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annotate src/prim.sml @ 788:f5fea13a60b9

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Constraint syntax
author Adam Chlipala <adamc@hcoop.net>
date Tue, 05 May 2009 14:36:16 -0400
parents 66463006f893
children 395a5d450cc0
rev   line source
adamc@14 1 (* Copyright (c) 2008, Adam Chlipala
adamc@14 2 * All rights reserved.
adamc@14 3 *
adamc@14 4 * Redistribution and use in source and binary forms, with or without
adamc@14 5 * modification, are permitted provided that the following conditions are met:
adamc@14 6 *
adamc@14 7 * - Redistributions of source code must retain the above copyright notice,
adamc@14 8 * this list of conditions and the following disclaimer.
adamc@14 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@14 10 * this list of conditions and the following disclaimer in the documentation
adamc@14 11 * and/or other materials provided with the distribution.
adamc@14 12 * - The names of contributors may not be used to endorse or promote products
adamc@14 13 * derived from this software without specific prior written permission.
adamc@14 14 *
adamc@14 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@14 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@14 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@14 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@14 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@14 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@14 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@14 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@14 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@14 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@14 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@14 26 *)
adamc@14 27
adamc@14 28 structure Prim :> PRIM = struct
adamc@14 29
adamc@14 30 datatype t =
adamc@14 31 Int of Int64.int
adamc@14 32 | Float of Real64.real
adamc@14 33 | String of string
adamc@14 34
adamc@14 35 open Print.PD
adamc@14 36 open Print
adamc@14 37
adamc@14 38 fun p_t t =
adamc@14 39 case t of
adamc@14 40 Int n => string (Int64.toString n)
adamc@14 41 | Float n => string (Real64.toString n)
adamc@95 42 | String s => box [string "\"", string (String.toString s), string "\""]
adamc@14 43
adamc@276 44 fun int2s n =
adamc@276 45 if Int64.compare (n, Int64.fromInt 0) = LESS then
adamc@276 46 "-" ^ Int64.toString (Int64.~ n) ^ "LL"
adamc@276 47 else
adamc@276 48 Int64.toString n ^ "LL"
adamc@276 49
adamc@582 50 fun int2s' n =
adamc@582 51 if Int64.compare (n, Int64.fromInt 0) = LESS then
adamc@582 52 "-" ^ Int64.toString (Int64.~ n)
adamc@582 53 else
adamc@582 54 Int64.toString n
adamc@582 55
adamc@276 56 fun float2s n =
adamc@276 57 if Real64.compare (n, Real64.fromInt 0) = LESS then
adamc@285 58 "-" ^ Real64.toString (Real64.~ n)
adamc@276 59 else
adamc@285 60 Real64.toString n
adamc@276 61
adamc@567 62 fun toString t =
adamc@567 63 case t of
adamc@582 64 Int n => int2s' n
adamc@567 65 | Float n => float2s n
adamc@567 66 | String s => s
adamc@567 67
adamc@276 68 fun p_t_GCC t =
adamc@276 69 case t of
adamc@276 70 Int n => string (int2s n)
adamc@276 71 | Float n => string (float2s n)
adamc@276 72 | String s => box [string "\"", string (String.toString s), string "\""]
adamc@276 73
adamc@183 74 fun equal x =
adamc@183 75 case x of
adamc@183 76 (Int n1, Int n2) => n1 = n2
adamc@183 77 | (Float n1, Float n2) => Real64.== (n1, n2)
adamc@183 78 | (String s1, String s2) => s1 = s2
adamc@183 79
adamc@183 80 | _ => false
adamc@183 81
adamc@479 82 fun compare (p1, p2) =
adamc@479 83 case (p1, p2) of
adamc@479 84 (Int n1, Int n2) => Int64.compare (n1, n2)
adamc@479 85 | (Int _, _) => LESS
adamc@479 86 | (_, Int _) => GREATER
adamc@479 87
adamc@479 88 | (Float n1, Float n2) => Real64.compare (n1, n2)
adamc@479 89 | (Float _, _) => LESS
adamc@479 90 | (_, Float _) => GREATER
adamc@479 91
adamc@479 92 | (String n1, String n2) => String.compare (n1, n2)
adamc@479 93
adamc@14 94 end