initial commit

third_party/eigen/doc/snippets/compile_snippet.cpp.in

@@ -0,0 +1,24 @@
+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 <cassert>
+#include <Eigen/Dense>
+#include <Eigen/Sparse>
+
+using namespace Eigen;
+using namespace std;
+
+int main(int, char**) {
+  cout.precision(3);
+// intentionally remove indentation of snippet
+{
+${snippet_source_code}
+}
+  return 0;
+}