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authorGravatar Adam Chlipala <adamc@hcoop.net>2008-06-08 13:59:29 -0400
committerGravatar Adam Chlipala <adamc@hcoop.net>2008-06-08 13:59:29 -0400
commitcce9fcf97f2def0b176303aa1832fe74a0b73686 (patch)
tree211609079bd7c2a1cfa515a1cf0de4a297cba2ee /src/core_env.sml
parentd44758dd02286c136aecaab935fb692761bdc9a6 (diff)
Conversion to Core
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+(* Copyright (c) 2008, Adam Chlipala
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * - The names of contributors may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *)
+
+structure CoreEnv :> CORE_ENV = struct
+
+open Core
+
+structure U = CoreUtil
+
+structure IM = IntBinaryMap
+
+
+(* AST utility functions *)
+
+val liftConInCon =
+ U.Con.mapB {kind = fn k => k,
+ con = fn bound => fn c =>
+ case c of
+ CRel xn =>
+ if xn < bound then
+ c
+ else
+ CRel (xn + 1)
+ | _ => c,
+ bind = fn (bound, U.Con.Rel _) => bound + 1
+ | (bound, _) => bound}
+
+val lift = liftConInCon 0
+
+
+(* Back to environments *)
+
+exception UnboundRel of int
+exception UnboundNamed of int
+
+type env = {
+ relC : (string * kind) list,
+ namedC : (string * kind * con option) IM.map,
+
+ relE : (string * con) list,
+ namedE : (string * con) IM.map
+}
+
+val empty = {
+ relC = [],
+ namedC = IM.empty,
+
+ relE = [],
+ namedE = IM.empty
+}
+
+fun pushCRel (env : env) x k =
+ {relC = (x, k) :: #relC env,
+ namedC = IM.map (fn (x, k, co) => (x, k, Option.map lift co)) (#namedC env),
+
+ relE = map (fn (x, c) => (x, lift c)) (#relE env),
+ namedE = IM.map (fn (x, c) => (x, lift c)) (#namedE env)}
+
+fun lookupCRel (env : env) n =
+ (List.nth (#relC env, n))
+ handle Subscript => raise UnboundRel n
+
+fun pushCNamed (env : env) x n k co =
+ {relC = #relC env,
+ namedC = IM.insert (#namedC env, n, (x, k, co)),
+
+ relE = #relE env,
+ namedE = #namedE env}
+
+fun lookupCNamed (env : env) n =
+ case IM.find (#namedC env, n) of
+ NONE => raise UnboundNamed n
+ | SOME x => x
+
+fun pushERel (env : env) x t =
+ {relC = #relC env,
+ namedC = #namedC env,
+
+ relE = (x, t) :: #relE env,
+ namedE = #namedE env}
+
+fun lookupERel (env : env) n =
+ (List.nth (#relE env, n))
+ handle Subscript => raise UnboundRel n
+
+fun pushENamed (env : env) x n t =
+ {relC = #relC env,
+ namedC = #namedC env,
+
+ relE = #relE env,
+ namedE = IM.insert (#namedE env, n, (x, t))}
+
+fun lookupENamed (env : env) n =
+ case IM.find (#namedE env, n) of
+ NONE => raise UnboundNamed n
+ | SOME x => x
+
+fun declBinds env (d, _) =
+ case d of
+ DCon (x, n, k, c) => pushCNamed env x n k (SOME c)
+ | DVal (x, n, t, _) => pushENamed env x n t
+
+val ktype = (KType, ErrorMsg.dummySpan)
+
+fun bbind env x =
+ case ElabEnv.lookupC ElabEnv.basis x of
+ ElabEnv.NotBound => raise Fail "CoreEnv.bbind: Not bound"
+ | ElabEnv.Rel _ => raise Fail "CoreEnv.bbind: Rel"
+ | ElabEnv.Named (n, _) => pushCNamed env x n ktype NONE
+
+val basis = empty
+val basis = bbind basis "int"
+val basis = bbind basis "float"
+val basis = bbind basis "string"
+
+end