Language/12_Expressions/05_Strings/1_String_Interpolation_A01_t17.dart

/*
 * Copyright (c) 2011, 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.
 */
/**
 * @assertion It is possible to embed expressions within non-raw string literals, such that these
 * expressions are evaluated, and the resulting values are converted into strings and concatenated
 * with the enclosing string. This process is known as string interpolation.
 * STRING_INTERPOLATION:
 *   '$' IDENTIFIER_NO_DOLLAR
 *   | '$' '{' Expression '}'
 * ;
 * @description Checks that it is not a compile-time error when an interpolation construct
 * in a multi-line string is an expression that is broken up by newlines where whitespace characters
 * are allowed and that such expression is evaluated correctly.
 * @author rodionov
 * @reviewer kaigorodov
 */
import "../../../Utils/expect.dart";

main() {
  String s1 = """${2
  		*
  		
  		2
    }""";
		
  Expect.equals("4", s1);

  String s2 = '''${3
    *
    
    4
  }''';
  Expect.equals("12", s2);
  
  String s3 = """${
    "foo"
    'bar'
  }""";
  Expect.equals("foobar", s3);

  String s4 = '''${
    'bar'
    "foo"
  }''';
  Expect.equals("barfoo", s4);
}