adamc@377
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1 (* Copyright (c) 2008, Adam Chlipala
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2 * All rights reserved.
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3 *
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4 * Redistribution and use in source and binary forms, with or without
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5 * modification, are permitted provided that the following conditions are met:
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6 *
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7 * - Redistributions of source code must retain the above copyright notice,
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8 * this list of conditions and the following disclaimer.
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9 * - Redistributions in binary form must reproduce the above copyright notice,
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10 * this list of conditions and the following disclaimer in the documentation
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11 * and/or other materials provided with the distribution.
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12 * - The names of contributors may not be used to endorse or promote products
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13 * derived from this software without specific prior written permission.
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14 *
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15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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25 * POSSIBILITY OF SUCH DAMAGE.
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26 *)
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27
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28 structure PathCheck :> PATH_CHECK = struct
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29
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30 open Mono
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31
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32 structure E = ErrorMsg
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33
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34 structure SS = BinarySetFn(struct
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35 type ord_key = string
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36 val compare = String.compare
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37 end)
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38
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39 fun checkDecl ((d, loc), (funcs, rels, cookies, styles)) =
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40 let
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41 fun doFunc s =
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42 (if SS.member (funcs, s) then
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43 E.errorAt loc ("Duplicate function path " ^ s)
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44 else
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45 ();
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46 (SS.add (funcs, s), rels, cookies, styles))
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47
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48 fun doRel s =
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49 (if SS.member (rels, s) then
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50 E.errorAt loc ("Duplicate table/sequence path " ^ s)
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51 else
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52 ();
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53 (funcs, SS.add (rels, s), cookies, styles))
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54
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55 fun doCookie s =
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56 (if SS.member (cookies, s) then
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57 E.errorAt loc ("Duplicate cookie path " ^ s)
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58 else
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59 ();
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60 (funcs, rels, SS.add (cookies, s), styles))
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61
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62 fun doStyle s =
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63 (if SS.member (styles, s) then
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64 E.errorAt loc ("Duplicate style path " ^ s)
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65 else
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66 ();
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67 (funcs, rels, cookies, SS.add (styles, s)))
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68 in
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69 case d of
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70 DExport (_, s, _, _, _, _) => doFunc s
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71
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72 | DTable (s, _, pe, ce) =>
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73 let
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74 fun constraints (e, rels) =
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75 case #1 e of
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76 ERecord [(s', _, _)] =>
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77 let
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78 val s' = s ^ "_" ^ s'
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79 in
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80 if SS.member (rels, s') then
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81 E.errorAt loc ("Duplicate constraint path " ^ s')
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82 else
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83 ();
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84 SS.add (rels, s')
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85 end
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86 | EStrcat (e1, e2) => constraints (e2, constraints (e1, rels))
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87 | _ => rels
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88
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89 val rels = #2 (doRel s)
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90 val rels = case #1 pe of
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91 EPrim (Prim.String "") => rels
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92 | _ =>
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93 let
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94 val s' = s ^ "_Pkey"
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95 in
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96 if SS.member (rels, s') then
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97 E.errorAt loc ("Duplicate primary key constraint path " ^ s')
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98 else
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99 ();
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100 SS.add (rels, s')
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101 end
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102 in
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103 (funcs, constraints (ce, rels), cookies, styles)
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104 end
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105 | DSequence s => doRel s
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106
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107 | DCookie s => doCookie s
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108 | DStyle s => doStyle s
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109
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110 | _ => (funcs, rels, cookies, styles)
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111 end
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112
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adam@1845
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113 fun check (ds, _) = ignore (foldl checkDecl (SS.empty, SS.empty, SS.empty, SS.empty) ds)
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114
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115 end
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