## lustrec / src / types.ml @ 59294251

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1 | 0cbf0839 | ploc | (* ---------------------------------------------------------------------------- |
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2 | * SchedMCore - A MultiCore Scheduling Framework |
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3 | * Copyright (C) 2009-2011, ONERA, Toulouse, FRANCE - LIFL, Lille, FRANCE |
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4 | * |
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5 | * This file is part of Prelude |
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6 | * |
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7 | * Prelude is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU Lesser General Public License |
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9 | * as published by the Free Software Foundation ; either version 2 of |
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10 | * the License, or (at your option) any later version. |
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11 | * |
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12 | * Prelude is distributed in the hope that it will be useful, but |
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13 | * WITHOUT ANY WARRANTY ; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | * Lesser General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU Lesser General Public |
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18 | * License along with this program ; if not, write to the Free Software |
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19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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20 | * USA |
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21 | *---------------------------------------------------------------------------- *) |
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22 | |||

23 | (** Types definitions and a few utility functions on types. *) |
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24 | open Utils |
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25 | open Dimension |
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26 | |||

27 | type type_expr = |
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28 | {mutable tdesc: type_desc; |
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29 | tid: int} |
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30 | |||

31 | and type_desc = |
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32 | | Tconst of ident (* type constant *) |
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33 | | Tint |
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34 | | Treal |
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35 | | Tbool |
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36 | | Trat (* Actually unused for now. Only place where it can appear is |
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37 | in a clock declaration *) |
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38 | 59294251 | ploc | | Tclock of type_expr (* A type expression explicitely tagged as carrying a clock *) |

39 | 0cbf0839 | ploc | | Tarrow of type_expr * type_expr |

40 | | Ttuple of type_expr list |
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41 | | Tenum of ident list |
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42 | aa223e69 | xthirioux | | Tstruct of (ident * type_expr) list |

43 | 0cbf0839 | ploc | | Tarray of dim_expr * type_expr |

44 | | Tstatic of dim_expr * type_expr (* a type carried by a dimension expression *) |
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45 | | Tlink of type_expr (* During unification, make links instead of substitutions *) |
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46 | | Tvar (* Monomorphic type variable *) |
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47 | | Tunivar (* Polymorphic type variable *) |
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48 | |||

49 | type error = |
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50 | Unbound_value of ident |
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51 | | Already_bound of ident |
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52 | | Already_defined of ident |
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53 | | Undefined_var of (unit IMap.t) |
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54 | 0b78e972 | xthirioux | | Declared_but_undefined of ident |

55 | 0cbf0839 | ploc | | Unbound_type of ident |

56 | | Not_a_dimension |
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57 | | Not_a_constant |
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58 | 59294251 | ploc | | Assigned_constant of ident |

59 | 0cbf0839 | ploc | | WrongArity of int * int |

60 | 14d694c7 | xthirioux | | WrongMorphism of int * int |

61 | 0cbf0839 | ploc | | Type_clash of type_expr * type_expr |

62 | | Poly_imported_node of ident |
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63 | |||

64 | exception Unify of type_expr * type_expr |
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65 | exception Error of Location.t * error |
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66 | |||

67 | (* Pretty-print*) |
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68 | open Format |
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69 | aa223e69 | xthirioux | |

70 | let rec print_struct_ty_field fmt (label, ty) = |
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71 | fprintf fmt "%a : %a" pp_print_string label print_ty ty |
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72 | and print_ty fmt ty = |
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73 | 0cbf0839 | ploc | match ty.tdesc with |

74 | | Tvar -> |
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75 | fprintf fmt "_%s" (name_of_type ty.tid) |
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76 | | Tint -> |
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77 | fprintf fmt "int" |
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78 | | Treal -> |
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79 | fprintf fmt "real" |
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80 | | Tbool -> |
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81 | fprintf fmt "bool" |
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82 | | Tclock t -> |
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83 | fprintf fmt "%a clock" print_ty t |
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84 | | Tstatic (d, t) -> |
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85 | fprintf fmt "(%a:%a)" Dimension.pp_dimension d print_ty t |
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86 | | Tconst t -> |
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87 | fprintf fmt "%s" t |
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88 | | Trat -> |
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89 | fprintf fmt "rat" |
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90 | | Tarrow (ty1,ty2) -> |
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91 | f6fa97f9 | xthirioux | fprintf fmt "%a -> %a" print_ty ty1 print_ty ty2 |

92 | 0cbf0839 | ploc | | Ttuple tylist -> |

93 | fprintf fmt "(%a)" |
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94 | (Utils.fprintf_list ~sep:"*" print_ty) tylist |
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95 | | Tenum taglist -> |
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96 | aa223e69 | xthirioux | fprintf fmt "enum {%a }" |

97 | (Utils.fprintf_list ~sep:", " pp_print_string) taglist |
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98 | | Tstruct fieldlist -> |
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99 | fprintf fmt "struct {%a }" |
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100 | (Utils.fprintf_list ~sep:"; " print_struct_ty_field) fieldlist |
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101 | 0cbf0839 | ploc | | Tarray (e, ty) -> |

102 | fprintf fmt "%a^%a" print_ty ty Dimension.pp_dimension e |
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103 | | Tlink ty -> |
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104 | print_ty fmt ty |
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105 | | Tunivar -> |
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106 | fprintf fmt "'%s" (name_of_type ty.tid) |
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107 | |||

108 | aa223e69 | xthirioux | let rec print_node_struct_ty_field fmt (label, ty) = |

109 | fprintf fmt "%a : %a" pp_print_string label print_node_ty ty |
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110 | and print_node_ty fmt ty = |
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111 | 8b3afe43 | xthirioux | match ty.tdesc with |

112 | 0b78e972 | xthirioux | | Tvar -> begin |

113 | 66e38617 | xthirioux | (*Format.eprintf "DEBUG:Types.print_node@.";*) |

114 | 0b78e972 | xthirioux | fprintf fmt "_%s" (name_of_type ty.tid) |

115 | end |
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116 | 8b3afe43 | xthirioux | | Tint -> |

117 | fprintf fmt "int" |
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118 | | Treal -> |
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119 | fprintf fmt "real" |
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120 | | Tbool -> |
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121 | fprintf fmt "bool" |
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122 | | Tclock t -> |
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123 | 59294251 | ploc | fprintf fmt "%a clock" print_node_ty t |

124 | 8b3afe43 | xthirioux | | Tstatic (_, t) -> |

125 | fprintf fmt "%a" print_node_ty t |
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126 | | Tconst t -> |
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127 | fprintf fmt "%s" t |
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128 | | Trat -> |
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129 | fprintf fmt "rat" |
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130 | | Tarrow (ty1,ty2) -> |
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131 | 59294251 | ploc | fprintf fmt "%a -> %a" print_node_ty ty1 print_node_ty ty2 |

132 | 8b3afe43 | xthirioux | | Ttuple tylist -> |

133 | fprintf fmt "(%a)" |
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134 | 59294251 | ploc | (Utils.fprintf_list ~sep:"*" print_node_ty) tylist |

135 | 8b3afe43 | xthirioux | | Tenum taglist -> |

136 | aa223e69 | xthirioux | fprintf fmt "enum {%a }" |

137 | (Utils.fprintf_list ~sep:", " pp_print_string) taglist |
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138 | | Tstruct fieldlist -> |
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139 | fprintf fmt "struct {%a }" |
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140 | (Utils.fprintf_list ~sep:"; " print_node_struct_ty_field) fieldlist |
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141 | 8b3afe43 | xthirioux | | Tarray (e, ty) -> |

142 | 59294251 | ploc | fprintf fmt "%a^%a" print_node_ty ty Dimension.pp_dimension e |

143 | 8b3afe43 | xthirioux | | Tlink ty -> |

144 | 59294251 | ploc | print_node_ty fmt ty |

145 | 8b3afe43 | xthirioux | | Tunivar -> |

146 | fprintf fmt "'%s" (name_of_type ty.tid) |
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147 | |||

148 | 0cbf0839 | ploc | let pp_error fmt = function |

149 | | Unbound_value id -> |
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150 | fprintf fmt "Unknown value %s@." id |
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151 | | Unbound_type id -> |
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152 | fprintf fmt "Unknown type %s@." id |
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153 | | Already_bound id -> |
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154 | fprintf fmt "%s is already declared@." id |
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155 | | Already_defined id -> |
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156 | fprintf fmt "Multiple definitions of variable %s@." id |
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157 | | Not_a_constant -> |
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158 | fprintf fmt "This expression is not a constant@." |
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159 | 59294251 | ploc | | Assigned_constant id -> |

160 | fprintf fmt "The constant %s cannot be assigned@." id |
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161 | 0cbf0839 | ploc | | Not_a_dimension -> |

162 | fprintf fmt "This expression is not a valid dimension@." |
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163 | | WrongArity (ar1, ar2) -> |
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164 | fprintf fmt "Expecting %d argument(s), found %d@." ar1 ar2 |
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165 | 14d694c7 | xthirioux | | WrongMorphism (ar1, ar2) -> |

166 | fprintf fmt "Expecting %d argument(s) for homomorphic extension, found %d@." ar1 ar2 |
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167 | 0cbf0839 | ploc | | Undefined_var vmap -> |

168 | fprintf fmt "No definition provided for variable(s): %a@." |
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169 | (Utils.fprintf_list ~sep:"," pp_print_string) |
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170 | (fst (Utils.list_of_imap vmap)) |
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171 | 0b78e972 | xthirioux | | Declared_but_undefined id -> |

172 | fprintf fmt "Node %s is declared but not defined@." id |
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173 | 0cbf0839 | ploc | | Type_clash (ty1,ty2) -> |

174 | Utils.reset_names (); |
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175 | fprintf fmt "Expected type %a, got type %a@." print_ty ty1 print_ty ty2 |
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176 | | Poly_imported_node id -> |
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177 | fprintf fmt "Imported nodes cannot have a polymorphic type@." |
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178 | |||

179 | |||

180 | let new_id = ref (-1) |
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181 | |||

182 | let new_ty desc = |
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183 | incr new_id; {tdesc = desc; tid = !new_id } |
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184 | |||

185 | let new_var () = |
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186 | new_ty Tvar |
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187 | |||

188 | let new_univar () = |
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189 | new_ty Tunivar |
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190 | |||

191 | let rec repr = |
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192 | function |
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193 | {tdesc = Tlink t'} -> |
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194 | repr t' |
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195 | | t -> t |
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196 | |||

197 | let get_static_value ty = |
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198 | aa223e69 | xthirioux | match (repr ty).tdesc with |

199 | | Tstatic (d, _) -> Some d |
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200 | | _ -> None |
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201 | |||

202 | let get_field_type ty label = |
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203 | match (repr ty).tdesc with |
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204 | | Tstruct fl -> (try Some (List.assoc label fl) with Not_found -> None) |
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205 | | _ -> None |
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206 | 0cbf0839 | ploc | |

207 | 59294251 | ploc | let is_numeric_type ty = |

208 | match (repr ty).tdesc with |
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209 | | Tint |
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210 | | Treal -> true |
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211 | | _ -> false |
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212 | |||

213 | let is_bool_type ty = |
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214 | match (repr ty).tdesc with |
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215 | | Tbool -> true |
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216 | | _ -> false |
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217 | |||

218 | let get_clock_base_type ty = |
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219 | c518d082 | xthirioux | match (repr ty).tdesc with |

220 | 59294251 | ploc | | Tclock ty -> Some ty |

221 | | _ -> None |
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222 | c518d082 | xthirioux | |

223 | 0cbf0839 | ploc | let rec is_dimension_type ty = |

224 | match (repr ty).tdesc with |
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225 | | Tint |
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226 | | Tbool -> true |
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227 | | Tclock ty' |
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228 | | Tstatic (_, ty') -> is_dimension_type ty' |
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229 | | _ -> false |
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230 | |||

231 | 14d694c7 | xthirioux | let dynamic_type ty = |

232 | 0cbf0839 | ploc | let ty = repr ty in |

233 | match ty.tdesc with |
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234 | | Tstatic (_, ty') -> ty' |
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235 | | _ -> ty |
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236 | |||

237 | 14d694c7 | xthirioux | let is_tuple_type ty = |

238 | match (repr ty).tdesc with |
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239 | | Ttuple _ -> true |
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240 | | _ -> false |
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241 | |||

242 | let rec is_nested_tuple_type ty = |
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243 | match (repr ty).tdesc with |
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244 | | Ttuple tl -> List.exists is_tuple_type tl |
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245 | | _ -> false |
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246 | |||

247 | 0cbf0839 | ploc | let map_tuple_type f ty = |

248 | let ty = dynamic_type ty in |
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249 | match ty.tdesc with |
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250 | | (Ttuple ty_list) -> { ty with tdesc = Ttuple (List.map f ty_list) } |
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251 | | _ -> f ty |
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252 | 51768260 | xthirioux | |

253 | 14d694c7 | xthirioux | let is_struct_type ty = |

254 | 51768260 | xthirioux | match (repr ty).tdesc with |

255 | | Tstruct _ -> true |
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256 | | _ -> false |
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257 | |||

258 | 0cbf0839 | ploc | let rec is_array_type ty = |

259 | match (repr ty).tdesc with |
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260 | | Tarray _ -> true |
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261 | 51768260 | xthirioux | | Tstatic (_, ty') -> is_array_type ty' (* looks strange !? *) |

262 | 0cbf0839 | ploc | | _ -> false |

263 | |||

264 | let array_type_dimension ty = |
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265 | match (dynamic_type ty).tdesc with |
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266 | | Tarray (d, _) -> d |
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267 | | _ -> assert false |
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268 | |||

269 | let rec array_type_multi_dimension ty = |
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270 | match (dynamic_type ty).tdesc with |
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271 | | Tarray (d, ty') -> d :: array_type_multi_dimension ty' |
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272 | | _ -> [] |
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273 | |||

274 | let array_element_type ty = |
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275 | match (dynamic_type ty).tdesc with |
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276 | | Tarray (_, ty') -> ty' |
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277 | | _ -> assert false |
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278 | |||

279 | let rec array_base_type ty = |
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280 | let ty = repr ty in |
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281 | match ty.tdesc with |
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282 | | Tarray (_, ty') |
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283 | | Tstatic (_, ty') -> array_base_type ty' |
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284 | | _ -> ty |
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285 | |||

286 | 51768260 | xthirioux | let is_address_type ty = |

287 | is_array_type ty || is_struct_type ty |
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288 | |||

289 | 0cbf0839 | ploc | let rec is_generic_type ty = |

290 | match (dynamic_type ty).tdesc with |
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291 | | Tarray (d, ty') -> |
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292 | (not (Dimension.is_dimension_const d)) || (is_generic_type ty') |
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293 | | _ -> false |
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294 | |||

295 | (** Splits [ty] into the [lhs,rhs] of an arrow type. Expects an arrow type |
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296 | (ensured by language syntax) *) |
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297 | let rec split_arrow ty = |
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298 | match (repr ty).tdesc with |
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299 | | Tarrow (tin,tout) -> tin,tout |
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300 | | Tstatic (_, ty') -> split_arrow ty' |
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301 | (* Functions are not first order, I don't think the var case |
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302 | needs to be considered here *) |
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303 | 5b5625e1 | ploc | | _ -> Format.eprintf "type %a is not a map@.Unable to split@.@?" print_ty ty; assert false |

304 | 0cbf0839 | ploc | |

305 | (** Returns the type corresponding to a type list. *) |
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306 | let type_of_type_list tyl = |
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307 | if (List.length tyl) > 1 then |
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308 | new_ty (Ttuple tyl) |
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309 | else |
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310 | List.hd tyl |
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311 | |||

312 | let type_list_of_type ty = |
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313 | match (repr ty).tdesc with |
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314 | | Ttuple tl -> tl |
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315 | | _ -> [ty] |
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316 | |||

317 | (** [is_polymorphic ty] returns true if [ty] is polymorphic. *) |
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318 | let rec is_polymorphic ty = |
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319 | match ty.tdesc with |
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320 | | Tenum _ | Tvar | Tint | Treal | Tbool | Trat | Tconst _ -> false |
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321 | | Tclock ty -> is_polymorphic ty |
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322 | | Tarrow (ty1,ty2) -> (is_polymorphic ty1) || (is_polymorphic ty2) |
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323 | | Ttuple tl -> List.exists (fun t -> is_polymorphic t) tl |
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324 | aa223e69 | xthirioux | | Tstruct fl -> List.exists (fun (_, t) -> is_polymorphic t) fl |

325 | 0cbf0839 | ploc | | Tlink t' -> is_polymorphic t' |

326 | | Tarray (d, ty) |
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327 | | Tstatic (d, ty) -> Dimension.is_polymorphic d || is_polymorphic ty |
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328 | | Tunivar -> true |
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329 | |||

330 | |||

331 | let mktyptuple nb typ = |
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332 | let array = Array.make nb typ in |
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333 | Ttuple (Array.to_list array) |
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334 | |||

335 | |||

336 | (* Local Variables: *) |
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337 | (* compile-command:"make -C .." *) |
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338 | (* End: *) |