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define structContainsField()
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%H structContainsField [Mh]
%H
%H  SYNOPSIS
%H     tests wheter a structure contains a field
%H
%H  USAGE
%H     Char_Type contains = structContainsField(Struct_Type s, String_Type fieldname);
%H
%H  DESCRIPTION
%H     contains = arrayContains(get_struct_field_names(s), fieldname);
%H     However, please use the S-Lang function struct_field_exists.
%H
%H  SEE ALSO
%H      arrayContains [Mh], get_struct_field_names [Mh], struct_contains_field
%H
{
  variable s, fieldname;
  switch(_NARGS)
  { case 2: (s, fieldname) = (); }
  { help(_function_name()); return; }
  message("structContainsField: use struct_field_exists");

  return arrayContains(get_struct_field_names(s), fieldname);
}