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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 (* Grammar for Laconic/Web programs *)
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29
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30 open Source
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31
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32 val s = ErrorMsg.spanOf
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33
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34 %%
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35 %header (functor LacwebLrValsFn(structure Token : TOKEN))
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36
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37 %term
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38 EOF
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39 | SYMBOL of string | CSYMBOL of string
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40 | LPAREN | RPAREN | LBRACK | RBRACK | LBRACE | RBRACE
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41 | EQ | COMMA | COLON | DCOLON | TCOLON | DOT | HASH
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42 | CON | TYPE | NAME
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43 | ARROW | LARROW | DARROW
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44 | FN | PLUSPLUS | DOLLAR
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45
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46 %nonterm
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47 file of decl list
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48 | decls of decl list
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49 | decl of decl
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50
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51 | kind of kind
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52 | kcolon of explicitness
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53
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54 | cexp of con
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55 | capps of con
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56 | cterm of con
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57 | ident of con
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58 | rcon of (con * con) list
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59 | rcone of (con * con) list
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60
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61 %verbose (* print summary of errors *)
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62 %pos int (* positions *)
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63 %start file
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64 %pure
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65 %eop EOF
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66 %noshift EOF
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67
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68 %name Lacweb
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69
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70 %nonassoc DARROW
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71 %nonassoc COLON
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72 %right COMMA
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73 %right ARROW LARROW
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74 %right PLUSPLUS
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75 %nonassoc DOLLAR
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76 %left DOT
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77
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78 %%
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79
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80 file : decls (decls)
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81
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82 decls : ([])
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83 | decl decls (decl :: decls)
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84
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85 decl : CON SYMBOL EQ cexp (DCon (SYMBOL, NONE, cexp), s (CONleft, cexpright))
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86 | CON SYMBOL DCOLON kind EQ cexp (DCon (SYMBOL, SOME kind, cexp), s (CONleft, cexpright))
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87
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88 kind : TYPE (KType, s (TYPEleft, TYPEright))
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89 | NAME (KName, s (NAMEleft, NAMEright))
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90 | LBRACE kind RBRACE (KRecord kind, s (LBRACEleft, RBRACEright))
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91 | kind ARROW kind (KArrow (kind1, kind2), s (kind1left, kind2right))
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92 | LPAREN kind RPAREN (#1 kind, s (LPARENleft, RPARENright))
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93
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94 capps : cterm (cterm)
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95 | capps cterm (CApp (capps, cterm), s (cappsleft, ctermright))
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96
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97 cexp : capps (capps)
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98 | cexp ARROW cexp (TFun (cexp1, cexp2), s (cexp1left, cexp2right))
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99 | SYMBOL kcolon kind ARROW cexp (TCFun (kcolon, SYMBOL, kind, cexp), s (SYMBOLleft, cexpright))
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100
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101 | cexp PLUSPLUS cexp (CConcat (cexp1, cexp2), s (cexp1left, cexp1right))
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102
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103 | FN SYMBOL kcolon kind DARROW cexp (CAbs (kcolon, SYMBOL, kind, cexp), s (FNleft, cexpright))
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104
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105 kcolon : DCOLON (Explicit)
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106 | TCOLON (Implicit)
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107
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108 cterm : LPAREN cexp RPAREN (#1 cexp, s (LPARENleft, RPARENright))
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109 | LBRACK rcon RBRACK (CRecord rcon, s (LBRACKleft, RBRACKright))
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110 | LBRACE rcone RBRACE (TRecord (CRecord rcone, s (LBRACEleft, RBRACEright)),
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111 s (LBRACEleft, RBRACEright))
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112 | DOLLAR cterm (TRecord cterm, s (DOLLARleft, ctermright))
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113 | HASH CSYMBOL (CName CSYMBOL, s (HASHleft, CSYMBOLright))
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114
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115 | SYMBOL (CVar SYMBOL, s (SYMBOLleft, SYMBOLright))
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116
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117 rcon : ([])
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118 | ident EQ cexp ([(ident, cexp)])
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119 | ident EQ cexp COMMA rcon ((ident, cexp) :: rcon)
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120
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121 rcone : ([])
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122 | ident COLON cexp ([(ident, cexp)])
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123 | ident COLON cexp COMMA rcone ((ident, cexp) :: rcone)
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124
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125 ident : CSYMBOL (CName CSYMBOL, s (CSYMBOLleft, CSYMBOLright))
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126 | SYMBOL (CVar SYMBOL, s (SYMBOLleft, SYMBOLright))
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