Language/Expressions/Numbers/syntax_t05.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 A numeric literal is either a decimal or hexadecimal integer of
/// arbitrary size, or a decimal double.
///
/// numericLiteral:
///   NUMBER|
///   HEX_NUMBER
///;
/// NUMBER:
///   DIGIT+ ('.' DIGIT+)? EXPONENT? |
///  '.' DIGIT+ EXPONENT?
/// ;
/// EXPONENT:
///   ('e' | 'E') ('+' | '-')? DIGIT+
/// ;
/// HEX NUMBER:
///   '0x' HEX DIGIT+ |
///   '0X' HEX DIGIT+
/// ;
/// HEX DIGIT:
///   'a'..'f' |
///   'A'..'F' |
///   DIGIT
/// ;
/// @description Checks that specifying the exponent value of (+/-)0 is indeed
/// redundant.
/// @author hlodvig

import '../../../Utils/expect.dart';

void check(i, expected) {
  Expect.isTrue(i is num);
  Expect.equals(expected, i);
}

main() {
  check(0e0, 0);
  check(1e+0, 1);
  check(2e-0, 2);
  check(3e0, 3);
  check(4e+0, 4);
  check(5e-0, 5);
  check(6e0, 6);
  check(7e+0, 7);
  check(8e-0, 8);
  check(9e0, 9);
  check(0.0e+0, 0);
  check(1.0e-0, 1);
  check(2.0e0, 2);
  check(3.0e+0, 3);
  check(4.0e-0, 4);
  check(5.0e0, 5);
  check(6.0e+0, 6);
  check(7.0e-0, 7);
  check(8.0e0, 8);
  check(9.0e+0, 9);
  check(0.0e-0, 0);
  check(1.0e+0, 1);
  check(2.0e-0, 2);
  check(3.0e+0, 3);
  check(4.0e-0, 4);
  check(5.0e+0, 5);
  check(6.0e-0, 6);
  check(7.0e+0, 7);
  check(8.0e-0, 8);
  check(9.0e+0, 9);
  check(.0e+0, 0.0);
  check(.1e0, 0.1);
  check(.2e-0, 0.2);
  check(.3e0, 0.3);
  check(.4e+0, 0.4);
  check(.5e0, 0.5);
  check(.6e-0, 0.6);
  check(.7e0, 0.7);
  check(.8e+0, 0.8);
  check(.9e0, 0.9);
}