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authorCalvin Morrison <mutantturkey@gmail.com>2013-11-13 13:07:23 -0500
committerCalvin Morrison <mutantturkey@gmail.com>2013-11-13 13:07:23 -0500
commit9066ea884129957fe899d6d10cba1e17547214b9 (patch)
treeaaa3ba9e0e507d9d13d8258def7585675e86f221 /src/nbc/parse-state.sml
parentba07cda9cbf54d33b657d9ee30bc03c0b67f0b5f (diff)
remove nbc:
Diffstat (limited to 'src/nbc/parse-state.sml')
-rw-r--r--src/nbc/parse-state.sml89
1 files changed, 0 insertions, 89 deletions
diff --git a/src/nbc/parse-state.sml b/src/nbc/parse-state.sml
deleted file mode 100644
index 8b30a67..0000000
--- a/src/nbc/parse-state.sml
+++ /dev/null
@@ -1,89 +0,0 @@
-signature PARSE_STATE = sig
- type ('argument, 'result) state
- val create: unit -> ('argument, 'result) state
- type ('argument, 'result) handler =
- TextIO.instream * 'argument -> 'result
- datatype whichCharacters = These of char list | Any
- val build: {
- state: ('argument, 'result) state
- , characters:
- (whichCharacters * ('argument, 'result) handler) list
- , endOfFile: ('argument, 'result) handler
- } -> unit
- val enter:
- ('argument, 'result) state
- * TextIO.instream
- * 'argument
- -> 'result
-end
-
-structure ParseState :> PARSE_STATE = struct
- type ('argument, 'result) handler =
- TextIO.instream * 'argument -> 'result
- datatype whichCharacters = These of char list | Any
- type ('argument, 'result) state = {
- byCharacter: Int8.int vector ref
- , byIndex: ('argument, 'result) handler vector ref
- , endOfFile: ('argument, 'result) handler option ref
- }
- fun create () = {
- byCharacter = ref (Vector.fromList nil)
- , byIndex = ref (Vector.fromList nil)
- , endOfFile = ref NONE
- }
- fun build {
- state = {byCharacter, byIndex, endOfFile}
- , characters
- , endOfFile = newEndOfFile
- } =
- let
- val characters = vector characters
- fun equal (one: char) (two: char) =
- one = two
- fun shallHandle ((whichToHandle, _), char) =
- case whichToHandle of
- Any => true
- | These charactersToHandle =>
- List.exists (equal char)
- charactersToHandle
- fun charToIndex char =
- case
- Vector.findi (fn (_, handler) =>
- shallHandle (handler, char)
- ) characters
- of
- NONE => raise Fail (
- "ParseState.build: "
- ^ Char.toString char
- ^ " not found"
- ) | SOME (index, _) =>
- Int8.fromInt index
- fun handlerToFunction (_, function) = function
- fun indexToFunction index = handlerToFunction (
- Vector.sub (characters, index)
- )
- in
- byCharacter := Vector.tabulate (
- Char.maxOrd + 1
- , charToIndex o chr
- ); byIndex :=
- Vector.map (fn (_, function) =>
- function
- ) characters
- ; endOfFile := SOME newEndOfFile
- end
- fun enter (
- {
- byCharacter = ref byCharacter
- , byIndex = ref byIndex
- , endOfFile = ref endOfFile
- }
- , instream
- , argument
- ) = case TextIO.input1 instream of
- NONE => (valOf endOfFile) (instream, argument)
- | SOME char => Vector.sub (
- byIndex
- , Int8.toInt (Vector.sub (byCharacter, ord char))
- ) (instream, argument)
-end