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4.15.7 Field Status

The field status specifies whether the field has been edited. It is initially #f and when the user enters something and the data buffer gets modified, it becomes #t. So a field’s status can be queried to find out if it has been modified or not.

The two procedures that work with field status are set-field-status! and field-status?. The procedure field-status? returns the current state, and set-field-status! can be used to set the state.