Dieser Code liest diesen Eingang "(WEEKEND-SUNDAY)" und dann zurück "SAMSTAG" aber Eingabe "WEEKEND-SONNTAG)" immer noch "SAMSTAG" => diesen Parser ignorieren letzte ')'fparsec OperatorPrecedenceParser: Umgang mit unvollständigen Klammern
let pDayOfWeekKeyWords = choice [
pstring "MONDAY" ;
pstring "TUESDAY" ;
pstring "WEDNESDAY" ;
pstring "THURSDAY" ;
pstring "FRIDAY" ;
pstring "SATURDAY" ;
pstring "SUNDAY" ;
pstring "WEEKEND" ;
pstring "WEEKDAY" ;
pstring "ALL" ]
let betweenParentheses p =
between (pstring "(") (pstring ")") p
let opp = new OperatorPrecedenceParser<Set<DayOfWeek>,unit,unit>()
let pExpr = opp.ExpressionParser
let term = (betweenParentheses pExpr) <|> (pDayOfWeekKeyWords |>> (fun x ->
match x with
| "MONDAY" -> Set.ofList [DayOfWeek.Monday]
| "TUESDAY" -> Set.ofList [DayOfWeek.Tuesday]
| "WEDNESDAY" -> Set.ofList [DayOfWeek.Wednesday]
| "THURSDAY" -> Set.ofList [DayOfWeek.Thursday]
| "FRIDAY" -> Set.ofList [DayOfWeek.Friday]
| "SATURDAY" -> Set.ofList [DayOfWeek.Saturday]
| "SUNDAY" -> Set.ofList [DayOfWeek.Sunday]
| "WEEKDAY" -> Set.ofList [DayOfWeek.Monday ; DayOfWeek.Tuesday ; DayOfWeek.Wednesday;DayOfWeek.Thursday;DayOfWeek.Friday]
| "WEEKEND" -> Set.ofList [DayOfWeek.Saturday;DayOfWeek.Sunday]
| "ALL"-> Set.ofList [DayOfWeek.Monday ; DayOfWeek.Tuesday ; DayOfWeek.Wednesday;DayOfWeek.Thursday;DayOfWeek.Friday;DayOfWeek.Saturday;DayOfWeek.Sunday]
| _ -> failwith "ERROR MESSAGE"))
opp.TermParser <- term
opp.AddOperator(InfixOperator<Set<DayOfWeek>,unit,unit>("+", skipString "", 1, Associativity.Left, fun x y -> x + y))
opp.AddOperator(InfixOperator<Set<DayOfWeek>,unit,unit>("-", skipString "" , 1, Associativity.Left, fun x y -> x - y))
Lauf
run pExpr "MONDAY+(WEEKEND-SUNDAY)"
Ausgang
Success: set [Monday; Saturday]
pr oblem ist
run pExpr "MONDAY+WEEKEND-SUNDAY)" or run pExpr "MONDAY)+WEEKEND-SUNDAY"
es noch
Success: set [Monday; Saturday]
zurückkehren will ich es Failure zeigen: etwas ..
habe ich etwas verpasst? Danke