parser::parser

`parser::parser`

Constructors.

Synopsis

parser() noexcept; (1)

explicit
parser(
    storage_ptr sp) noexcept; (2)

parser(
    storage_ptr sp,
    parse_options const& opt) noexcept; (3)

parser(
    storage_ptr sp,
    parse_options const& opt,
    unsigned char* buffer,
    std::size_t size) noexcept; (4)

template<
    std::size_t N>
parser(
    storage_ptr sp,
    parse_options const& opt,
    unsigned char (&buffer) [N]) noexcept; (5)

parser(
    storage_ptr sp,
    parse_options const& opt,
    std::byte* buffer,
    std::size_t size) noexcept; (6)

template<
    std::size_t N>
parser(
    storage_ptr sp,
    parse_options const& opt,
    std::byte (&buffer) [N]) noexcept; (7)

parser(
    parser const&) = delete; (8)

Description

Construct a new parser.

The parser will only support standard JSON if overloads (1) or (2) are used. Otherwise the parser will support extensions specified by the parameter opt.

The parsed value will use the default memory resource for storage. To use a different resource, call reset after construction.

The main difference between the overloads is in what the constructed parser will use for temporary storage:

(1) the constructed parser uses the default memory resource for temporary storage.
(2), (3) the constructed parser uses the memory resource of sp for temporary storage.
(4), (6) the constructed parser first uses the caller-owned storage [buffer, buffer + size) for temporary storage, falling back to the memory resource of sp if needed.
(5), (7) the constructed parser first uses the caller-owned storage [buffer, buffer + N) for temporary storage, falling back to the memory resource of sp if needed.

Ownership of buffer is not transferred. The caller is responsible for ensuring the lifetime of the storage pointed to by buffer extends until the parser is destroyed.

Overload (8) is the copy constructor. The type is neither copyable nor movable, so the overload is deleted.

Complexity

Constant.

Exception Safety

No-throw guarantee.

Template Parameters

Type	Description
`N`	The number of valid bytes in `buffer`.

Parameters

Name Description

Name	Description
`sp`	The memory resource to use for temporary storage.
`opt`	The parsing options to use.
`buffer`	A pointer to valid storage.
`size`	The number of valid bytes in `buffer`.

sp

The memory resource to use for temporary storage.

opt

The parsing options to use.

buffer

A pointer to valid storage.

size

The number of valid bytes in buffer.

Edit this page