LeafCursor

Yield the value at this Cursor as a value of type T if possible, an error or the left hand side otherwise.

Yield the value of the field fieldName of this Cursor as a value of type T if possible, an error or the left hand side otherwise.

Yield a list of Cursors corresponding to the values generated by following the path fns from the value at this Cursor, or an error on the left hand side if there is no such path. If the field at the end of the path is a list then yield the concatenation of the lists of cursors corresponding to the field elements.

Does the value at this Cursor generate a list along the path fns?

true if fns is a valid path from the value at this Cursor and passes through at least one field with a list type.

Does the value at this Cursor have a field identified by the path fns?

Yield a list of Cursors corresponding to the values generated by following the path fns from the value at this Cursor, or an error on the left hand side if there is no such path.

Yield a Cursor corresponding to the value of the possibly nullable field fieldName of the value at this Cursor, or an error on the left hand side if there is no such field.

Does the possibly nullable value at this Cursor have a field named fieldName?

Yield a Cursor corresponding to the value of the field identified by path fns starting from the value at this Cursor, or an error on the left hand side if there is no such field.