000001| (** Abstract string datatype and operations *)
000002|
000003| type elem =
000004| | Bot
000005| | Const of string
000006| | Top
000007|
000008| (* eq : elem -> elem -> bool *)
000009| let eq (a:elem) a' = (*[745613]*)a = a'
000010|
000011| (* leq : elem -> elem -> bool *)
000012| let leq s s' = match s,s' with
000013| | Bot,_ -> (*[25569135]*)true
000014| | _,Bot -> (*[699621]*)false
000015| | _,Top -> (*[16404435]*)true
000017| | Const c, Const c' -> (*[15992524]*)c=c'
000018|
000019| (* join : elem -> elem -> elem *)
000020| let join s s' = match s,s' with
000021| | Bot,_ -> (*[10641574]*)s'
000022| | _,Bot -> (*[612814]*)s
000023| | Top,_ -> (*[7069584]*)Top
000024| | _,Top -> (*[439334]*)Top
000025| | Const c, Const c' -> (*[6658812]*)if c=c' then (*[6508467]*)s else (*[150345]*)Top
000026|
000027| (* meet : elem -> elem -> elem *)
000028| let meet s s' = match s,s' with
000029| | Bot,_ -> (*[1792629]*)Bot
000030| | _,Bot -> (*[503732]*)Bot
000031| | Top,_ -> (*[710345]*)s'
000032| | _,Top -> (*[162613]*)s
000033| | Const c, Const c' -> (*[668290]*)if c=c' then (*[596871]*)s else (*[71419]*)Bot
000034|
000035| (* const : string -> elem *)
000036| let const s = (*[25708484]*)Const s
000037|
000038| (* bot : elem *)
000039| let bot = (*[1]*)Bot
000040|
000041| (* top : elem *)
000042| let top = (*[1]*)Top
000043|
000044| (* upper : elem -> elem *)
000045| let upper s = match s with
000046| | Bot -> (*[6060]*)Bot
000047| | Top -> (*[7833]*)Top
000048| | Const c -> (*[3047]*)Const (String.uppercase c)
000049|
000050| (* lower : elem -> elem *)
000051| let lower s = match s with
000052| | Bot -> (*[5923]*)Bot
000053| | Top -> (*[7917]*)Top
000054| | Const c -> (*[3174]*)Const (String.lowercase c)
000055|
000056| (* concat : elem -> elem -> elem *)
000057| let concat s s' = match s,s' with
000058| | Bot,_ -> (*[5894]*)Bot
000059| | _,Bot -> (*[3884]*)Bot
000060| | Top,_ -> (*[8680]*)Top
000061| | _,Top -> (*[1684]*)Top
000062| | Const c, Const c' -> (*[1985]*)Const (c ^ c')
000063|
000064| (* empty : elem -> bool *)
000065| let empty s = (*[5000]*)s = Bot
000066|
000067| (* nonempty : elem -> bool *)
000068| let nonempty s = (*[45380]*)s <> Bot
000069|
000070|
000071| (** {3 Pretty printing routine } *)
000072|
000073| (* to_string : elem -> unit *)
000074| let to_string s = match s with
000075| | Bot -> "Bot"
000076| | Const c -> "Const \"" ^ c ^ "\""
000077| | Top -> "Top"
000078|
000079| (* pprint : elem -> unit *)
000080| let pprint s = match s with
000081| | Bot -> Format.printf "Bot"
000082| | Const c -> Format.printf "Const \"%s\"" c
000083| | Top -> Format.printf "Top"
000016| | Top,_ -> (*[0]*)false