Add support for Intl.select

pkg/intl/test/message_extraction/sample_with_messages.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * This is a program with various [Intl.message] messages. It just prints
  * all of them, and is used for testing of message extraction, translation,
  * and code generation.
  */
 library sample;
@@ skipping 57 matching lines @@
 outerPlural(n) => Intl.plural(n, zero: 'none', one: 'one', other: 'some',
     name: 'outerPlural', desc: 'A plural with no enclosing message', args: [n]);
 
 outerGender(g) => Intl.gender(g, male: 'm', female: 'f', other: 'o',
     name: 'outerGender', desc: 'A gender with no enclosing message', args: [g]);
 
 // A standalone gender message where we don't provide name or args. This should
 // be rejected by validation code.
 invalidOuterGender(g) => Intl.gender(g, other: 'o');
 
+// A general select
+outerSelect(currency, amount) => Intl.select(currency,
+    {
+      "CDN" : "$amount Canadian dollars",
+      "other" : "$amount some currency or other."
+    },
+    name: "outerSelect",
+    args: [currency, amount]);
+
+// A select with a plural inside the expressions.
+nestedSelect(currency, amount) => Intl.select(currency,
+    {
+      "CDN" : """${Intl.plural(amount, one: '$amount Canadian dollar',
+          other: '$amount Canadian dollars')}""",
+      "other" : "Whatever",
+    },
+    name: "nestedSelect",
+    args: [currency, amount]);
+
 // A trivial nested plural/gender where both are done directly rather than
 // in interpolations.
 nestedOuter(number, gen) => Intl.plural(number,
     other: Intl.gender(gen, male: "$number male", other: "$number other"),
     name: 'nestedOuter',
     args: [number, gen]);
 
 printStuff(Intl locale) {
 
   // Use a name that's not a literal so this will get skipped. Then we have
@@ skipping 51 matching lines @@
     print(thing.nested([alice], "magasin"));
     print(thing.nested([], "magasin"));
     print(thing.nested([bob, bob], "magasin"));
     print(thing.nested([alice, alice], "magasin"));
 
     print(outerPlural(0));
     print(outerPlural(1));
     print(outerGender("male"));
     print(outerGender("female"));
     print(nestedOuter(7, "male"));
+    print(outerSelect("CDN", 7));
+    print(outerSelect("EUR", 5));
+    print(nestedSelect("CDN", 1));
+    print(nestedSelect("CDN", 2));
   });
 }
 
 var localeToUse = 'en_US';
 
 main() {
   var fr = new Intl("fr");
   var english = new Intl("en_US");
   var de = new Intl("de_DE");
   initializeMessages(fr.locale).then((_) => printStuff(fr));
   initializeMessages(de.locale).then((_) => printStuff(de));
   printStuff(english);
 }