Composes two index transforms.

Parameters:¶

const IndexTransform<RankB, RankC, CKindA> &b_to_c¶

Index transform from index space “b” to index space “c”.

const IndexTransform<RankA, RankB, CKindB> &a_to_b¶

Index transform from index space “a” to index space “b”.

Pre:¶

b_to_c.valid() && a_to_b.valid().

Returns:¶

The composed transform with input_rank equal to a_to_b.input_rank() and output_rank equal to b_to_c.output_rank().

Error absl::StatusCode::kInvalidArgument:¶

if a_to_b.output_rank() != b_to_c.input_rank().

Error absl::StatusCode::kOutOfRange:¶

if the range of a_to_b is incompatible with the domain of b_to_c.

Error absl::StatusCode::kInvalidArgument:¶

if integer overflow occurs computing the composed transform.