From 485f8c00cc43334ba7bb429a830eb3b651ff92f6 Mon Sep 17 00:00:00 2001 From: Adam Chlipala Date: Sat, 26 Jan 2008 14:27:33 -0500 Subject: Start of elaboration --- src/search.sig | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 src/search.sig (limited to 'src/search.sig') diff --git a/src/search.sig b/src/search.sig new file mode 100644 index 00000000..65fc6aa6 --- /dev/null +++ b/src/search.sig @@ -0,0 +1,62 @@ +(* 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. + *) + +signature SEARCH = sig + + datatype ('state, 'abort) result = + Return of 'abort + | Continue of 'state + + type ('data, 'state, 'abort) mapfold_arg = + 'data * 'state -> ('data * 'state, 'abort) result + + type ('data, 'state, 'abort) mapfolder = + 'data -> 'state -> ('data * 'state, 'abort) result + + val return2 : 'state1 -> 'state2 -> ('state1 * 'state2, 'abort) result + + val map : ('state1, 'abort) result + * ('state1 -> 'state2) + -> ('state2, 'abort) result + + val map2 : ('state2 -> ('state1 * 'state2, 'abort) result) + * ('state1 -> 'state1') + -> ('state2 -> ('state1' * 'state2, 'abort) result) + + val bind : ('state1, 'abort) result + * ('state1 -> ('state2, 'abort) result) + -> ('state2, 'abort) result + + val bind2 : ('state2 -> ('state1 * 'state2, 'abort) result) + * ('state1 -> 'state2 -> ('state1 * 'state2, 'abort) result) + -> ('state2 -> ('state1 * 'state2, 'abort) result) + + val bindP : (('state11 * 'state12) * 'state2, 'abort) result + * ('state11 * 'state2 -> ('state11 * 'state2, 'abort) result) + -> (('state11 * 'state12) * 'state2, 'abort) result + +end -- cgit v1.2.3