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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 | LTYPE | VAL
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43 | TYPE | NAME
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44 | ARROW | LARROW | DARROW
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45 | FN | PLUSPLUS | DOLLAR
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46
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47 %nonterm
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48 file of decl list
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49 | decls of decl list
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50 | decl of decl
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51
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52 | kind of kind
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53 | kcolon of explicitness
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54
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55 | cexp of con
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56 | capps of con
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57 | cterm of con
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58 | ident of con
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59 | rcon of (con * con) list
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60 | rcone of (con * con) list
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61
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62 | eexp of exp
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63 | eapps of exp
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64 | eterm of exp
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65 | rexp of (con * exp) list
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66
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67 %verbose (* print summary of errors *)
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68 %pos int (* positions *)
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69 %start file
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70 %pure
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71 %eop EOF
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72 %noshift EOF
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73
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74 %name Lacweb
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75
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76 %nonassoc DARROW
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77 %nonassoc COLON
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78 %nonassoc DCOLON TCOLON
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79 %right COMMA
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80 %right ARROW LARROW
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81 %right PLUSPLUS
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82 %nonassoc DOLLAR
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83 %left DOT
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84
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85 %%
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86
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87 file : decls (decls)
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88
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89 decls : ([])
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90 | decl decls (decl :: decls)
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91
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92 decl : CON SYMBOL EQ cexp (DCon (SYMBOL, NONE, cexp), s (CONleft, cexpright))
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93 | CON SYMBOL DCOLON kind EQ cexp (DCon (SYMBOL, SOME kind, cexp), s (CONleft, cexpright))
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94 | LTYPE SYMBOL EQ cexp (DCon (SYMBOL, SOME (KType, s (LTYPEleft, cexpright)), cexp),
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95 s (LTYPEleft, cexpright))
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96 | VAL SYMBOL EQ eexp (DVal (SYMBOL, NONE, eexp), s (VALleft, eexpright))
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97 | VAL SYMBOL COLON cexp EQ eexp (DVal (SYMBOL, SOME cexp, eexp), s (VALleft, eexpright))
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98
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99 kind : TYPE (KType, s (TYPEleft, TYPEright))
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100 | NAME (KName, s (NAMEleft, NAMEright))
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101 | LBRACE kind RBRACE (KRecord kind, s (LBRACEleft, RBRACEright))
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102 | kind ARROW kind (KArrow (kind1, kind2), s (kind1left, kind2right))
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103 | LPAREN kind RPAREN (#1 kind, s (LPARENleft, RPARENright))
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104
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105 capps : cterm (cterm)
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106 | capps cterm (CApp (capps, cterm), s (cappsleft, ctermright))
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107
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108 cexp : capps (capps)
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109 | cexp ARROW cexp (TFun (cexp1, cexp2), s (cexp1left, cexp2right))
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110 | SYMBOL kcolon kind ARROW cexp (TCFun (kcolon, SYMBOL, kind, cexp), s (SYMBOLleft, cexpright))
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111
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112 | cexp PLUSPLUS cexp (CConcat (cexp1, cexp2), s (cexp1left, cexp1right))
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113
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114 | FN SYMBOL DCOLON kind DARROW cexp (CAbs (SYMBOL, kind, cexp), s (FNleft, cexpright))
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115
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116 | LPAREN cexp RPAREN DCOLON kind (CAnnot (cexp, kind), s (LPARENleft, kindright))
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117
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118 kcolon : DCOLON (Explicit)
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119 | TCOLON (Implicit)
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120
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121 cterm : LPAREN cexp RPAREN (#1 cexp, s (LPARENleft, RPARENright))
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122 | LBRACK rcon RBRACK (CRecord rcon, s (LBRACKleft, RBRACKright))
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123 | LBRACE rcone RBRACE (TRecord (CRecord rcone, s (LBRACEleft, RBRACEright)),
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124 s (LBRACEleft, RBRACEright))
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125 | DOLLAR cterm (TRecord cterm, s (DOLLARleft, ctermright))
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126 | HASH CSYMBOL (CName CSYMBOL, s (HASHleft, CSYMBOLright))
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127
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128 | SYMBOL (CVar SYMBOL, s (SYMBOLleft, SYMBOLright))
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129
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130 rcon : ([])
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131 | ident EQ cexp ([(ident, cexp)])
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132 | ident EQ cexp COMMA rcon ((ident, cexp) :: rcon)
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133
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134 rcone : ([])
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135 | ident COLON cexp ([(ident, cexp)])
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136 | ident COLON cexp COMMA rcone ((ident, cexp) :: rcone)
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137
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138 ident : CSYMBOL (CName CSYMBOL, s (CSYMBOLleft, CSYMBOLright))
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139 | SYMBOL (CVar SYMBOL, s (SYMBOLleft, SYMBOLright))
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140
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141 eapps : eterm (eterm)
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142 | eapps eterm (EApp (eapps, eterm), s (eappsleft, etermright))
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143 | eapps LBRACK cexp RBRACK (ECApp (eapps, cexp), s (eappsleft, RBRACKright))
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144
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145 eexp : eapps (eapps)
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146 | FN SYMBOL kcolon kind DARROW eexp (ECAbs (kcolon, SYMBOL, kind, eexp), s (FNleft, eexpright))
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147 | FN SYMBOL COLON cexp DARROW eexp (EAbs (SYMBOL, SOME cexp, eexp), s (FNleft, eexpright))
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148 | FN SYMBOL DARROW eexp (EAbs (SYMBOL, NONE, eexp), s (FNleft, eexpright))
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149
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150 | LPAREN eexp RPAREN DCOLON cexp (EAnnot (eexp, cexp), s (LPARENleft, cexpright))
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151 | eterm DOT ident (EField (eterm, ident), s (etermleft, identright))
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152
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153 eterm : LPAREN eexp RPAREN (#1 eexp, s (LPARENleft, RPARENright))
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154
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155 | SYMBOL (EVar SYMBOL, s (SYMBOLleft, SYMBOLright))
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156 | LBRACE rexp RBRACE (ERecord rexp, s (LBRACEleft, RBRACEright))
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157
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158 rexp : ([])
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159 | ident EQ eexp ([(ident, eexp)])
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160 | ident EQ eexp COMMA rexp ((ident, eexp) :: rexp)
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