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			23 lines
		
	
	
		
			468 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
			
		
		
	
	
			23 lines
		
	
	
		
			468 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
| library L {
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| 	struct S {
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| 		uint256[] data;
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| 	}
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| 	function f(S memory _s) internal pure returns (uint256) {
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| 		require(_s.data.length > 0);
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| 		return 42;
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| 	}
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| }
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| 
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| contract C {
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| 	using L for L.S;
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| 	function f() public pure returns (uint256 y) {
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| 		L.S memory x;
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| 		y = (x.f)();
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| 		assert(y == 42); // should hold
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| 	}
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| }
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| // ====
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| // SMTEngine: all
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| // ----
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| // Info 1391: CHC: 1 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.
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