1// Copyright 2008 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
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11//       with the distribution.
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13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
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17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Check that dynamically introducing conflicting consts/vars
29// is silently ignored (and does not lead to exceptions).
30
31// Flags: --legacy-const
32
33var caught = 0;
34
35eval("const a");
36try { eval("var a"); } catch (e) { caught++; assertTrue(e instanceof TypeError); }
37assertTrue(typeof a == 'undefined');
38try { eval("var a = 1"); } catch (e) { caught++; assertTrue(e instanceof TypeError); }
39assertTrue(typeof a == 'undefined');
40
41eval("const b = 0");
42try { eval("var b"); } catch (e) { caught++; assertTrue(e instanceof TypeError); }
43assertEquals(0, b);
44try { eval("var b = 1"); } catch (e) { caught++; assertTrue(e instanceof TypeError); }
45assertEquals(0, b);
46assertEquals(0, caught);
47
48eval("var c");
49try { eval("const c"); } catch (e) { caught++; assertTrue(e instanceof TypeError); }
50assertTrue(typeof c == 'undefined');
51assertEquals(1, caught);
52try { eval("const c = 1"); } catch (e) { caught++; assertTrue(e instanceof TypeError); }
53assertEquals(undefined, c);
54assertEquals(2, caught);
55
56eval("var d = 0");
57try { eval("const d"); } catch (e) { caught++; assertTrue(e instanceof TypeError); }
58assertEquals(0, d);
59assertEquals(3, caught);
60try { eval("const d = 1"); } catch (e) { caught++; assertTrue(e instanceof TypeError); }
61assertEquals(0, d);
62assertEquals(4, caught);
63