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			25 lines
		
	
	
		
			618 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			25 lines
		
	
	
		
			618 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| // Copyright 2014 the V8 project authors. All rights reserved.
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| // Use of this source code is governed by a BSD-style license that can be
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| // found in the LICENSE file.
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| 
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| // Flags: --allow-natives-syntax
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| 
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| function MyWrapper(v) {
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|   return { valueOf: function() { return v } };
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| }
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| 
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| function f() {
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|   assertEquals("truex", true + "x");
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|   assertEquals("truey", true + new String("y"));
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|   assertEquals("truez", true + new MyWrapper("z"));
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| 
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|   assertEquals("xtrue", "x" + true);
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|   assertEquals("ytrue", new String("y") + true);
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|   assertEquals("ztrue", new MyWrapper("z") + true);
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| }
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| 
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| f();
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| f();
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| %OptimizeFunctionOnNextCall(f);
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| f();
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