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[smlnj] Annotation of /sml/trunk/src/cm/paths/pathconfig.sml
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Annotation of /sml/trunk/src/cm/paths/pathconfig.sml

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1 : blume 267 (*
2 :     * Configurable path anchors for new CM.
3 :     *
4 :     * (C) 1999 Lucent Technologies, Bell Laboratories
5 :     *
6 :     * Author: Matthias Blume (blume@kurims.kyoto-u.ac.jp)
7 :     *)
8 :    
9 : blume 265 signature PATHCONFIG = sig
10 : blume 321
11 : blume 318 type mode
12 :    
13 : blume 321 val hardwire : (string * string) list -> mode
14 :     val envcfg : (string * string EnvConfig.getterSetter) list -> mode
15 : blume 318
16 :     val configAnchor : mode -> string -> (unit -> string) option
17 : blume 265 end
18 :    
19 : blume 309 (*
20 :     * The names of config anchors must be names of actual files.
21 :     * Function configAnchor will map the name of the anchor to
22 :     * the directory that contains the corresponding file.
23 :     *)
24 : blume 265 structure PathConfig :> PATHCONFIG = struct
25 : blume 318
26 : blume 321 type mode = string -> (unit -> string) option
27 : blume 318
28 : blume 321 fun hardwire [] (a: string) = NONE
29 :     | hardwire ((a', v) :: t) a =
30 :     if a = a' then SOME (fn () => v) else hardwire t a
31 :    
32 :     fun envcfg [] (a: string) = NONE
33 :     | envcfg ((a', gs) :: t) a =
34 :     if a = a' then SOME (fn () => EnvConfig.getSet gs NONE)
35 :     else envcfg t a
36 :    
37 :     fun configAnchor m s = m s
38 : blume 265 end

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