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[smlnj] Annotation of /sml/trunk/src/cm/semant/primitive.sml
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Annotation of /sml/trunk/src/cm/semant/primitive.sml

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1 : blume 274 (*
2 :     * "Primitive" classes in CM.
3 :     * - provide access to compiler internals in an orderly fashion
4 :     *
5 :     * (C) 1999 Lucent Technologies, Bell Laboratories
6 :     *
7 :     * Author: Matthias Blume (blume@kurims.kyoto-u.ac.jp)
8 :     *)
9 : blume 270 signature PRIMITIVE = sig
10 :    
11 : blume 286 type configuration
12 : blume 270 type primitive
13 :    
14 : blume 279 val eq : primitive * primitive -> bool
15 :    
16 : blume 274 val fromString : string -> primitive option
17 : blume 273 val toString : primitive -> string
18 : blume 272
19 : blume 295 val pervasive : primitive
20 :    
21 : blume 278 (* the domain of (lookup p) must always properly include (exports p) *)
22 : blume 286 val exports : configuration -> primitive -> SymbolSet.set
23 :     val lookup : configuration -> primitive -> Symbol.symbol -> DAEnv.value
24 : blume 295 val env : configuration -> primitive -> GenericVC.Environment.environment
25 :     val pidInfo : configuration -> primitive
26 :     -> { statpid: GenericVC.PersStamps.persstamp,
27 :     sympid: GenericVC.PersStamps.persstamp,
28 :     ctxt: GenericVC.Environment.staticEnv }
29 : blume 286
30 :     val configuration :
31 :     { basis: GenericVC.Environment.environment }
32 :     -> configuration
33 : blume 270 end
34 :    
35 : blume 272 structure Primitive :> PRIMITIVE = struct
36 : blume 270
37 : blume 286 structure BE = GenericVC.BareEnvironment
38 : blume 294 structure E = GenericVC.Environment
39 : blume 286 structure DE = DAEnv
40 : blume 270
41 : blume 286 (* For now, we only know about the "basis".
42 :     * This is for testing only -- the basis will become a real
43 :     * "non-primitive" library, and there will be other primitives
44 :     * that are used to implement the basis. *)
45 :     datatype primitive =
46 :     BASIS
47 :    
48 :     type pinfo = { exports : SymbolSet.set,
49 : blume 294 lookup : Symbol.symbol -> DE.value,
50 : blume 295 env : GenericVC.Environment.environment }
51 : blume 286
52 :     type configuration = primitive -> pinfo
53 :    
54 : blume 279 fun eq (p1 : primitive, p2) = p1 = p2
55 :    
56 : blume 286 fun fromString "basis" = SOME BASIS
57 : blume 274 | fromString _ = NONE
58 :    
59 : blume 286 fun toString BASIS = "basis"
60 : blume 274
61 : blume 295 val pervasive = BASIS
62 :    
63 : blume 286 fun exports (cfg: configuration) p = #exports (cfg p)
64 :     fun lookup (cfg: configuration) p = #lookup (cfg p)
65 : blume 295 fun env (cfg: configuration) p = #env (cfg p)
66 : blume 286
67 :     fun configuration { basis } = let
68 : blume 294
69 :     fun gen_pinfo e = let
70 :     fun l2s l = let
71 :     fun addModule (sy, set) =
72 :     case Symbol.nameSpace sy of
73 :     (Symbol.STRspace | Symbol.SIGspace |
74 :     Symbol.FCTspace | Symbol.FSIGspace) =>
75 : blume 286 SymbolSet.add (set, sy)
76 : blume 294 | _ => set
77 :     in
78 :     foldl addModule SymbolSet.empty l
79 :     end
80 : blume 286
81 : blume 294 fun cvt_fctenv { symbols, look } =
82 :     { looker = cvt_result o look, domain = l2s o symbols }
83 : blume 286
84 : blume 294 and cvt_result (BE.CM_ENV cme) = SOME (DE.FCTENV (cvt_fctenv cme))
85 :     | cvt_result BE.CM_NONE = NONE
86 : blume 286
87 : blume 294 val sb = BE.staticPart (GenericVC.CoerceEnv.e2b e)
88 : blume 286
89 : blume 294 val { domain, looker } =
90 :     cvt_fctenv { symbols = fn () => BE.catalogEnv sb,
91 :     look = BE.cmEnvOfModule sb }
92 :     in
93 : blume 295 { exports = domain (), lookup = valOf o looker, env = e }
94 : blume 294 end
95 :    
96 :     val basis_pinfo = gen_pinfo basis
97 :     fun cfg BASIS = basis_pinfo
98 : blume 286 in
99 :     cfg
100 :     end
101 : blume 295 fun pidInfo c _ = Dummy.f ()
102 : blume 270 end

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