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annotate src/source_print.sml @ 8:a455a9f85cc3

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Parsing basic expressions
author Adam Chlipala <adamc@hcoop.net>
date Sat, 26 Jan 2008 17:10:26 -0500
parents 5c3cc348e9e6
children d89477f07c1e
rev   line source
adamc@1 1 (* Copyright (c) 2008, Adam Chlipala
adamc@1 2 * All rights reserved.
adamc@1 3 *
adamc@1 4 * Redistribution and use in source and binary forms, with or without
adamc@1 5 * modification, are permitted provided that the following conditions are met:
adamc@1 6 *
adamc@1 7 * - Redistributions of source code must retain the above copyright notice,
adamc@1 8 * this list of conditions and the following disclaimer.
adamc@1 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@1 10 * this list of conditions and the following disclaimer in the documentation
adamc@1 11 * and/or other materials provided with the distribution.
adamc@1 12 * - The names of contributors may not be used to endorse or promote products
adamc@1 13 * derived from this software without specific prior written permission.
adamc@1 14 *
adamc@1 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@1 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@1 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@1 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@1 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@1 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@1 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@1 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@1 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@1 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@1 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@1 26 *)
adamc@1 27
adamc@1 28 (* Pretty-printing Laconic/Web *)
adamc@1 29
adamc@4 30 structure SourcePrint :> SOURCE_PRINT = struct
adamc@1 31
adamc@1 32 open Print.PD
adamc@1 33 open Print
adamc@1 34
adamc@4 35 open Source
adamc@1 36
adamc@1 37 fun p_kind' par (k, _) =
adamc@1 38 case k of
adamc@1 39 KType => string "Type"
adamc@1 40 | KArrow (k1, k2) => parenIf par (box [p_kind' true k1,
adamc@1 41 space,
adamc@1 42 string "->",
adamc@1 43 space,
adamc@1 44 p_kind k2])
adamc@1 45 | KName => string "Name"
adamc@1 46 | KRecord k => box [string "{", p_kind k, string "}"]
adamc@1 47
adamc@1 48 and p_kind k = p_kind' false k
adamc@1 49
adamc@1 50 fun p_explicitness e =
adamc@1 51 case e of
adamc@1 52 Explicit => string "::"
adamc@1 53 | Implicit => string ":::"
adamc@1 54
adamc@1 55 fun p_con' par (c, _) =
adamc@1 56 case c of
adamc@1 57 CAnnot (c, k) => box [string "(",
adamc@1 58 p_con c,
adamc@1 59 space,
adamc@1 60 string "::",
adamc@1 61 space,
adamc@1 62 p_kind k,
adamc@1 63 string ")"]
adamc@1 64
adamc@1 65 | TFun (t1, t2) => parenIf par (box [p_con' true t1,
adamc@1 66 space,
adamc@1 67 string "->",
adamc@1 68 space,
adamc@1 69 p_con t2])
adamc@1 70 | TCFun (e, x, k, c) => parenIf par (box [string x,
adamc@1 71 space,
adamc@1 72 p_explicitness e,
adamc@1 73 space,
adamc@1 74 p_kind k,
adamc@1 75 space,
adamc@1 76 string "->",
adamc@1 77 space,
adamc@1 78 p_con c])
adamc@1 79 | TRecord (CRecord xcs, _) => box [string "{",
adamc@1 80 p_list (fn (x, c) =>
adamc@1 81 box [p_con x,
adamc@1 82 space,
adamc@1 83 string ":",
adamc@1 84 space,
adamc@1 85 p_con c]) xcs,
adamc@1 86 string "}"]
adamc@1 87 | TRecord c => box [string "$",
adamc@1 88 p_con' true c]
adamc@1 89
adamc@1 90 | CVar s => string s
adamc@1 91 | CApp (c1, c2) => parenIf par (box [p_con c1,
adamc@1 92 space,
adamc@1 93 p_con' true c2])
adamc@8 94 | CAbs (x, k, c) => parenIf par (box [string "fn",
adamc@8 95 space,
adamc@8 96 string x,
adamc@8 97 space,
adamc@8 98 string "::",
adamc@8 99 space,
adamc@8 100 p_kind k,
adamc@8 101 space,
adamc@8 102 string "=>",
adamc@8 103 space,
adamc@8 104 p_con c])
adamc@1 105
adamc@1 106 | CName s => box [string "#", string s]
adamc@1 107
adamc@1 108 | CRecord xcs => box [string "[",
adamc@1 109 p_list (fn (x, c) =>
adamc@1 110 box [p_con x,
adamc@1 111 space,
adamc@1 112 string "=",
adamc@1 113 space,
adamc@1 114 p_con c]) xcs,
adamc@1 115 string "]"]
adamc@1 116 | CConcat (c1, c2) => parenIf par (box [p_con' true c1,
adamc@1 117 space,
adamc@1 118 string "++",
adamc@1 119 space,
adamc@1 120 p_con c2])
adamc@1 121
adamc@1 122 and p_con c = p_con' false c
adamc@1 123
adamc@8 124 fun p_exp' par (e, _) =
adamc@8 125 case e of
adamc@8 126 EAnnot (e, t) => box [string "(",
adamc@8 127 p_exp e,
adamc@8 128 space,
adamc@8 129 string ":",
adamc@8 130 space,
adamc@8 131 p_con t,
adamc@8 132 string ")"]
adamc@8 133
adamc@8 134 | EVar s => string s
adamc@8 135 | EApp (e1, e2) => parenIf par (box [p_exp e1,
adamc@8 136 space,
adamc@8 137 p_exp' true e2])
adamc@8 138 | EAbs (x, NONE, e) => parenIf par (box [string "fn",
adamc@8 139 space,
adamc@8 140 string x,
adamc@8 141 space,
adamc@8 142 string "=>",
adamc@8 143 space,
adamc@8 144 p_exp e])
adamc@8 145 | EAbs (x, SOME t, e) => parenIf par (box [string "fn",
adamc@8 146 space,
adamc@8 147 string x,
adamc@8 148 space,
adamc@8 149 string ":",
adamc@8 150 space,
adamc@8 151 p_con t,
adamc@8 152 space,
adamc@8 153 string "=>",
adamc@8 154 space,
adamc@8 155 p_exp e])
adamc@8 156 | ECApp (e, c) => parenIf par (box [p_exp e,
adamc@8 157 space,
adamc@8 158 string "[",
adamc@8 159 p_con c,
adamc@8 160 string "]"])
adamc@8 161 | ECAbs (exp, x, k, e) => parenIf par (box [string "fn",
adamc@8 162 space,
adamc@8 163 string x,
adamc@8 164 space,
adamc@8 165 p_explicitness exp,
adamc@8 166 space,
adamc@8 167 p_kind k,
adamc@8 168 space,
adamc@8 169 string "=>",
adamc@8 170 space,
adamc@8 171 p_exp e])
adamc@8 172
adamc@8 173 and p_exp e = p_exp' false e
adamc@8 174
adamc@1 175 fun p_decl ((d, _) : decl) =
adamc@1 176 case d of
adamc@1 177 DCon (x, NONE, c) => box [string "con",
adamc@1 178 space,
adamc@1 179 string x,
adamc@1 180 space,
adamc@1 181 string "=",
adamc@1 182 space,
adamc@1 183 p_con c]
adamc@1 184 | DCon (x, SOME k, c) => box [string "con",
adamc@1 185 space,
adamc@1 186 string x,
adamc@1 187 space,
adamc@1 188 string "::",
adamc@1 189 space,
adamc@1 190 p_kind k,
adamc@1 191 space,
adamc@1 192 string "=",
adamc@1 193 space,
adamc@1 194 p_con c]
adamc@8 195 | DVal (x, NONE, e) => box [string "val",
adamc@8 196 space,
adamc@8 197 string x,
adamc@8 198 space,
adamc@8 199 string "=",
adamc@8 200 space,
adamc@8 201 p_exp e]
adamc@8 202 | DVal (x, SOME t, e) => box [string "val",
adamc@8 203 space,
adamc@8 204 string x,
adamc@8 205 space,
adamc@8 206 string ":",
adamc@8 207 space,
adamc@8 208 p_con t,
adamc@8 209 space,
adamc@8 210 string "=",
adamc@8 211 space,
adamc@8 212 p_exp e]
adamc@1 213
adamc@1 214 val p_file = p_list_sep newline p_decl
adamc@1 215
adamc@1 216 end