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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 | STRING of string | INT of Int64.int | FLOAT of Real64.real
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40 | SYMBOL of string | CSYMBOL of string
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41 | LPAREN | RPAREN | LBRACK | RBRACK | LBRACE | RBRACE
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42 | EQ | COMMA | COLON | DCOLON | TCOLON | DOT | HASH | UNDER | UNDERUNDER
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43 | CON | LTYPE | VAL | FOLD | UNIT | KUNIT
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44 | TYPE | NAME
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45 | ARROW | LARROW | DARROW
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46 | FN | PLUSPLUS | DOLLAR
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47 | STRUCTURE | SIGNATURE | STRUCT | SIG | END | FUNCTOR | WHERE | EXTERN | INCLUDE | OPEN
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48
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49 %nonterm
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50 file of decl list
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51 | decls of decl list
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52 | decl of decl
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53
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54 | sgn of sgn
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55 | sgntm of sgn
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56 | sgi of sgn_item
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57 | sgis of sgn_item list
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58
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59 | str of str
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60
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61 | kind of kind
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62 | kcolon of explicitness
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63
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64 | path of string list * string
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65 | spath of str
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66 | mpath of string list
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67
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68 | cexp of con
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69 | capps of con
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70 | cterm of con
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71 | ident of con
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72 | rcon of (con * con) list
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73 | rconn of (con * con) list
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74 | rcone of (con * con) list
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75
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76 | eexp of exp
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77 | eapps of exp
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78 | eterm of exp
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79 | rexp of (con * exp) list
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80
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81 %verbose (* print summary of errors *)
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82 %pos int (* positions *)
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83 %start file
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84 %pure
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85 %eop EOF
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86 %noshift EOF
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87
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88 %name Lacweb
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89
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90 %nonassoc DARROW
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91 %nonassoc COLON
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92 %nonassoc DCOLON TCOLON
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93 %right COMMA
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94 %right ARROW LARROW
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95 %right PLUSPLUS
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96 %nonassoc DOLLAR
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97 %left DOT
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98
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99 %%
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100
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101 file : decls (decls)
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102 | SIG sgis ([(DSgn ("?", (SgnConst sgis, s (SIGleft, sgisright))),
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103 s (SIGleft, sgisright))])
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104
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105 decls : ([])
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106 | decl decls (decl :: decls)
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107
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108 decl : CON SYMBOL EQ cexp (DCon (SYMBOL, NONE, cexp), s (CONleft, cexpright))
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109 | CON SYMBOL DCOLON kind EQ cexp (DCon (SYMBOL, SOME kind, cexp), s (CONleft, cexpright))
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110 | LTYPE SYMBOL EQ cexp (DCon (SYMBOL, SOME (KType, s (LTYPEleft, cexpright)), cexp),
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111 s (LTYPEleft, cexpright))
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112 | VAL SYMBOL EQ eexp (DVal (SYMBOL, NONE, eexp), s (VALleft, eexpright))
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113 | VAL SYMBOL COLON cexp EQ eexp (DVal (SYMBOL, SOME cexp, eexp), s (VALleft, eexpright))
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114
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115 | SIGNATURE CSYMBOL EQ sgn (DSgn (CSYMBOL, sgn), s (SIGNATUREleft, sgnright))
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116 | STRUCTURE CSYMBOL EQ str (DStr (CSYMBOL, NONE, str), s (STRUCTUREleft, strright))
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117 | STRUCTURE CSYMBOL COLON sgn EQ str (DStr (CSYMBOL, SOME sgn, str), s (STRUCTUREleft, strright))
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118 | FUNCTOR CSYMBOL LPAREN CSYMBOL COLON sgn RPAREN EQ str
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119 (DStr (CSYMBOL1, NONE,
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120 (StrFun (CSYMBOL2, sgn1, NONE, str), s (FUNCTORleft, strright))),
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121 s (FUNCTORleft, strright))
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122 | FUNCTOR CSYMBOL LPAREN CSYMBOL COLON sgn RPAREN COLON sgn EQ str
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123 (DStr (CSYMBOL1, NONE,
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124 (StrFun (CSYMBOL2, sgn1, SOME sgn2, str), s (FUNCTORleft, strright))),
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125 s (FUNCTORleft, strright))
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126 | EXTERN STRUCTURE CSYMBOL COLON sgn (DFfiStr (CSYMBOL, sgn), s (EXTERNleft, sgnright))
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127 | OPEN mpath (case mpath of
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128 [] => raise Fail "Impossible mpath parse [1]"
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129 | m :: ms => (DOpen (m, ms), s (OPENleft, mpathright)))
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130
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131 sgn : sgntm (sgntm)
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132 | FUNCTOR LPAREN CSYMBOL COLON sgn RPAREN COLON sgn
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133 (SgnFun (CSYMBOL, sgn1, sgn2), s (FUNCTORleft, sgn2right))
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134
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135 sgntm : SIG sgis END (SgnConst sgis, s (SIGleft, ENDright))
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136 | mpath (case mpath of
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137 [] => raise Fail "Impossible mpath parse [2]"
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138 | [x] => SgnVar x
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139 | m :: ms => SgnProj (m,
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140 List.take (ms, length ms - 1),
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141 List.nth (ms, length ms - 1)),
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142 s (mpathleft, mpathright))
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143 | sgntm WHERE CON SYMBOL EQ cexp (SgnWhere (sgntm, SYMBOL, cexp), s (sgntmleft, cexpright))
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144 | sgntm WHERE LTYPE SYMBOL EQ cexp(SgnWhere (sgntm, SYMBOL, cexp), s (sgntmleft, cexpright))
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145 | LPAREN sgn RPAREN (sgn)
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146
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147 sgi : CON SYMBOL DCOLON kind (SgiConAbs (SYMBOL, kind), s (CONleft, kindright))
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148 | LTYPE SYMBOL (SgiConAbs (SYMBOL, (KType, s (LTYPEleft, SYMBOLright))),
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149 s (LTYPEleft, SYMBOLright))
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150 | CON SYMBOL EQ cexp (SgiCon (SYMBOL, NONE, cexp), s (CONleft, cexpright))
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151 | CON SYMBOL DCOLON kind EQ cexp (SgiCon (SYMBOL, SOME kind, cexp), s (CONleft, cexpright))
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152 | LTYPE SYMBOL EQ cexp (SgiCon (SYMBOL, SOME (KType, s (LTYPEleft, cexpright)), cexp),
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153 s (LTYPEleft, cexpright))
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154 | VAL SYMBOL COLON cexp (SgiVal (SYMBOL, cexp), s (VALleft, cexpright))
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155
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156 | STRUCTURE CSYMBOL COLON sgn (SgiStr (CSYMBOL, sgn), s (STRUCTUREleft, sgnright))
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157 | SIGNATURE CSYMBOL EQ sgn (SgiSgn (CSYMBOL, sgn), s (SIGNATUREleft, sgnright))
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158 | FUNCTOR CSYMBOL LPAREN CSYMBOL COLON sgn RPAREN COLON sgn
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159 (SgiStr (CSYMBOL1,
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160 (SgnFun (CSYMBOL2, sgn1, sgn2), s (FUNCTORleft, sgn2right))),
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161 s (FUNCTORleft, sgn2right))
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162 | INCLUDE sgn (SgiInclude sgn, s (INCLUDEleft, sgnright))
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163
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164 sgis : ([])
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165 | sgi sgis (sgi :: sgis)
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166
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167 str : STRUCT decls END (StrConst decls, s (STRUCTleft, ENDright))
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168 | spath (spath)
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169 | FUNCTOR LPAREN CSYMBOL COLON sgn RPAREN DARROW str
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170 (StrFun (CSYMBOL, sgn, NONE, str), s (FUNCTORleft, strright))
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171 | FUNCTOR LPAREN CSYMBOL COLON sgn RPAREN COLON sgn DARROW str
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172 (StrFun (CSYMBOL, sgn1, SOME sgn2, str), s (FUNCTORleft, strright))
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173 | spath LPAREN str RPAREN (StrApp (spath, str), s (spathleft, RPARENright))
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174
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175 spath : CSYMBOL (StrVar CSYMBOL, s (CSYMBOLleft, CSYMBOLright))
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176 | spath DOT CSYMBOL (StrProj (spath, CSYMBOL), s (spathleft, CSYMBOLright))
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177
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178 kind : TYPE (KType, s (TYPEleft, TYPEright))
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179 | NAME (KName, s (NAMEleft, NAMEright))
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180 | LBRACE kind RBRACE (KRecord kind, s (LBRACEleft, RBRACEright))
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181 | kind ARROW kind (KArrow (kind1, kind2), s (kind1left, kind2right))
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182 | LPAREN kind RPAREN (#1 kind, s (LPARENleft, RPARENright))
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183 | KUNIT (KUnit, s (KUNITleft, KUNITright))
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184 | UNDERUNDER (KWild, s (UNDERUNDERleft, UNDERUNDERright))
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185
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186 capps : cterm (cterm)
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187 | capps cterm (CApp (capps, cterm), s (cappsleft, ctermright))
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188
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189 cexp : capps (capps)
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190 | cexp ARROW cexp (TFun (cexp1, cexp2), s (cexp1left, cexp2right))
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191 | SYMBOL kcolon kind ARROW cexp (TCFun (kcolon, SYMBOL, kind, cexp), s (SYMBOLleft, cexpright))
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192
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193 | cexp PLUSPLUS cexp (CConcat (cexp1, cexp2), s (cexp1left, cexp1right))
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194
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195 | FN SYMBOL DARROW cexp (CAbs (SYMBOL, NONE, cexp), s (FNleft, cexpright))
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196 | FN SYMBOL DCOLON kind DARROW cexp (CAbs (SYMBOL, SOME kind, cexp), s (FNleft, cexpright))
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197
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198 | LPAREN cexp RPAREN DCOLON kind (CAnnot (cexp, kind), s (LPARENleft, kindright))
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199
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200 | UNDER DCOLON kind (CWild kind, s (UNDERleft, UNDERright))
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201
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202 kcolon : DCOLON (Explicit)
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203 | TCOLON (Implicit)
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204
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205 path : SYMBOL ([], SYMBOL)
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206 | CSYMBOL DOT path (let val (ms, x) = path in (CSYMBOL :: ms, x) end)
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207
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208 mpath : CSYMBOL ([CSYMBOL])
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209 | CSYMBOL DOT mpath (CSYMBOL :: mpath)
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210
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211 cterm : LPAREN cexp RPAREN (#1 cexp, s (LPARENleft, RPARENright))
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212 | LBRACK rcon RBRACK (CRecord rcon, s (LBRACKleft, RBRACKright))
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213 | LBRACK rconn RBRACK (CRecord rconn, s (LBRACKleft, RBRACKright))
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214 | LBRACE rcone RBRACE (TRecord (CRecord rcone, s (LBRACEleft, RBRACEright)),
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215 s (LBRACEleft, RBRACEright))
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216 | DOLLAR cterm (TRecord cterm, s (DOLLARleft, ctermright))
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217 | HASH CSYMBOL (CName CSYMBOL, s (HASHleft, CSYMBOLright))
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218
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219 | path (CVar path, s (pathleft, pathright))
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220 | UNDER (CWild (KWild, s (UNDERleft, UNDERright)), s (UNDERleft, UNDERright))
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221 | FOLD (CFold, s (FOLDleft, FOLDright))
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222 | UNIT (CUnit, s (UNITleft, UNITright))
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223
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224 rcon : ([])
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225 | ident EQ cexp ([(ident, cexp)])
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226 | ident EQ cexp COMMA rcon ((ident, cexp) :: rcon)
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227
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228 rconn : ident ([(ident, (CUnit, s (identleft, identright)))])
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229 | ident COMMA rconn ((ident, (CUnit, s (identleft, identright))) :: rconn)
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230
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231 rcone : ([])
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232 | ident COLON cexp ([(ident, cexp)])
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233 | ident COLON cexp COMMA rcone ((ident, cexp) :: rcone)
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234
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235 ident : CSYMBOL (CName CSYMBOL, s (CSYMBOLleft, CSYMBOLright))
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236 | SYMBOL (CVar ([], SYMBOL), s (SYMBOLleft, SYMBOLright))
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237
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238 eapps : eterm (eterm)
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239 | eapps eterm (EApp (eapps, eterm), s (eappsleft, etermright))
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240 | eapps LBRACK cexp RBRACK (ECApp (eapps, cexp), s (eappsleft, RBRACKright))
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241
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242 eexp : eapps (eapps)
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243 | FN SYMBOL kcolon kind DARROW eexp (ECAbs (kcolon, SYMBOL, kind, eexp), s (FNleft, eexpright))
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244 | FN SYMBOL COLON cexp DARROW eexp (EAbs (SYMBOL, SOME cexp, eexp), s (FNleft, eexpright))
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245 | FN SYMBOL DARROW eexp (EAbs (SYMBOL, NONE, eexp), s (FNleft, eexpright))
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246
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247 | LPAREN eexp RPAREN DCOLON cexp (EAnnot (eexp, cexp), s (LPARENleft, cexpright))
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248 | eterm DOT ident (EField (eterm, ident), s (etermleft, identright))
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249
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250 eterm : LPAREN eexp RPAREN (#1 eexp, s (LPARENleft, RPARENright))
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251
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252 | path (EVar path, s (pathleft, pathright))
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253 | LBRACE rexp RBRACE (ERecord rexp, s (LBRACEleft, RBRACEright))
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254
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255 | INT (EPrim (Prim.Int INT), s (INTleft, INTright))
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256 | FLOAT (EPrim (Prim.Float FLOAT), s (FLOATleft, FLOATright))
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257 | STRING (EPrim (Prim.String STRING), s (STRINGleft, STRINGright))
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258
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259 | FOLD (EFold, s (FOLDleft, FOLDright))
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260
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261 rexp : ([])
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262 | ident EQ eexp ([(ident, eexp)])
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263 | ident EQ eexp COMMA rexp ((ident, eexp) :: rexp)
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