Optional¶

Optional - 28¶

Version¶

name: Optional (GitHub)
domain: main
since_version: 28
function: False
support_level: SupportType.COMMON
shape inference: True

This version of the operator has been available since version 28.

Summary¶

Constructs an optional-type value containing either an empty optional of a certain type specified by the attribute, or a non-empty value containing the input element.

Attributes¶

type - TYPE_PROTO :

Type of the element in the optional output

Inputs¶

Between 0 and 1 inputs.

input (optional, heterogeneous) - V:

The input element.

Outputs¶

output (heterogeneous) - O:

The optional output enclosing the input element.

Type Constraints¶

V in ( seq(tensor(bfloat16)), seq(tensor(bool)), seq(tensor(complex128)), seq(tensor(complex64)), seq(tensor(double)), seq(tensor(float)), seq(tensor(float16)), seq(tensor(float4e2m1)), seq(tensor(float6e2m3)), seq(tensor(float6e3m2)), seq(tensor(float8e4m3fn)), seq(tensor(float8e4m3fnuz)), seq(tensor(float8e5m2)), seq(tensor(float8e5m2fnuz)), seq(tensor(float8e8m0)), seq(tensor(int16)), seq(tensor(int2)), seq(tensor(int32)), seq(tensor(int4)), seq(tensor(int64)), seq(tensor(int8)), seq(tensor(string)), seq(tensor(uint16)), seq(tensor(uint2)), seq(tensor(uint32)), seq(tensor(uint4)), seq(tensor(uint64)), seq(tensor(uint8)), tensor(bfloat16), tensor(bool), tensor(complex128), tensor(complex64), tensor(double), tensor(float), tensor(float16), tensor(float4e2m1), tensor(float6e2m3), tensor(float6e3m2), tensor(float8e4m3fn), tensor(float8e4m3fnuz), tensor(float8e5m2), tensor(float8e5m2fnuz), tensor(float8e8m0), tensor(int16), tensor(int2), tensor(int32), tensor(int4), tensor(int64), tensor(int8), tensor(string), tensor(uint16), tensor(uint2), tensor(uint32), tensor(uint4), tensor(uint64), tensor(uint8) ):

Constrain input type to all tensor and sequence types.
O in ( optional(seq(tensor(bfloat16))), optional(seq(tensor(bool))), optional(seq(tensor(complex128))), optional(seq(tensor(complex64))), optional(seq(tensor(double))), optional(seq(tensor(float))), optional(seq(tensor(float16))), optional(seq(tensor(float4e2m1))), optional(seq(tensor(float6e2m3))), optional(seq(tensor(float6e3m2))), optional(seq(tensor(float8e4m3fn))), optional(seq(tensor(float8e4m3fnuz))), optional(seq(tensor(float8e5m2))), optional(seq(tensor(float8e5m2fnuz))), optional(seq(tensor(float8e8m0))), optional(seq(tensor(int16))), optional(seq(tensor(int2))), optional(seq(tensor(int32))), optional(seq(tensor(int4))), optional(seq(tensor(int64))), optional(seq(tensor(int8))), optional(seq(tensor(string))), optional(seq(tensor(uint16))), optional(seq(tensor(uint2))), optional(seq(tensor(uint32))), optional(seq(tensor(uint4))), optional(seq(tensor(uint64))), optional(seq(tensor(uint8))), optional(tensor(bfloat16)), optional(tensor(bool)), optional(tensor(complex128)), optional(tensor(complex64)), optional(tensor(double)), optional(tensor(float)), optional(tensor(float16)), optional(tensor(float4e2m1)), optional(tensor(float6e2m3)), optional(tensor(float6e3m2)), optional(tensor(float8e4m3fn)), optional(tensor(float8e4m3fnuz)), optional(tensor(float8e5m2)), optional(tensor(float8e5m2fnuz)), optional(tensor(float8e8m0)), optional(tensor(int16)), optional(tensor(int2)), optional(tensor(int32)), optional(tensor(int4)), optional(tensor(int64)), optional(tensor(int8)), optional(tensor(string)), optional(tensor(uint16)), optional(tensor(uint2)), optional(tensor(uint32)), optional(tensor(uint4)), optional(tensor(uint64)), optional(tensor(uint8)) ):

Constrain output type to all optional tensor or optional sequence types.

Optional - 15 vs 28

Optional - 15¶