16 lines
		
	
	
		
			237 B
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			16 lines
		
	
	
		
			237 B
		
	
	
	
		
			C++
		
	
	
	
	
	
| #include "../Eigen/Core"
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| 
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| using namespace Eigen;
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| 
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| void call_ref(Ref<VectorXf> a) {}
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| 
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| int main() {
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|   VectorXf a(10);
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|   DenseBase<VectorXf> &ac(a);
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| #ifdef EIGEN_SHOULD_FAIL_TO_BUILD
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|   call_ref(ac);
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| #else
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|   call_ref(ac.derived());
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| #endif
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| }
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