/// shared DDD Domains: TCountry object definition
// - this unit is a part of the freeware Synopse mORMot framework,
// licensed under a MPL/GPL/LGPL tri-license; version 1.18
unit dddDomCountry;

{
    This file is part of Synopse mORMot framework.

    Synopse mORMot framework. Copyright (C) 2022 Arnaud Bouchez
      Synopse Informatique - https://synopse.info

  *** BEGIN LICENSE BLOCK *****
  Version: MPL 1.1/GPL 2.0/LGPL 2.1

  The contents of this file are subject to the Mozilla Public License Version
  1.1 (the "License"); you may not use this file except in compliance with
  the License. You may obtain a copy of the License at
  http://www.mozilla.org/MPL

  Software distributed under the License is distributed on an "AS IS" basis,
  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  for the specific language governing rights and limitations under the License.

  The Original Code is Synopse mORMot framework.

  The Initial Developer of the Original Code is Arnaud Bouchez.

  Portions created by the Initial Developer are Copyright (C) 2022
  the Initial Developer. All Rights Reserved.

  Contributor(s):

  
  Alternatively, the contents of this file may be used under the terms of
  either the GNU General Public License Version 2 or later (the "GPL"), or
  the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  in which case the provisions of the GPL or the LGPL are applicable instead
  of those above. If you wish to allow use of your version of this file only
  under the terms of either the GPL or the LGPL, and not to allow others to
  use your version of this file under the terms of the MPL, indicate your
  decision by deleting the provisions above and replace them with the notice
  and other provisions required by the GPL or the LGPL. If you do not delete
  the provisions above, a recipient may use your version of this file under
  the terms of any one of the MPL, the GPL or the LGPL.

  ***** END LICENSE BLOCK *****

}

{$I Synopse.inc} // define HASINLINE CPU32 CPU64 OWNNORMTOUPPER

interface

uses
  SysUtils,
  Classes,
  SynCommons,
  SynTests,
  mORMot,
  mORMotDDD;


{ *********** Country Modeling }

type
  /// Country identifiers, following ISO 3166-1 standard
  TCountryIdentifier = (ccUndefined,
    ccAF,ccAX,ccAL,ccDZ,ccAS,ccAD,ccAO,ccAI,ccAQ,ccAG,ccAR,ccAM,ccAW,ccAU,ccAT,
    ccAZ,ccBS,ccBH,ccBD,ccBB,ccBY,ccBE,ccBZ,ccBJ,ccBM,ccBT,ccBO,ccBQ,ccBA,ccBW,
    ccBV,ccBR,ccIO,ccBN,ccBG,ccBF,ccBI,ccKH,ccCM,ccCA,ccCV,ccKY,ccCF,ccTD,ccCL,
    ccCN,ccCX,ccCC,ccCO,ccKM,ccCG,ccCD,ccCK,ccCR,ccCI,ccHR,ccCU,ccCW,ccCY,ccCZ,
    ccDK,ccDJ,ccDM,ccDO,ccEC,ccEG,ccSV,ccGQ,ccER,ccEE,ccET,ccFK,ccFO,ccFJ,ccFI,
    ccFR,ccGF,ccPF,ccTF,ccGA,ccGM,ccGE,ccDE,ccGH,ccGI,ccGR,ccGL,ccGD,ccGP,ccGU,
    ccGT,ccGG,ccGN,ccGW,ccGY,ccHT,ccHM,ccVA,ccHN,ccHK,ccHU,ccIS,ccIN,ccID,ccIR,
    ccIQ,ccIE,ccIM,ccIL,ccIT,ccJM,ccJP,ccJE,ccJO,ccKZ,ccKE,ccKI,ccKP,ccKR,ccKW,
    ccKG,ccLA,ccLV,ccLB,ccLS,ccLR,ccLY,ccLI,ccLT,ccLU,ccMO,ccMK,ccMG,ccMW,ccMY,
    ccMV,ccML,ccMT,ccMH,ccMQ,ccMR,ccMU,ccYT,ccMX,ccFM,ccMD,ccMC,ccMN,ccME,ccMS,
    ccMA,ccMZ,ccMM,ccNA,ccNR,ccNP,ccNL,ccNC,ccNZ,ccNI,ccNE,ccNG,ccNU,ccNF,ccMP,
    ccNO,ccOM,ccPK,ccPW,ccPS,ccPA,ccPG,ccPY,ccPE,ccPH,ccPN,ccPL,ccPT,ccPR,ccQA,
    ccRE,ccRO,ccRU,ccRW,ccBL,ccSH,ccKN,ccLC,ccMF,ccPM,ccVC,ccWS,ccSM,ccST,ccSA,
    ccSN,ccRS,ccSC,ccSL,ccSG,ccSX,ccSK,ccSI,ccSB,ccSO,ccZA,ccGS,ccSS,ccES,ccLK,
    ccSD,ccSR,ccSJ,ccSZ,ccSE,ccCH,ccSY,ccTW,ccTJ,ccTZ,ccTH,ccTL,ccTG,ccTK,ccTO,
    ccTT,ccTN,ccTR,ccTM,ccTC,ccTV,ccUG,ccUA,ccAE,ccGB,ccUS,ccUM,ccUY,ccUZ,ccVU,
    ccVE,ccVN,ccVG,ccVI,ccWF,ccEH,ccYE,ccZM,ccZW);

  /// store ISO 3166-1 alpha-2 code
  TCountryIsoAlpha2 = type RawUTF8;
  /// store ISO 3166-1 alpha-3 code
  TCountryIsoAlpha3 = type RawUTF8;
  /// store a ISO 3166-1 numeric value as 16-bit unsigned integer
  TCountryIsoNumeric = type word;

  /// defines a Country identifier object
  // - will store internally the country as 16-bit ISO 3166-1 numeric value
  // - includes conversion methods for ISO 3166-1 alpha-2/alpha-3/numeric codes
  // as explained in http://en.wikipedia.org/wiki/ISO_3166-1
  // - see also some low-level class methods for direct values conversions
  // with no persistence
  TCountry = class(TSynPersistent)
  protected
    fIso: TCountryIsoNumeric;
    fCache: packed record
      Identifier: TCountryIdentifier;
      Iso: TCountryIsoNumeric;
    end;
    function GetIdentifier: TCountryIdentifier;
    function GetIsoAlpha2: TCountryIsoAlpha2;
    function GetIsoAlpha3: TCountryIsoAlpha3;
    procedure SetIdentifier(const Value: TCountryIdentifier);
    procedure SetIsoAlpha2(const Value: TCountryIsoAlpha2);
    procedure SetIsoAlpha3(const Value: TCountryIsoAlpha3);
    function GetEnglish: RawUTF8;
  public
    /// low-level Country conversion into its plain English text
    class function ToEnglish(id: TCountryIdentifier): RawUTF8;
    /// low-level Country conversion into its alpha-2 code
    class function ToAlpha2(id: TCountryIdentifier): TCountryIsoAlpha2;
    /// low-level Country conversion into its alpha-3 code
    class function ToAlpha3(id: TCountryIdentifier): TCountryIsoAlpha3;
    /// low-level Country conversion to its ISO 3166-1 numeric 3-digit code
    class function ToIso(id: TCountryIdentifier): TCountryIsoNumeric;
    /// low-level case-insensitive Country conversion from its plain English text
    // - returns ccUndefined if the supplied Text has no case-insensitive match
    class function FromEnglish(const text: RawUTF8): TCountryIdentifier;
    /// low-level Country conversion from its alpha-2 code
    // - returns ccUndefined if the supplied text has no case-insensitive match
    class function FromAlpha2(const alpha: TCountryIsoAlpha2): TCountryIdentifier;
    /// low-level Country conversion from its alpha-3 code
    // - returns ccUndefined if the supplied Text has no case-insensitive match
    class function FromAlpha3(const alpha: TCountryIsoAlpha3): TCountryIdentifier;
    /// low-level Country conversion from its alpha-2 code
    // - returns ccUndefined if the supplied 16-bit number as no match
    class function FromIso(iso: TCountryIsoNumeric): TCountryIdentifier;
    /// built-in simple unit tests
    class procedure RegressionTests(test: TSynTestCase);
    /// returns TRUE if both Country instances have the same content
    // - slightly faster than global function ObjectEquals(self,another)
    function Equals(another: TCountry): boolean; reintroduce;
    /// internal enumerate corresponding to this country
    property Identifier: TCountryIdentifier read GetIdentifier write SetIdentifier;
    /// the ISO 3166-1 alpha-2 code of this country
    property Alpha2: TCountryIsoAlpha2 read GetIsoAlpha2 write SetIsoAlpha2;
    /// the ISO 3166-1 alpha-3 code of this countr
    property Alpha3: TCountryIsoAlpha3 read GetIsoAlpha3 write SetIsoAlpha3;
    /// plain English text of this country, e.g. 'France' or 'United States'
    property English: RawUTF8 read GetEnglish;
  published
    /// the stored and transmitted value is this ISO 3166-1 numeric 3-digit code
    property Iso: TCountryIsoNumeric read fIso write fIso;
  end;



implementation

{ TCountry }

const
  COUNTRY_NAME_EN: array[TCountryIdentifier] of RawUTF8 = ('',
    'Afghanistan','Aland Islands','Albania','Algeria','American Samoa',
    'Andorra','Angola','Anguilla','Antarctica','Antigua and Barbuda',
    'Argentina','Armenia','Aruba','Australia','Austria','Azerbaijan',
    'Bahamas','Bahrain','Bangladesh','Barbados','Belarus','Belgium',
    'Belize','Benin','Bermuda','Bhutan','Bolivia, Plurinational State of',
    'Bonaire, Sint Eustatius and Saba','Bosnia and Herzegovina','Botswana',
    'Bouvet Island','Brazil','British Indian Ocean Territory',
    'Brunei Darussalam','Bulgaria','Burkina Faso','Burundi','Cambodia',
    'Cameroon','Canada','Cape Verde','Cayman Islands','Central African Republic',
    'Chad','Chile','China','Christmas Island','Cocos (Keeling) Islands',
    'Colombia','Comoros','Congo','Congo, the Democratic Republic of the',
    'Cook Islands','Costa Rica','Ivory Coast','Croatia','Cuba','Curacao',
    'Cyprus','Czech Republic','Denmark','Djibouti','Dominica',
    'Dominican Republic','Ecuador','Egypt','El Salvador','Equatorial Guinea',
    'Eritrea','Estonia','Ethiopia','Falkland Islands (Malvinas)',
    'Faroe Islands','Fiji','Finland','France','French Guiana',
    'French Polynesia','French Southern Territories','Gabon','Gambia','Georgia',
    'Germany','Ghana','Gibraltar','Greece','Greenland','Grenada','Guadeloupe',
    'Guam','Guatemala','Guernsey','Guinea','Guinea-Bissau','Guyana','Haiti',
    'Heard Island and McDonald Islands','Holy See (Vatican City State)',
    'Honduras','Hong Kong','Hungary','Iceland','India','Indonesia',
    'Iran, Islamic Republic of','Iraq','Ireland','Isle of Man','Israel',
    'Italy','Jamaica','Japan','Jersey','Jordan','Kazakhstan','Kenya',
    'Kiribati','Korea, Democratic People''s Republic of','Korea, Republic of',
    'Kuwait','Kyrgyzstan','Lao People''s Democratic Republic','Latvia',
    'Lebanon','Lesotho','Liberia','Libyan Arab Jamahiriya','Liechtenstein',
    'Lithuania','Luxembourg','Macao','Macedonia, the former Yugoslav Republic of',
    'Madagascar','Malawi','Malaysia','Maldives','Mali','Malta','Marshall Islands',
    'Martinique','Mauritania','Mauritius','Mayotte','Mexico',
    'Micronesia, Federated States of','Moldova, Republic of','Monaco',
    'Mongolia','Montenegro','Montserrat','Morocco','Mozambique','Myanmar',
    'Namibia','Nauru','Nepal','Netherlands','New Caledonia','New Zealand',
    'Nicaragua','Niger','Nigeria','Niue','Norfolk Island',
    'Northern Mariana Islands','Norway','Oman','Pakistan','Palau',
    'Palestinian Territory','Panama','Papua New Guinea','Paraguay','Peru',
    'Philippines','Pitcairn','Poland','Portugal','Puerto Rico','Qatar',
    'Reunion','Romania','Russian Federation','Rwanda','Saint Barthelemy',
    'Saint Helena, Ascension and Tristan da Cunha','Saint Kitts and Nevis',
    'Saint Lucia','Saint Martin (French part)','Saint Pierre and Miquelon',
    'Saint Vincent and the Grenadines','Samoa','San Marino',
    'Sao Tome and Principe','Saudi Arabia','Senegal','Serbia',
    'Seychelles','Sierra Leone','Singapore','Sint Maarten (Dutch part)',
    'Slovakia','Slovenia','Solomon Islands','Somalia','South Africa',
    'South Georgia and the South Sandwich Islands','South Sudan','Spain',
    'Sri Lanka','Sudan','Suriname','Svalbard and Jan Mayen','Swaziland',
    'Sweden','Switzerland','Syrian Arab Republic','Taiwan, Province of China',
    'Tajikistan','Tanzania, United Republic of','Thailand','Timor-Leste',
    'Togo','Tokelau','Tonga','Trinidad and Tobago','Tunisia','Turkey',
    'Turkmenistan','Turks and Caicos Islands','Tuvalu','Uganda','Ukraine',
    'United Arab Emirates','United Kingdom','United States',
    'United States Minor Outlying Islands','Uruguay','Uzbekistan','Vanuatu',
    'Venezuela, Bolivarian Republic of','Viet Nam','Virgin Islands, British',
    'Virgin Islands, U.S.','Wallis and Futuna','Western Sahara','Yemen',
    'Zambia','Zimbabwe');

  COUNTRY_ISO3: array[TCountryIdentifier] of array[0..3] of AnsiChar = ('',
    'AFG','ALA','ALB','DZA','ASM','AND','AGO','AIA','ATA','ATG','ARG','ARM',
    'ABW','AUS','AUT','AZE','BHS','BHR','BGD','BRB','BLR','BEL','BLZ','BEN',
    'BMU','BTN','BOL','BES','BIH','BWA','BVT','BRA','IOT','BRN','BGR','BFA',
    'BDI','KHM','CMR','CAN','CPV','CYM','CAF','TCD','CHL','CHN','CXR','CCK',
    'COL','COM','COG','COD','COK','CRI','CIV','HRV','CUB','CUW','CYP','CZE',
    'DNK','DJI','DMA','DOM','ECU','EGY','SLV','GNQ','ERI','EST','ETH','FLK',
    'FRO','FJI','FIN','FRA','GUF','PYF','ATF','GAB','GMB','GEO','DEU','GHA',
    'GIB','GRC','GRL','GRD','GLP','GUM','GTM','GGY','GIN','GNB','GUY','HTI',
    'HMD','VAT','HND','HKG','HUN','ISL','IND','IDN','IRN','IRQ','IRL','IMN',
    'ISR','ITA','JAM','JPN','JEY','JOR','KAZ','KEN','KIR','PRK','KOR','KWT',
    'KGZ','LAO','LVA','LBN','LSO','LBR','LBY','LIE','LTU','LUX','MAC','MKD',
    'MDG','MWI','MYS','MDV','MLI','MLT','MHL','MTQ','MRT','MUS','MYT','MEX',
    'FSM','MDA','MCO','MNG','MNE','MSR','MAR','MOZ','MMR','NAM','NRU','NPL',
    'NLD','NCL','NZL','NIC','NER','NGA','NIU','NFK','MNP','NOR','OMN','PAK',
    'PLW','PSE','PAN','PNG','PRY','PER','PHL','PCN','POL','PRT','PRI','QAT',
    'REU','ROU','RUS','RWA','BLM','SHN','KNA','LCA','MAF','SPM','VCT','WSM',
    'SMR','STP','SAU','SEN','SRB','SYC','SLE','SGP','SXM','SVK','SVN','SLB',
    'SOM','ZAF','SGS','SSD','ESP','LKA','SDN','SUR','SJM','SWZ','SWE','CHE',
    'SYR','TWN','TJK','TZA','THA','TLS','TGO','TKL','TON','TTO','TUN','TUR',
    'TKM','TCA','TUV','UGA','UKR','ARE','GBR','USA','UMI','URY','UZB','VUT',
    'VEN','VNM','VGB','VIR','WLF','ESH','YEM','ZMB','ZWE');

  COUNTRY_ISONUM: array[TCountryIdentifier] of word = (0,
    4,248,8,12,16,20,24,660,10,28,32,51,533,36,40,31,44,48,50,52,112,56,84,
    204,60,64,68,535,70,72,74,76,86,96,100,854,108,116,120,124,132,136,140,
    148,152,156,162,166,170,174,178,180,184,188,384,191,192,531,196,203,208,
    262,212,214,218,818,222,226,232,233,231,238,234,242,246,250,254,258,260,
    266,270,268,276,288,292,300,304,308,312,316,320,831,324,624,328,332,334,
    336,340,344,348,352,356,360,364,368,372,833,376,380,388,392,832,400,398,
    404,296,408,410,414,417,418,428,422,426,430,434,438,440,442,446,807,450,
    454,458,462,466,470,584,474,478,480,175,484,583,498,492,496,499,500,504,
    508,104,516,520,524,528,540,554,558,562,566,570,574,580,578,512,586,585,
    275,591,598,600,604,608,612,616,620,630,634,638,642,643,646,652,654,659,
    662,663,666,670,882,674,678,682,686,688,690,694,702,534,703,705,90,706,
    710,239,728,724,144,729,740,744,748,752,756,760,158,762,834,764,626,768,
    772,776,780,788,792,795,796,798,800,804,784,826,840,581,858,860,548,862,
    704,92,850,876,732,887,894,716);

  ccFirst = succ(low(TCountryIdentifier));

var
  COUNTRY_ISO2: array[TCountryIdentifier] of word;
  COUNTRYU_ISO2, COUNTRYU_ISO3: array[TCountryIdentifier] of RawUTF8;
  COUNTRY_ISONUM_ORDERED: record // for fast binary search of the ISO numeric
    Values, Indexes: array[TCountryIdentifier] of integer;
  end;

procedure Initialize;
var c: TCountryIdentifier;
    ps: PAnsiChar; // circumvent FPC compilation issue
begin
  with COUNTRY_ISONUM_ORDERED do begin
    for c := ccFirst to high(c) do begin
      Values[c] := COUNTRY_ISONUM[c];
      ps := pointer(GetEnumName(TypeInfo(TCountryIdentifier),ord(c)));
      COUNTRY_ISO2[c] := PWord(ps+3)^;
      FastSetString(COUNTRYU_ISO2[c],ps+3,2);
      FastSetString(COUNTRYU_ISO3[c],@COUNTRY_ISO3[c],3);
    end;
    FillIncreasing(@Indexes,0,length(Indexes));
    QuickSortInteger(@Values,@Indexes,0,length(Values)-1);
  end;
end;

class function TCountry.ToEnglish(id: TCountryIdentifier): RawUTF8;
begin
  result := COUNTRY_NAME_EN[id];
end;

class function TCountry.ToAlpha2(id: TCountryIdentifier): TCountryIsoAlpha2;
begin
  result := COUNTRYU_ISO2[id];
end;

class function TCountry.ToAlpha3(id: TCountryIdentifier): TCountryIsoAlpha3;
begin
  result := COUNTRYU_ISO3[id];
end;

class function TCountry.ToIso(id: TCountryIdentifier): TCountryIsoNumeric;
begin
  result := COUNTRY_ISONUM[id];
end;

class function TCountry.FromEnglish(const text: RawUTF8): TCountryIdentifier;
var L: integer;
    P: PRawUTF8;
begin
  L := length(text);
  P := @COUNTRY_NAME_EN[ccFirst];
  for result := ccFirst to high(result) do
    if (length(P^)=L) and IdemPropNameUSameLen(pointer(P^),pointer(Text),L) then
      exit else
      inc(P);
  result := ccUndefined;
end;

class function TCountry.FromAlpha2(const alpha: TCountryIsoAlpha2): TCountryIdentifier;
var up: RawUTF8;
    ndx: PtrInt;
begin
  up := UpperCaseU(Trim(alpha));
  if length(up)=2 then begin
    ndx := WordScanIndex(@COUNTRY_ISO2[ccFirst],length(COUNTRY_ISO2)-1,PWord(up)^);
    if ndx>=0 then begin
      result := TCountryIdentifier(ndx+1);
      exit;
    end;
  end;
  result := ccUndefined;
end;

class function TCountry.FromAlpha3(const alpha: TCountryIsoAlpha3): TCountryIdentifier;
var up: RawUTF8;
    ndx: PtrInt;
begin
  up := UpperCaseU(Trim(alpha));
  if length(up)=3 then begin
    ndx := IntegerScanIndex(@COUNTRY_ISO3[ccFirst],length(COUNTRY_ISO3)-1,PCardinal(up)^);
    if ndx>=0 then begin
      result := TCountryIdentifier(ndx+1);
      exit;
    end;
  end;
  result := ccUndefined;
end;

class function TCountry.FromIso(iso: TCountryIsoNumeric): TCountryIdentifier;
var ndx: PtrInt;
begin
  with COUNTRY_ISONUM_ORDERED do begin
    ndx := FastFindIntegerSorted(@Values,length(Values)-1,Iso);
    if ndx<0 then
      result := ccUndefined else
      result := TCountryIdentifier(Indexes[TCountryIdentifier(ndx)]);
  end;
end;

function TCountry.GetEnglish: RawUTF8;
begin
  result := COUNTRY_NAME_EN[GetIdentifier];
end;

function TCountry.GetIdentifier: TCountryIdentifier;
begin
  if Iso=0 then
    result := ccUndefined
  else if Iso=fCache.Iso then
    result := fCache.Identifier
  else begin
    result := FromIso(Iso);
    fCache.Iso := Iso;
    fCache.Identifier := result;
  end;
end;

function TCountry.GetIsoAlpha2: TCountryIsoAlpha2;
begin
  result := COUNTRYU_ISO2[GetIdentifier];
end;

function TCountry.GetIsoAlpha3: TCountryIsoAlpha3;
begin
  result := COUNTRYU_ISO3[GetIdentifier];
end;

procedure TCountry.SetIdentifier(const Value: TCountryIdentifier);
begin
  fIso := COUNTRY_ISONUM[Value];
  if Value<>ccUndefined then begin
    fCache.Iso := fIso;
    fCache.Identifier := Value;
  end;
end;

procedure TCountry.SetIsoAlpha2(const Value: TCountryIsoAlpha2);
begin
  SetIdentifier(FromAlpha2(Value));
end;

procedure TCountry.SetIsoAlpha3(const Value: TCountryIsoAlpha3);
begin
  SetIdentifier(FromAlpha3(Value));
end;

class procedure TCountry.RegressionTests(test: TSynTestCase);
var c,c2: TCountry;
    i: TCountryIdentifier;
    t: RawUTF8;
begin
  c := TCountry.Create;
  c2 := TCountry.Create;
  with test do
  try
    c.Alpha2 := ' fR ';
    Check(c.Iso=250);
    Check(c.Identifier=ccFR);
    c.Alpha2 := ' zz ';
    Check(c.Iso=0);
    Check(c.Identifier=ccUndefined);
    c.Alpha2 := ' fzz ';
    Check(c.Iso=0);
    Check(c.Identifier=ccUndefined);
    c.Alpha3 := ' frA ';
    Check(c.Iso=250);
    Check(c.Identifier=ccFR);
    c.Alpha3 := ' frz ';
    Check(c.Iso=0);
    Check(c.Identifier=ccUndefined);
    Check(TCountry.FromEnglish('none')=ccUndefined);
    for i := low(i) to high(i) do begin
      c.Iso := COUNTRY_ISONUM[i];
      Check(c.Iso=c.ToIso(i));
      t := c.Alpha2;
      Check(c.ToAlpha2(i)=t);
      Check(c.Identifier=i);
      c.Iso := 0;
      c.Alpha2 := t;
      Check(c.Identifier=i);
      Check(c.Iso=COUNTRY_ISONUM[i]);
    end;
    for i := low(i) to high(i) do begin
      c.Identifier := i;
      Check(c.Iso=COUNTRY_ISONUM[i]);
      Check(c.Identifier=i);
    end;
    for i := low(i) to high(i) do begin
      c.Alpha3 := COUNTRY_ISO3[i];
      Check(c.Iso=COUNTRY_ISONUM[i]);
      Check(c.Identifier=i);
      t := c.Alpha3;
      check(c.ToAlpha3(i)=t);
      c.Iso := 0;
      c.Alpha3 := t;
      Check(c.Identifier=i);
      Check(c.Iso=COUNTRY_ISONUM[i]);
      CopyObject(c,c2);
      Check(c2.Iso=COUNTRY_ISONUM[i]);
      Check(c2.Alpha3=c.Alpha3);
      Check(ObjectEquals(c,c2,false));
      Check(ObjectEquals(c,c2,true));
      t := c.English;
      Check(c.ToEnglish(i)=t);
      Check(c.FromEnglish(t)=i);
    end;
  finally
    c2.Free;
    c.Free;
  end;
end;

function TCountry.Equals(another: TCountry): boolean;
begin
  if (self=nil) or (another=nil) then
    result := another=self else
    result := another.fIso=fIso;
end;



initialization
  Initialize;
  {$ifndef ISDELPHI2010}
  {$ifndef HASINTERFACERTTI} // circumvent a old FPC bug
  TTextWriter.RegisterCustomJSONSerializerFromTextSimpleType(TypeInfo(TCountryIdentifier));
  {$endif}
  {$endif}
end.