suppress template instantiations for dynamic-sized objects

Event/EventPrimitives/EventPrimitives/EventPrimitivesHelpers.h

@@ -50,6 +50,7 @@ inline bool saneCovarianceDiagonal(const AmgSymMatrix(N) & mat) {
   // For now use float min 1.1754943508222875e-38
   // This implies that (sigma(q/p)) ^2 has to be greater than
   // than 1.1754943508222875e-38
+  static_assert(N >= 0, "only available for fixed-size matrices");
   constexpr double MIN_COV_EPSILON = std::numeric_limits<float>::min();
   constexpr int dim = N;
   for (int i = 0; i < dim; ++i) {
@@ -62,6 +63,7 @@ inline bool saneCovarianceDiagonal(const AmgSymMatrix(N) & mat) {
 //// length of the vector is still within the Geneva area, i.e. 10 km
 template <int N>
 inline bool saneVector(const AmgVector(N) & vec) {
+  static_assert(N >= 0, "only available for fixed-size vectors");
   for (int i = 0; i < N; ++i) {
     if (std::isnan(vec[i]) || std::isinf(vec[i]))
       return false;
@@ -91,6 +93,7 @@ inline constexpr int CalculateCompressedSize(int n) {
 template <int N>
 inline void compress(const AmgSymMatrix(N) & covMatrix,
                      std::vector<float>& vec) {
+  static_assert(N >= 0, "only available for fixed-size matrices");
   vec.reserve(CalculateCompressedSize(N));
   for (unsigned int i = 0; i < N; ++i)
     for (unsigned int j = 0; j <= i; ++j)
@@ -111,6 +114,7 @@ template <int N>
 inline void expand(std::vector<float>::const_iterator it,
                    std::vector<float>::const_iterator,
                    AmgSymMatrix(N) & covMatrix) {
+  static_assert(N >= 0, "only available for fixed-size matrices");
   for (unsigned int i = 0; i < N; ++i) {
     for (unsigned int j = 0; j <= i; ++j) {
       covMatrix.fillSymmetric(i, j, *it);
@@ -145,6 +149,7 @@ template <int N>
 std::pair<int, int> compare(const AmgSymMatrix(N) & m1,
                             const AmgSymMatrix(N) & m2, double precision = 1e-9,
                             bool relative = false) {
+  static_assert(N >= 0, "only available for fixed-size matrices");
   for (int i = 0; i < N; ++i) {
     for (int j = 0; j < N; ++j) {
       if (relative) {
@@ -170,6 +175,7 @@ std::pair<int, int> compare(const AmgSymMatrix(N) & m1,
 template <int N>
 int compare(const AmgVector(N) & m1, const AmgVector(N) & m2,
             double precision = 1e-9, bool relative = false) {
+  static_assert(N >= 0, "only available for fixed-size vectors");
   for (int i = 0; i < N; ++i) {
     if (relative) {
       if (0.5 * std::abs(m1(i) - m2(i)) / (m1(i) + m2(i)) > precision)