Extracts the fractional index type from a Fraci type. This utility type infers the digit base, length base, and brand from a Fraci type and constructs the corresponding fractional index type.
The Fraci type to extract from
Extracts the fractional index type from a Fraci type. This utility type infers the digit base, length base, and brand from a Fraci type and constructs the corresponding fractional index type.