as its character type,
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In settings where exceptions cannot be used, an overload of `value::to_number` accepting {ref_error_code} can be used instead with identical semantics to its throwing counterpart:
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If your users are external, they and not you decide whether throwing exceptions is acceptable. So, in this case it is better to use non-throwing `tag_invoke` overloads. In addition, for customising conversion of composite types, always use `tag_invoke` overload with 2 context parameters. This will allow correct context propagation to elements of composites. This will also allow propagation of exceptions from conversion of elements.
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Conversions for Third-Party Types
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It exposes both a sequence API and a tuple API. But converting from <<ref_value>> to `user_ns::ip_address` would not be able to use implementation for sequences, since those are constructed empty and then populated one element at a time, while `ip_address` has a fixed size of 4. The tuple conversion would fit, though. The only problem is that <<ref_is_tuple_like>> has a lower priority than <<ref_is_sequence_like>>. In order to circumvent this, the user only needs to specialize <<ref_is_sequence_like>> to not match `ip_address`.
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If you need to combine incremental parsing with direct parsing, you can resort to <<ref_parser_for>>. `parser_for<T>` is an instantiation of <<ref_basic_parser>> that parses into an object of type `T`, and is what <<ref_parse_into>> uses under the hood.
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The order of insertions is preserved, as long as there are no removals.
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For the class `ip_address` from the section <<custom_conversions>> this overload may look like this:
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Forward declarations of contextual conversions are done very similarly:
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``` void tag_invoke( const value_from_tag&, value& jv, ip_address const& addr ) { jv = array{ b[0], b[1], b[2], b[3] }; } ```
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**number**: An integral or floating point value.
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Similar to its standard library counterpart, elements may be accessed directly by their 0-based index with bounds checking using <<ref_array_at>>, or without bounds checking using <<ref_array_operator_lb_rb>>:
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<<default_memory_resource,default resource>>, an implementation-defined instance which always uses the equivalent of global operator new and delete.
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require that <<ref_value>> be declared as a class template, which would impose an additional compilation burden. By avoiding the template, most of the function definitions in the library can be excluded from the headers and emitted in a separate static or dynamic library.
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CBOR
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include::quick_look.adoc[] include::dom/overview.adoc[] include::allocators/overview.adoc[] include::io/overview.adoc[] include::conversion/overview.adoc[] include::examples.adoc[] include::faq.adoc[] include::benchmarks.adoc[] include::comparison.adoc[] include::reference.adoc[] include::../../CHANGELOG.adoc[]
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Parameterizing the allocator on the element type is clumsy.
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:leveloffset: -1
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*P0308R0* + <<ref_pilfer>> + <<ref_pilfered>> + <<ref_is_pilfer_constructible>>
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an instance of {ref_polymorphic_allocator} in the same argument position.
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