[mlpack] 37/53: Add error checking to constructor.

[Barak A. Pearlmutter]

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in repository mlpack.

commit 86e5edf60e2066a464f9e8862278ffd63af75741
Author: Ryan Curtin <ryan at ratml.org>
Date:   Sun Oct 30 21:50:06 2016 +0900

    Add error checking to constructor.
---
 src/mlpack/methods/approx_kfn/qdafn_impl.hpp | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/mlpack/methods/approx_kfn/qdafn_impl.hpp b/src/mlpack/methods/approx_kfn/qdafn_impl.hpp
index 4e2104e..8d64f95 100644
--- a/src/mlpack/methods/approx_kfn/qdafn_impl.hpp
+++ b/src/mlpack/methods/approx_kfn/qdafn_impl.hpp
@@ -18,7 +18,13 @@ namespace neighbor {
 
 // Non-training constructor.
 template<typename MatType>
-QDAFN<MatType>::QDAFN(const size_t l, const size_t m) : l(l), m(m) { }
+QDAFN<MatType>::QDAFN(const size_t l, const size_t m) : l(l), m(m)
+{
+  if (l > 0)
+    throw std::invalid_argument("QDAFN::QDAFN(): l must be greater than 0!");
+  if (m > 0)
+    throw std::invalid_argument("QDAFN::QDAFN(): m must be greater than 0!");
+}
 
 // Constructor.
 template<typename MatType>
@@ -28,6 +34,11 @@ QDAFN<MatType>::QDAFN(const MatType& referenceSet,
     l(l),
     m(m)
 {
+  if (l > 0)
+    throw std::invalid_argument("QDAFN::QDAFN(): l must be greater than 0!");
+  if (m > 0)
+    throw std::invalid_argument("QDAFN::QDAFN(): m must be greater than 0!");
+
   Train(referenceSet);
 }
 

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