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Interpret 'table' signature items more flexibly, automatically adding (Ur) constraints to support a kind of subtyping over (SQL) constraint sets
author Adam Chlipala <adam@chlipala.net>
date Mon, 04 Nov 2013 15:14:23 -0500
parents 3e7c7e200713
children 4d64af730e35
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@821 34 | Char of char
adamc@14 35
adamc@14 36 open Print.PD
adamc@14 37 open Print
adamc@14 38
adamc@14 39 fun p_t t =
adamc@14 40 case t of
adamc@14 41 Int n => string (Int64.toString n)
adamc@14 42 | Float n => string (Real64.toString n)
adamc@95 43 | String s => box [string "\"", string (String.toString s), string "\""]
adamc@942 44 | Char ch => box [string "#\"", string (String.toString (String.str ch)), string "\""]
adamc@14 45
adamc@276 46 fun int2s n =
adamc@276 47 if Int64.compare (n, Int64.fromInt 0) = LESS then
adamc@276 48 "-" ^ Int64.toString (Int64.~ n) ^ "LL"
adamc@276 49 else
adamc@276 50 Int64.toString n ^ "LL"
adamc@276 51
adamc@582 52 fun int2s' n =
adamc@582 53 if Int64.compare (n, Int64.fromInt 0) = LESS then
adamc@582 54 "-" ^ Int64.toString (Int64.~ n)
adamc@582 55 else
adamc@582 56 Int64.toString n
adamc@582 57
adam@1468 58 val float2s = String.translate (fn #"~" => "-" | ch => str ch) o Real64.toString
adamc@276 59
adamc@567 60 fun toString t =
adamc@567 61 case t of
adamc@582 62 Int n => int2s' n
adamc@567 63 | Float n => float2s n
adamc@567 64 | String s => s
adamc@821 65 | Char ch => str ch
adamc@567 66
adamc@1053 67 fun pad (n, ch, s) =
adamc@1053 68 if size s >= n then
adamc@1053 69 s
adamc@1053 70 else
adamc@1053 71 str ch ^ pad (n-1, ch, s)
adamc@1053 72
adam@1656 73 fun quoteDouble ch =
adam@1656 74 case ch of
adam@1656 75 #"'" => str ch
adam@1656 76 | _ => Char.toCString ch
adam@1656 77
adam@1656 78 fun toCChar ch =
adam@1656 79 case ch of
adam@1656 80 #"\"" => str ch
adam@1656 81 | _ => Char.toCString ch
adam@1656 82
adam@1656 83 val toCString = String.translate quoteDouble
adam@1656 84
adamc@276 85 fun p_t_GCC t =
adamc@276 86 case t of
adamc@276 87 Int n => string (int2s n)
adamc@276 88 | Float n => string (float2s n)
adam@1656 89 | String s => box [string "\"", string (toCString s), string "\""]
adam@1656 90 | Char ch => box [string "'", string (toCChar ch), string "'"]
adamc@276 91
adamc@183 92 fun equal x =
adamc@183 93 case x of
adamc@183 94 (Int n1, Int n2) => n1 = n2
adamc@183 95 | (Float n1, Float n2) => Real64.== (n1, n2)
adamc@183 96 | (String s1, String s2) => s1 = s2
adamc@821 97 | (Char ch1, Char ch2) => ch1 = ch2
adamc@183 98
adamc@183 99 | _ => false
adamc@183 100
adamc@479 101 fun compare (p1, p2) =
adamc@479 102 case (p1, p2) of
adamc@479 103 (Int n1, Int n2) => Int64.compare (n1, n2)
adamc@479 104 | (Int _, _) => LESS
adamc@479 105 | (_, Int _) => GREATER
adamc@479 106
adamc@479 107 | (Float n1, Float n2) => Real64.compare (n1, n2)
adamc@479 108 | (Float _, _) => LESS
adamc@821 109 | (_, Float _) => GREATER
adamc@479 110
adamc@479 111 | (String n1, String n2) => String.compare (n1, n2)
adamc@821 112 | (String _, _) => LESS
adamc@821 113 | (_, String _) => GREATER
adamc@821 114
adamc@821 115 | (Char ch1, Char ch2) => Char.compare (ch1, ch2)
adamc@479 116
adamc@14 117 end