compiler/src/lib/tiger/tiger_error.ml

   1 module Abs = Tiger_absyn
   2 module Pos = Tiger_position
   3 module Sym = Tiger_symbol
   4 module Typ = Tiger_env_type
   5
   6 type t =
   7   | Invalid_syntax    of Pos.t
   8   | Unknown_id        of {id    : Sym.t; pos : Pos.t}
   9   | Unknown_type      of {ty_id : Sym.t; pos : Pos.t}
  10   | Id_is_a_function  of {id    : Sym.t; pos : Pos.t}
  11   | Id_not_a_function of {id    : Sym.t; pos : Pos.t}
  12   | No_such_field_in_record of {field : Sym.t; record : Typ.t; pos : Pos.t}
  13   | Exp_not_a_record  of {ty    : Typ.t; pos : Pos.t}
  14   | Exp_not_an_array  of {ty    : Typ.t; pos : Pos.t}
  15   | Wrong_type of
  16       { expected : Typ.t
  17       ; given    : Typ.t
  18       ; pos      : Pos.t
  19       }
  20   | Wrong_type_of_expression_in_var_dec of
  21       { var_id   : Sym.t
  22       ; expected : Typ.t
  23       ; given    : Typ.t
  24       ; pos      : Pos.t
  25       }
  26   | Wrong_type_used_as_record of
  27       { ty_id    : Sym.t
  28       ; ty       : Typ.t
  29       ; pos      : Pos.t
  30       }
  31   | Wrong_type_used_as_array of
  32       { ty_id    : Sym.t
  33       ; ty       : Typ.t
  34       ; pos      : Pos.t
  35       }
  36   | Wrong_type_of_field_value of
  37       { field_id : Sym.t
  38       ; expected : Typ.t
  39       ; given    : Typ.t
  40       ; pos      : Pos.t
  41       }
  42   | Wrong_type_of_arg of
  43       { func     : Sym.t
  44       ; expected : Typ.t
  45       ; given    : Typ.t
  46       ; pos      : Pos.t
  47       }
  48   | Wrong_number_of_args of
  49       { func     : Sym.t
  50       ; expected : int
  51       ; given    : int
  52       ; pos      : Pos.t
  53       }
  54   | Invalid_operand_type of
  55       { oper  : Abs.oper
  56       ; valid : string list
  57       ; given : Typ.t
  58       ; pos   : Pos.t
  59       }
  60   | Different_operand_types of
  61       { oper  : Abs.oper
  62       ; left  : Typ.t
  63       ; right : Typ.t
  64       ; pos   : Pos.t
  65       }
  66
  67 exception T of t
  68
  69 let raise t =
  70   raise (T t)
  71
  72 let to_string =
  73   let s = Printf.sprintf in
  74   function
  75   | Invalid_syntax pos ->
  76       s "Invalid syntax in %s" (Pos.to_string pos)
  77   | Unknown_id  {id; pos} ->
  78       s "Unknown identifier %S in %s" (Sym.to_string id) (Pos.to_string pos)
  79   | Unknown_type {ty_id; pos} ->
  80       s "Unknown type %S in %s" (Sym.to_string ty_id) (Pos.to_string pos)
  81   | Id_is_a_function {id; pos} ->
  82       s "Identifier %S is a function, it cannot be used as a variable in %s"
  83         (Sym.to_string id) (Pos.to_string pos)
  84   | Id_not_a_function {id; pos} ->
  85       s "Identifier %S is not a function, it cannot be called in %s"
  86         (Sym.to_string id) (Pos.to_string pos)
  87   | No_such_field_in_record {field; record; pos} ->
  88       s "No field %S in record %S in %s"
  89         (Sym.to_string field) (Typ.to_string record) (Pos.to_string pos)
  90   | Exp_not_a_record {ty; pos} ->
  91       s ( "The expression of type %S is not a record, it cannot be"
  92         ^^"accessed in %s")
  93         (Typ.to_string ty) (Pos.to_string pos)
  94   | Exp_not_an_array {ty; pos} ->
  95       s ( "The expression of type %S is not an array, it cannot be"
  96         ^^"accessed in %s")
  97         (Typ.to_string ty) (Pos.to_string pos)
  98   | Wrong_type {expected; given; pos} ->
  99       s "Type error: expected: %S, but given: %S, in %s"
 100         (Typ.to_string expected)
 101         (Typ.to_string given)
 102         (Pos.to_string pos)
 103   | Wrong_type_of_expression_in_var_dec {var_id; expected; given; pos} ->
 104       s ( "Wrong type of expression in declaration of %S. "
 105         ^^"Expected: %S, given: %S. In %s")
 106         (Sym.to_string var_id)
 107         (Typ.to_string expected)
 108         (Typ.to_string given)
 109         (Pos.to_string pos)
 110   | Wrong_type_used_as_array {ty_id; ty; pos} ->
 111       s ( "Identifier %S is bound to type %S, not an array. "
 112         ^^"It cannot be used in %s")
 113         (Sym.to_string ty_id) (Typ.to_string ty) (Pos.to_string pos)
 114   | Wrong_type_used_as_record {ty_id; ty; pos} ->
 115       s ( "Identifier %S is bound to type %S, not a record. "
 116         ^^"It cannot be used in %s")
 117         (Sym.to_string ty_id) (Typ.to_string ty) (Pos.to_string pos)
 118   | Wrong_type_of_field_value {field_id; expected; given; pos} ->
 119       s ( "Field %S is declared to be of type %S, but is bound to expression "
 120         ^^"of type %S in %s")
 121         (Sym.to_string field_id)
 122         (Typ.to_string expected)
 123         (Typ.to_string given)
 124         (Pos.to_string pos)
 125   | Wrong_type_of_arg {func; expected; given; pos} ->
 126       s ( "Incorrect type of argument to function %S, expected: %S, given: %S,"
 127         ^^" in %s")
 128         (Sym.to_string func)
 129         (Typ.to_string expected)
 130         (Typ.to_string given)
 131         (Pos.to_string pos)
 132   | Wrong_number_of_args {func; expected; given; pos} ->
 133       s ( "Incorrect number of arguments to function %S, "
 134         ^^"expected: %d, given: %d,"
 135         ^^" in %s")
 136         (Sym.to_string func) expected given (Pos.to_string pos)
 137   | Invalid_operand_type {oper; valid; given; pos} ->
 138       s ( "Invalid operand type %S for operator %S, which expects only: %s"
 139         ^^". In %s")
 140         (Typ.to_string given)
 141         (Abs.op_show oper)
 142         (String.concat ", " valid)
 143         (Pos.to_string pos)
 144   | Different_operand_types {oper; left; right; pos} ->
 145       s "Operands of different types (%S %S %S) given in %s"
 146         (Typ.to_string left)
 147         (Abs.op_show oper)
 148         (Typ.to_string right)
 149         (Pos.to_string pos)
 150
 151 let is_unknown_id t =
 152   match t with
 153   | Unknown_id _ ->
 154       true
 155   | Invalid_syntax _
 156   | Unknown_type _
 157   | Id_is_a_function _
 158   | Id_not_a_function _
 159   | No_such_field_in_record _
 160   | Exp_not_a_record _
 161   | Exp_not_an_array _
 162   | Wrong_type _
 163   | Wrong_type_of_expression_in_var_dec _
 164   | Wrong_type_used_as_array _
 165   | Wrong_type_used_as_record _
 166   | Wrong_type_of_field_value _
 167   | Wrong_type_of_arg _
 168   | Wrong_number_of_args _
 169   | Invalid_operand_type _
 170   | Different_operand_types _ ->
 171       false
 172
 173 let is_unknown_type t =
 174   match t with
 175   | Unknown_type _ ->
 176       true
 177   | Unknown_id _
 178   | Invalid_syntax _
 179   | Id_is_a_function _
 180   | Id_not_a_function _
 181   | No_such_field_in_record _
 182   | Exp_not_a_record _
 183   | Exp_not_an_array _
 184   | Wrong_type _
 185   | Wrong_type_of_expression_in_var_dec _
 186   | Wrong_type_used_as_array _
 187   | Wrong_type_used_as_record _
 188   | Wrong_type_of_field_value _
 189   | Wrong_type_of_arg _
 190   | Wrong_number_of_args _
 191   | Invalid_operand_type _
 192   | Different_operand_types _ ->
 193       false
 194
 195 let is_wrong_type t =
 196   match t with
 197   | Wrong_type _ ->
 198       true
 199   | Unknown_type _
 200   | Unknown_id _
 201   | Invalid_syntax _
 202   | Id_is_a_function _
 203   | Id_not_a_function _
 204   | No_such_field_in_record _
 205   | Exp_not_a_record _
 206   | Exp_not_an_array _
 207   | Wrong_type_of_expression_in_var_dec _
 208   | Wrong_type_used_as_array _
 209   | Wrong_type_used_as_record _
 210   | Wrong_type_of_field_value _
 211   | Wrong_type_of_arg _
 212   | Wrong_number_of_args _
 213   | Invalid_operand_type _
 214   | Different_operand_types _ ->
 215       false
 216
 217 let is_invalid_syntax t =
 218   match t with
 219   | Invalid_syntax _ ->
 220       true
 221   | Wrong_type _
 222   | Unknown_type _
 223   | Unknown_id _
 224   | Id_is_a_function _
 225   | Id_not_a_function _
 226   | No_such_field_in_record _
 227   | Exp_not_a_record _
 228   | Exp_not_an_array _
 229   | Wrong_type_of_expression_in_var_dec _
 230   | Wrong_type_used_as_array _
 231   | Wrong_type_used_as_record _
 232   | Wrong_type_of_field_value _
 233   | Wrong_type_of_arg _
 234   | Wrong_number_of_args _
 235   | Invalid_operand_type _
 236   | Different_operand_types _ ->
 237       false