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			13 lines
		
	
	
		
			450 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
			
		
		
	
	
			13 lines
		
	
	
		
			450 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
| abstract contract A {
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| 	function foo() internal virtual returns (uint256);
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| }
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| abstract contract B {
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| 	function foo() internal virtual returns (uint256);
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| 	function test() internal virtual returns (uint256);
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| }
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| abstract contract X is A, B {
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| 	function test() internal override returns (uint256) {}
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| }
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| // ----
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| // TypeError: (205-292): Derived contract must override function "foo". Two or more base classes define function with same name and parameter types.
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