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(.module:
[lux #*
[control
[monoid (#+ Monoid)]
[equivalence (#+ Equivalence)]
[order (#+ Order)]
[monad (#+ do Monad)]
[codec (#+ Codec)]
hash]
[data
["." maybe]
[number
["." i64]]
[collection
["." list ("list/" Fold<List>)]]]
[language
["." host]]])
(def: #export (size x)
(-> Text Nat)
("lux text size" x))
(def: #export (nth idx input)
(-> Nat Text (Maybe Nat))
("lux text char" input idx))
(def: #export (index-of' pattern from input)
(-> Text Nat Text (Maybe Nat))
("lux text index" input pattern from))
(def: #export (index-of pattern input)
(-> Text Text (Maybe Nat))
("lux text index" input pattern +0))
(def: (last-index-of'' part since text)
(-> Text Nat Text (Maybe Nat))
(case ("lux text index" text part (inc since))
#.None
(#.Some since)
(#.Some since')
(last-index-of'' part since' text)))
(def: #export (last-index-of' part from text)
(-> Text Nat Text (Maybe Nat))
(case ("lux text index" text part from)
(#.Some since)
(last-index-of'' part since text)
#.None
#.None))
(def: #export (last-index-of part text)
(-> Text Text (Maybe Nat))
(case ("lux text index" text part +0)
(#.Some since)
(last-index-of'' part since text)
#.None
#.None))
(def: #export (starts-with? prefix x)
(-> Text Text Bit)
(case (index-of prefix x)
(#.Some +0)
#1
_
#0))
(def: #export (ends-with? postfix x)
(-> Text Text Bit)
(case (last-index-of postfix x)
(#.Some n)
(n/= (size x)
(n/+ (size postfix) n))
_
#0))
(def: #export (contains? sub text)
(-> Text Text Bit)
(case ("lux text index" text sub +0)
(#.Some _)
#1
_
#0))
(def: #export (clip from to input)
(-> Nat Nat Text (Maybe Text))
("lux text clip" input from to))
(def: #export (clip' from input)
(-> Nat Text (Maybe Text))
("lux text clip" input from (size input)))
(def: #export (split at x)
(-> Nat Text (Maybe [Text Text]))
(case [(..clip +0 at x) (..clip' at x)]
[(#.Some pre) (#.Some post)]
(#.Some [pre post])
_
#.None))
(def: #export (split-with token sample)
(-> Text Text (Maybe [Text Text]))
(do maybe.Monad<Maybe>
[index (index-of token sample)
[pre post'] (split index sample)
[_ post] (split (size token) post')]
(wrap [pre post])))
(def: #export (split-all-with token sample)
(-> Text Text (List Text))
(case (..split-with token sample)
(#.Some [pre post])
(#.Cons pre (split-all-with token post))
#.None
(#.Cons sample #.Nil)))
(def: #export split-lines
(..split-all-with "\n"))
(def: #export (replace-once pattern value template)
(-> Text Text Text Text)
(<| (maybe.default template)
(do maybe.Monad<Maybe>
[[pre post] (split-with pattern template)]
(wrap ($_ "lux text concat" pre value post)))))
(def: #export (replace-all pattern value template)
(-> Text Text Text Text)
(case (..split-with pattern template)
(#.Some [pre post])
($_ "lux text concat" pre value (replace-all pattern value post))
#.None
template))
(structure: #export _ (Equivalence Text)
(def: (= test subject)
("lux text =" subject test)))
(structure: #export _ (Order Text)
(def: eq Equivalence<Text>)
(def: (< test subject)
("lux text <" subject test))
(def: (<= test subject)
(or ("lux text <" subject test)
("lux text =" subject test)))
(def: (> test subject)
("lux text <" test subject))
(def: (>= test subject)
(or ("lux text <" test subject)
("lux text =" test subject)))
)
(structure: #export _ (Monoid Text)
(def: identity "")
(def: (compose left right)
("lux text concat" left right)))
(structure: #export _ (Hash Text)
(def: eq Equivalence<Text>)
(def: (hash input)
(`` (for {(~~ (static host.jvm))
(|> input
(: (primitive "java.lang.String" []))
"jvm invokevirtual:java.lang.String:hashCode:"
"jvm convert int-to-long"
(:coerce Nat))}
## Platform-independent default.
(let [length ("lux text size" input)]
(loop [idx +0
hash +0]
(if (n/< length idx)
(let [char (|> idx ("lux text char" input) (maybe.default +0))]
(recur (inc idx)
(|> hash
(i64.left-shift +5)
(n/- hash)
(n/+ char))))
hash)))))))
(def: #export concat
(-> (List Text) Text)
(let [(^open) Monoid<Text>]
(|>> list.reverse (list/fold compose identity))))
(def: #export (join-with sep texts)
(-> Text (List Text) Text)
(|> texts (list.interpose sep) concat))
(def: #export (empty? text)
(-> Text Bit)
(case text
"" #1
_ #0))
(def: #export (enclose [left right] content)
{#.doc "Surrounds the given content text with left and right side additions."}
(-> [Text Text] Text Text)
(let [(^open) Monoid<Text>]
($_ "lux text concat" left content right)))
(def: #export (enclose' boundary content)
{#.doc "Surrounds the given content text with the same boundary text."}
(-> Text Text Text)
(enclose [boundary boundary] content))
(def: #export encode
(-> Text Text)
(|>> (replace-all "\\" "\\\\")
(replace-all "\t" "\\t")
(replace-all "\v" "\\v")
(replace-all "\b" "\\b")
(replace-all "\n" "\\n")
(replace-all "\r" "\\r")
(replace-all "\f" "\\f")
(replace-all "\"" "\\\"")
(..enclose' "\"")))
(def: #export from-code
(-> Nat Text)
(|>> (:coerce Int) "lux int char"))
(def: #export (space? char)
{#.doc "Checks whether the character is white-space."}
(-> Nat Bit)
(case char
(^or (^ (char "\t")) (^ (char "\v"))
(^ (char " ")) (^ (char "\n"))
(^ (char "\r")) (^ (char "\f")))
#1
_
#0))
|
