CBOR values without a native R type

Constructors for the four values cbor_decode() returns when R has no faithful type of its own. Encoding accepts them too, to write those values back.

Usage

cbor_map(keys = list(), values = list())

cbor_tag(tag, value)

cbor_simple(value)

cbor_bigint(x)

Arguments

keys, values

Lists (or vectors, taken element by element) of equal length.

tag

A whole number from 0 to 2^53.

value

For cbor_tag(), the tagged content; for cbor_simple(), integer simple values.

x

Decimal strings or whole numbers.

Value

An object of class cbor_map, cbor_tag, cbor_simple or cbor_bigint.

Details

• cbor_map() is a map whose keys are not all non-empty, unique text: COSE and CWT use small integers as keys, for example. keys and values are lists of equal length, in order.

• cbor_tag() is a tagged item: tag is the tag number, value its content. cbor_encode() refuses content its tag number does not allow, such as a number under tag 0.

• cbor_simple() is a simple value other than false, true, null and undefined: 0 to 19 or 32 to 255.

• cbor_bigint() is an integer outside what a double holds exactly, stored as canonical decimal text. It accepts decimal strings, or whole numbers within 2^53.

Examples

cbor_map(list(1L, 3L), list(-7L, "ES256"))
#> <cbor_map: 2 entries>
#> [[1]]
#> [1] -7
#> [[3]]
#> [1] "ES256"
cbor_tag(32, "https://example.com")
#> <cbor_tag 32>
#> [1] "https://example.com"
cbor_simple(16)
#> simple(16)
cbor_bigint("18446744073709551616")
#> <cbor_bigint[1]>
#> [1] 18446744073709551616