Merge pull request #247 from QE-Lab/bug/duplicate-kernel-names

fixed duplicate kernel name issue

Author: imranashraf

src/program.cc

@@ -97,6 +97,13 @@ void quantum_program::add(ql::quantum_kernel &k)
         }
     }
 
+    for (auto kernel : kernels)
+    {
+        if(kernel.name == k.name)
+        {
+            FATAL("Cannot add kernel. Duplicate kernel name: " << k.name);
+        }
+    }
     // if sane, now add kernel to list of kernels
     kernels.push_back(k);
 }

tests/test_Kernel.py

@@ -111,6 +111,32 @@ def test_multi_kernel(self):
 
         p.compile()
 
+    def test_duplicate_kernel_name(self):
+        nqubits = 3
+
+        p = ql.Program("aProgram", platf, nqubits)
+        k1 = ql.Kernel("aKernel1", platf, nqubits)
+        k2 = ql.Kernel("aKernel2", platf, nqubits)
+        k3 = ql.Kernel("aKernel1", platf, nqubits)
+
+        k1.gate('x', [0])
+        k2.gate('x', [0])
+        k3.gate('x', [0])
+
+        # add the kernel to the program
+        p.add_kernel(k1)
+        p.add_kernel(k2)
+
+        # following call to add_kernel should fail as k3 has duplicate name
+        try:
+            p.add_kernel(k3)
+            raise
+        except:
+            pass
+
+        # compile the program
+        p.compile()
+
 
 if __name__ == '__main__':
     unittest.main()