1 (* Title: HOL/Tools/Sledgehammer/sledgehammer_tptp_format.ML |
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2 Author: Jia Meng, NICTA |
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3 Author: Jasmin Blanchette, TU Muenchen |
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4 |
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5 TPTP syntax. |
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6 *) |
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7 |
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8 signature SLEDGEHAMMER_TPTP_FORMAT = |
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9 sig |
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10 type kind = Metis_Clauses.kind |
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11 |
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12 datatype 'a fo_term = ATerm of 'a * 'a fo_term list |
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13 datatype quantifier = AForall | AExists |
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14 datatype connective = ANot | AAnd | AOr | AImplies | AIf | AIff | ANotIff |
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15 datatype ('a, 'b) formula = |
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16 AQuant of quantifier * 'a list * ('a, 'b) formula | |
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17 AConn of connective * ('a, 'b) formula list | |
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18 APred of 'b |
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19 |
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20 datatype 'a problem_line = Fof of string * kind * ('a, 'a fo_term) formula |
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21 type 'a problem = (string * 'a problem_line list) list |
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22 |
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23 val is_tptp_variable : string -> bool |
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24 val strings_for_tptp_problem : |
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25 (string * string problem_line list) list -> string list |
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26 val nice_tptp_problem : |
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27 bool -> ('a * (string * string) problem_line list) list |
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28 -> ('a * string problem_line list) list |
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29 * (string Symtab.table * string Symtab.table) option |
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30 end; |
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31 |
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32 structure Sledgehammer_TPTP_Format : SLEDGEHAMMER_TPTP_FORMAT = |
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33 struct |
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34 |
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35 open Sledgehammer_Util |
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36 |
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37 type kind = Metis_Clauses.kind |
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38 |
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39 (** ATP problem **) |
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40 |
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41 datatype 'a fo_term = ATerm of 'a * 'a fo_term list |
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42 datatype quantifier = AForall | AExists |
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43 datatype connective = ANot | AAnd | AOr | AImplies | AIf | AIff | ANotIff |
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44 datatype ('a, 'b) formula = |
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45 AQuant of quantifier * 'a list * ('a, 'b) formula | |
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46 AConn of connective * ('a, 'b) formula list | |
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47 APred of 'b |
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48 |
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49 datatype 'a problem_line = Fof of string * kind * ('a, 'a fo_term) formula |
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50 type 'a problem = (string * 'a problem_line list) list |
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51 |
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52 fun string_for_term (ATerm (s, [])) = s |
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53 | string_for_term (ATerm (s, ts)) = |
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54 if s = "equal" then space_implode " = " (map string_for_term ts) |
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55 else s ^ "(" ^ commas (map string_for_term ts) ^ ")" |
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56 fun string_for_quantifier AForall = "!" |
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57 | string_for_quantifier AExists = "?" |
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58 fun string_for_connective ANot = "~" |
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59 | string_for_connective AAnd = "&" |
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60 | string_for_connective AOr = "|" |
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61 | string_for_connective AImplies = "=>" |
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62 | string_for_connective AIf = "<=" |
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63 | string_for_connective AIff = "<=>" |
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64 | string_for_connective ANotIff = "<~>" |
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65 fun string_for_formula (AQuant (q, xs, phi)) = |
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66 string_for_quantifier q ^ "[" ^ commas xs ^ "]: " ^ |
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67 string_for_formula phi |
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68 | string_for_formula (AConn (ANot, [APred (ATerm ("equal", ts))])) = |
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69 space_implode " != " (map string_for_term ts) |
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70 | string_for_formula (AConn (c, [phi])) = |
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71 string_for_connective c ^ " " ^ string_for_formula phi |
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72 | string_for_formula (AConn (c, phis)) = |
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73 "(" ^ space_implode (" " ^ string_for_connective c ^ " ") |
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74 (map string_for_formula phis) ^ ")" |
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75 | string_for_formula (APred tm) = string_for_term tm |
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76 |
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77 fun string_for_problem_line (Fof (ident, kind, phi)) = |
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78 "fof(" ^ ident ^ ", " ^ |
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79 (case kind of Axiom => "axiom" | Conjecture => "conjecture") ^ ",\n" ^ |
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80 " (" ^ string_for_formula phi ^ ")).\n" |
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81 fun strings_for_tptp_problem problem = |
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82 "% This file was generated by Isabelle (most likely Sledgehammer)\n\ |
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83 \% " ^ timestamp () ^ "\n" :: |
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84 maps (fn (_, []) => [] |
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85 | (heading, lines) => |
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86 "\n% " ^ heading ^ " (" ^ Int.toString (length lines) ^ ")\n" :: |
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87 map string_for_problem_line lines) problem |
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88 |
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89 fun is_tptp_variable s = Char.isUpper (String.sub (s, 0)) |
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90 |
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91 |
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92 (** Nice names **) |
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93 |
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94 fun empty_name_pool readable_names = |
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95 if readable_names then SOME (Symtab.empty, Symtab.empty) else NONE |
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96 |
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97 fun pool_fold f xs z = pair z #> fold_rev (fn x => uncurry (f x)) xs |
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98 fun pool_map f xs = |
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99 pool_fold (fn x => fn ys => fn pool => f x pool |>> (fn y => y :: ys)) xs [] |
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100 |
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101 (* "equal" is reserved by some ATPs. "op" is also reserved, to avoid the |
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102 unreadable "op_1", "op_2", etc., in the problem files. *) |
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103 val reserved_nice_names = ["equal", "op"] |
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104 fun readable_name full_name s = |
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105 if s = full_name then |
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106 s |
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107 else |
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108 let |
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109 val s = s |> Long_Name.base_name |
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110 |> Name.desymbolize (Char.isUpper (String.sub (full_name, 0))) |
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111 in if member (op =) reserved_nice_names s then full_name else s end |
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112 |
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113 fun nice_name (full_name, _) NONE = (full_name, NONE) |
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114 | nice_name (full_name, desired_name) (SOME the_pool) = |
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115 case Symtab.lookup (fst the_pool) full_name of |
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116 SOME nice_name => (nice_name, SOME the_pool) |
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117 | NONE => |
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118 let |
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119 val nice_prefix = readable_name full_name desired_name |
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120 fun add j = |
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121 let |
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122 val nice_name = nice_prefix ^ |
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123 (if j = 0 then "" else "_" ^ Int.toString j) |
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124 in |
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125 case Symtab.lookup (snd the_pool) nice_name of |
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126 SOME full_name' => |
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127 if full_name = full_name' then (nice_name, the_pool) |
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128 else add (j + 1) |
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129 | NONE => |
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130 (nice_name, |
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131 (Symtab.update_new (full_name, nice_name) (fst the_pool), |
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132 Symtab.update_new (nice_name, full_name) (snd the_pool))) |
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133 end |
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134 in add 0 |> apsnd SOME end |
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135 |
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136 |
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137 fun nice_term (ATerm (name, ts)) = |
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138 nice_name name ##>> pool_map nice_term ts #>> ATerm |
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139 fun nice_formula (AQuant (q, xs, phi)) = |
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140 pool_map nice_name xs ##>> nice_formula phi |
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141 #>> (fn (xs, phi) => AQuant (q, xs, phi)) |
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142 | nice_formula (AConn (c, phis)) = |
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143 pool_map nice_formula phis #>> curry AConn c |
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144 | nice_formula (APred tm) = nice_term tm #>> APred |
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145 fun nice_problem_line (Fof (ident, kind, phi)) = |
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146 nice_formula phi #>> (fn phi => Fof (ident, kind, phi)) |
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147 fun nice_problem problem = |
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148 pool_map (fn (heading, lines) => |
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149 pool_map nice_problem_line lines #>> pair heading) problem |
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150 fun nice_tptp_problem readable_names problem = |
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151 nice_problem problem (empty_name_pool readable_names) |
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152 |
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153 end; |
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