bees: remove local cruft, throw at github

lib/error.cc

@@ -0,0 +1,74 @@
+#include "crucible/error.h"
+
+#include <cstdarg>
+#include <iostream>
+
+#include <cxxabi.h>
+
+namespace crucible {
+	using namespace std;
+
+	static
+	string
+	analyze_exception(const exception &e)
+	{
+		// Let's ignore all the potential memory allocation exceptions for now, K?
+		ostringstream oss;
+
+		int status;
+		char *realname = abi::__cxa_demangle(typeid(e).name(), 0, 0, &status);
+		oss << "exception type ";
+		// This is questionable since anything that would cause
+		// cxa_demangle to fail will probably cause an exception anyway.
+		if (realname) {
+			oss << realname;
+			free(realname);
+		} else {
+			oss << typeid(e).name();
+		}
+		oss << ": " << e.what();
+		return oss.str();
+	}
+
+	// FIXME:  could probably avoid some of these levels of indirection
+	static
+	function<void(string s)> current_catch_explainer = [&](string s) {
+		cerr << s << endl;
+	};
+
+	void
+	set_catch_explainer(function<void(string s)> f)
+	{
+		current_catch_explainer = f;
+	}
+
+	void
+	default_catch_explainer(string s)
+	{
+		current_catch_explainer(s);
+	}
+
+	int
+	catch_all(const function<void()> &f, const function<void(string)> &explainer)
+	{
+		try {
+			f();
+			return 0;
+		} catch (const exception &e) {
+			explainer(analyze_exception(e));
+			return 1;
+		}
+	}
+
+	void
+	catch_and_explain(const function<void()> &f, const function<void(string)> &explainer)
+	{
+		try {
+			f();
+		} catch (const exception &e) {
+			explainer(analyze_exception(e));
+			throw;
+		}
+	}
+
+};