Îõ³h$.ú,ðå      !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcd(c) Andrey Mulik 2020 BSD-stylework.a.mulik@gmail.comSafe&'(./9>ÀÁÂÉèS'fmr#Service class for switchable types.fmr s n. "toggles" the state represented by the value s by n positions, for example: ä toggle n False = even n toggle n True = odd n toggle n 1234 = 1239 + n fmrSwitch property modifier. Note that « is designed for deterministic switches with a pre-known set of states and order of transitions between them, without branches. If you need more complex behavior, use .fmr Repeated increment or decrement.fmrProperty modifier class. Note that  FieldModifier3 doesn't go well with write-only fields, because  returns new value, and  also assumes the possibility of old value "leaking" (hence the   constraint is imposed on it).fmr field record upd modifies record field using upd. Returns new value.fmr field record upd modifies record field using updÇ. Note that assumes the possibility of old value "leaking", e.g.:  -- get value using à getLeak = do -- Some read-only fields x <- newWriteOnly y <- varé Nothing -- write current value to y and do not modify. modifyRecordM this x ( val -> do set [this := Just val]; return val) -- leaking: return current value of "write-only" record get this y +So you cannot use it for write-only fields.fmr!@since 0.2 Property setter class.fmr field record value sets new record value. fmr!@since 0.2 Property getter class. fmr  field record return record's value using field. fmr @since 0.2 Service kind synonym. fmr @since 0.2 Service kind synonym. fmr / is a property class that allows you to extend fmrÍ syntax. Now you can create new property types and use it with existing in # list of actions.fmrperformProp record prop  performs an action on record using prop.fmrÙ is new, generalized and extensible property type (existential), which may contain any   value.fmrMonadic group modifier with record. set record [fields :~<$ f] modifies values of record's fields using f record procedure. Note that the f record is called every time a field value is assigned. à set record [field :~<$ const f] === set record [fields :<~$ f] fmrMonadic group modifier. set record [fields :<~$ f] modifies values of record's fields using f procedure. … set record [[field] :<~$ f] === set record [field :<~ f] set record [fields :<~$ const mval] === set record [field :<=$ mval] fmrMonadic value modifier with record. set record [field :<~ f] modifies value of record's field using f record procedure. Note that the f record is called every time a field value is assigned. Á set record [field :~< const f] === set record [fields :<~ f] fmrMonadic value modifier. set record [field :<~ f] modifies value of record's field using f procedure. Note that the mvalue is called every time a field value is assigned. Å set record [field :<~ return val] === set record [fields := val] fmrMonadic group setter with record. set record [fields :=<$ f] set result of f record to record's fields . Note that f recordò is evaluated only once, on the first assignment. Thus, the values of all the listed fields will be identical. Õ set record [[field] :=<$ f] === set record [field :=< val] set record [fields :=<$ const val] = set record [fields :=$ val] set record [fields :=<$ f] === do val <- f record; set record [fields :=$ val] fmrMonadic group setter. set record [fields :<=$ mvalue] set result of mvalue to record's fields . Note that mvalueð is evaluated only once, on the first assignment. Thus, the values of all the listed fields will be identical. — set record [[field] :<=$ const f] === set record [field :<= val] set record [fields :<=$ mval] === do val <- mval; set record [fields :<=$ val] fmrMonadic value setter with record. set record [field :=< mvalue] set result of  mvalue record to record's field. Note that the mvalue is evaluated every time a field value is assigned. ’ set record [field :=< const val] === set record [field :<= val] set record [field :=< f] === do val <- f record; set record [field := val] fmrMonadic value setter. set record [field :<= mvalue] set result of mvalue to record's field. Note that the mvalue is evaluated every time a field value is assigned. ’ set record [field :<= return val] === set record [field := val] set record [field :<= mval] === do val <- mval; set record [field :<= val] fmrPure group modifier with record. set record [fields ::~$ f] modify values of record's fields using f record function. þ set record [[field] ::~$ f] === set record [field ::~ f] set record [fields ::~$ const f] === set record [field :~$ f] fmrPure group modifier. set record [fields :~$ f] modify values of record's fields using f function. ƒ set record [[field] :~$ val] === set record [field :~ val] set record [fields :~$ const val] === set record [field :=$ val] fmrPure value modifier with record. set record [field ::~ f] modify value of record's field using f record function. ? set record [field ::~ const f] === set record [field :~ f] fmrPure value modifier. set record [field :~ f] modify value of record's field using f function.  set record [field :~ const val] === set record [field := val] fmrPure group setter with record. set record [fields ::=$ f] set f record to record's some fields. ƒ set record [[field] ::=$ f] === set record [field ::= f] set record [fields ::=$ const val] === set record [fields :=$ val] fmrPure group setter. set record [fields :=$ value] set value to record 's some fields. à set record [[field] :=$ value] === set record [field := value] fmrPure value setter with record. set record [field ::= f] set f record to record's field. à set record [field ::= const val] === set record [field := val] fmrPure value setter. set record [field := value] set value to record's field.!fmrThe !) function reads current value of a field."fmr" fields record returns list of record fields values.#fmr# is the main function in fmrï, which allows you to describe changing the value of a record as a sequence of operations on its fields, e.g.$fmrJust synonym for #.%fmr% changes the value by n steps.&fmr& field is same as switch field 1.'fmr' field is same as switch field (-1).(  !"#$%&'(   !"#$ %&'(c) Andrey Mulik 2021 BSD-stylework.a.mulik@gmail.com Safe-Inferred Þ-fmrÅSimple field observer, which can run some handlers after each action./fmrField to observe.0fmr  observer1fmr observer2fmr observer3fmr$Create field with default observers./  !"#$%&'-./0123-./0123(c) Andrey Mulik 2020-2021 BSD-stylework.a.mulik@gmail.com Trustworthy >?ÀÁÂÉ×è&u8fmr8Ð is a class of monads for which defined at least one type of mutable variable.Note that a variable of type (Var m)  should be as simple possible for a given monad. I only has to implement the basic operations triad: read, write and update (which don't have to be atomic).9fmr(9 m)& is type of mutable variable in monad m.:fmrThe : class provides ; field for entire record access.#Please note that you cannot create : and 8' instances for some monad separately.;fmr;! is common variable access field.<fmr+Create and initialize new mutable variable.=fmrMonadic modifier type.>fmrModifier type.?fmr Setter type.@fmr Getter type.Afmr8Normal field, which contain getter, setter and modifier.Since fmr-0.2(, you can also combine fmr fields using (e) and f from the g class: ¤ outer :: (Monad m) => Field m outer inner inner :: (Monad m) => Field m inner value field :: (Monad m) => Field m outer value field = outer.inner Cfmr Field getterDfmr Field setterEfmrField modifierFfmrMonadic field modifierGfmrG0 creates new field from given getter and setter.89:<;=>?@ABCDEFGABCDEFG@?>=:<;89(c) Andrey Mulik 2020-2021 BSD-stylework.a.mulik@gmail.comSafe'(,œTfmrT; is a helper type that stores a variable and its accessors.UfmrUõ is a structure containing accessors for a specific field of a specific record. As a rule, it makes sense to store U$ in the record to which it refers.Wfmr+Create new reference to the given variable.XfmrGet an associated U" reference to the given reference.YfmrYÌ represents field with mutable value and accessors. Unlike fields of type A, Yó fields are undesirable (and sometimes impossible) to be stored in the global environment. The dynamic nature of Yâ means changing accessors for specific records, so accessors do not contain a record argument.Yî isn't designed for accessing external abstract objects and interfaces, it doesn't give the same freedom as Aƒ, but at the same time it allows you to create flexible connections between fields and values without having to reconcile them.Y8 contains a function that takes a record and returns an U.Example: ’ newtype HasField a = HasField {someField :: MFieldRep IO a} field :: MField IO (HasField a) a field = MField (ref.someField) main :: IO () main = do putStrLn "Put some number" record <- fmap HasField $ link =<< var =<< readLn :: IO (HasField Integer) print =<< get field record set record [getter field :~ fmap (* 2)] print =<< get field record Ä  !"#$%&'899:<;=>?@ABFECDGTUVXWYZ[\]^ YZVXWUT[\]^è      !"#$%&'()*+,-./01123456789:;<=>?@ABCDDEFGHIJKLMNOPQRSTUVWXYZ[[\]^_`abcdefghfgifgjëfmr-0.2-4revSi37ajCKitozewkEa Data.PropertyData.Field.Observe Data.Field Data.MFieldIsSwitchtoggle FieldSwitch switchRecord FieldModify modifyRecord modifyRecordMFieldSet setRecordFieldGet getRecord PropertyKind FieldKindIsProp performPropProp:~<$:<~$:~<:<~:=<$:<=$:=<:<=::~$:~$::~:~::=$:=$::=:=getgets'setsets'switchincrdecr$fIsPropSetProp$fIsPropModifyProp $fIsSwitchi$fIsSwitchBool$fIsPropSwitchPropObserveobservedonGetonSetonModifyobserve$fFieldModifyObserve$fFieldSetObserve$fFieldGetObserve$fFieldSwitchObserveMonadVarVarIsMVarthisvar ModifierMFor ModifierFor SetterFor GetterForFieldgetFieldsetField modifyField modifyFieldMsfield$fFieldSwitchField$fFieldModifyField$fFieldSetField$fFieldGetField$fCategoryTYPEField $fMonadVarSTM $fMonadVarIO $fMonadVarST$fIsMVarSTMTVar$fIsMVarIOMVar$fIsMVarIOIORef$fIsMVarSTSTRef MFieldRep MFieldRefIsReflinkrefMFieldgettersettermodifier modifierM$fIsRefMFieldRef$fFieldSwitchMField$fFieldModifyMField$fFieldSetMField$fFieldGetMField$fIsRefMFieldRepbaseControl.Category.idCategory