Forwards the value of an available tensor from inputs to output.

Merge waits for at least one of the tensors in inputs to become available. It is usually combined with Switch to implement branching.

Merge forwards the first tensor for become available to output, and sets value_index to its index in inputs.

inputs A list of at least 1 mutable Tensor objects with the same type. The input tensors, exactly one of which will become available.
name A name for the operation (optional).

A tuple of Tensor objects (output, value_index).
output A mutable Tensor. Has the same type as inputs.
value_index A Tensor of type int32.