From 903d23cbfbee812406685dcf760db4ae89c7083e Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Fri, 17 May 2024 16:21:13 +0200
Subject: [PATCH] Eigen matrix doesn't support iterators

---
 test/boost_math_issue_1131.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/boost_math_issue_1131.cpp b/test/boost_math_issue_1131.cpp
index 7cc11f8a0..57d0eb9d0 100644
--- a/test/boost_math_issue_1131.cpp
+++ b/test/boost_math_issue_1131.cpp
@@ -6,18 +6,18 @@
 #include <Eigen/Eigenvalues>
 #include <boost/multiprecision/eigen.hpp>
 #include <boost/multiprecision/cpp_bin_float.hpp>
+#include <iostream>
 
 using boost::multiprecision::cpp_bin_float_100;
 
 int main() {
-
     Eigen::Matrix<cpp_bin_float_100, Eigen::Dynamic, Eigen::Dynamic> A = Eigen::Matrix<cpp_bin_float_100, Eigen::Dynamic, Eigen::Dynamic>::Identity(3,3);
     Eigen::EigenSolver<decltype(A)> es;
     es.compute(A, /*computeEigenvectors=*/ false);
 
     auto eigs = es.eigenvalues();
-    for (auto eig : eigs) {
-        std::cout << eig << "\n";
+    for (std::size_t i = 0; i < eigs.size(); ++i) {
+        std::cout << eigs[i] << "\n";
     }
 
     return 0;