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adamc@2
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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 signature SEARCH = sig
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29
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30 datatype ('state, 'abort) result =
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31 Return of 'abort
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32 | Continue of 'state
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33
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34 type ('data, 'state, 'abort) mapfolder =
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35 'data -> 'state -> ('data * 'state, 'abort) result
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36
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37 val return2 : 'state1 -> 'state2 -> ('state1 * 'state2, 'abort) result
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38
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39 val map : ('state1, 'abort) result
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40 * ('state1 -> 'state2)
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41 -> ('state2, 'abort) result
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42
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43 val map2 : ('state2 -> ('state1 * 'state2, 'abort) result)
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44 * ('state1 -> 'state1')
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45 -> ('state2 -> ('state1' * 'state2, 'abort) result)
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46
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47 val bind : ('state1, 'abort) result
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48 * ('state1 -> ('state2, 'abort) result)
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49 -> ('state2, 'abort) result
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50
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51 val bind2 : ('state2 -> ('state1 * 'state2, 'abort) result)
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52 * ('state1 -> 'state2 -> ('state1' * 'state2, 'abort) result)
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53 -> ('state2 -> ('state1' * 'state2, 'abort) result)
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54
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55 val bindP : (('state11 * 'state12) * 'state2, 'abort) result
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56 * ('state11 -> 'state2 -> ('state11 * 'state2, 'abort) result)
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57 -> (('state11 * 'state12) * 'state2, 'abort) result
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58
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59 end
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