An implicit defining a default Option reader.
An implicit defining a default Option reader. Uses "" as the empty value.
The desired type for the value
An index into the array
Function to extract a value from a given index
Coerce the value from String to type O
The optional value
Read an optional value using the specified value/rules to determine what is considered None vs what is Some(_).
Read an optional value using the specified value/rules to determine what is considered None vs what is Some(_).
The desired type for the value
Rules for determining if a value should be None
Function to extract a value from a given index
Coerce the value from String to type O
The optional value
Extract the value at a given index, transforming it into a given type.
Extract the value at a given index, transforming it into a given type.
The desired type for the value
An index into the array
A Rule for converting the value from String to O
Invalid if the index is out of bounds or the Path was not an IdxPathNode