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-rw-r--r--eigen/doc/snippets/compile_snippet.cpp.in10
1 files changed, 9 insertions, 1 deletions
diff --git a/eigen/doc/snippets/compile_snippet.cpp.in b/eigen/doc/snippets/compile_snippet.cpp.in
index 894cd52..d63f371 100644
--- a/eigen/doc/snippets/compile_snippet.cpp.in
+++ b/eigen/doc/snippets/compile_snippet.cpp.in
@@ -1,5 +1,13 @@
-#include <Eigen/Dense>
+static bool eigen_did_assert = false;
+#define eigen_assert(X) if(!eigen_did_assert && !(X)){ std::cout << "### Assertion raised in " << __FILE__ << ":" << __LINE__ << ":\n" #X << "\n### The following would happen without assertions:\n"; eigen_did_assert = true;}
+
#include <iostream>
+#include <Eigen/Eigen>
+
+#ifndef M_PI
+#define M_PI 3.1415926535897932384626433832795
+#endif
+
using namespace Eigen;
using namespace std;