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				https://github.com/ethereum/solidity
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			25 lines
		
	
	
		
			844 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
			
		
		
	
	
			25 lines
		
	
	
		
			844 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
abstract contract A {
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	int public testvar;
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	function foo() internal virtual returns (uint256);
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	function test(uint8 _a) virtual internal 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 C {
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	function foo() internal virtual returns (uint256);
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}
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abstract contract D {
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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, C, D {
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	int public override testvar;
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	function test() internal override(B, D, C) returns (uint256);
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	function foo() internal override(A, C) returns (uint256);
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}
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// ----
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// TypeError: (584-601): Invalid contract specified in override list: C.
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// TypeError: (646-660): Function needs to specify overridden contracts B and D.
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