From 2ce23f4e1e77db18f9bcc78cd4e3d280f3793c14 Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Sat, 19 Jul 2025 11:47:03 -0500
Subject: [PATCH] pretty printing -- copmlete for
 xo::ast::GeneralizedExpression

---
 include/xo/simulator/Simulator.hpp |  2 ++
 src/simulator/Simulator.cpp        | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/include/xo/simulator/Simulator.hpp b/include/xo/simulator/Simulator.hpp
index 37c696cf..3a57b783 100644
--- a/include/xo/simulator/Simulator.hpp
+++ b/include/xo/simulator/Simulator.hpp
@@ -218,6 +218,8 @@ namespace xo {
             /* synonym for .advance_one_event() */
             virtual std::uint64_t run_one() override;
 
+            virtual void display(std::ostream & os) const override;
+
         private:
             explicit Simulator(utc_nanos t0);
 
diff --git a/src/simulator/Simulator.cpp b/src/simulator/Simulator.cpp
index 2f6ddff5..7c63ed14 100644
--- a/src/simulator/Simulator.cpp
+++ b/src/simulator/Simulator.cpp
@@ -543,6 +543,16 @@ namespace xo {
             return n;
         } /*run_throttled_until*/
 
+        void
+        Simulator::display(std::ostream & os) const
+        {
+            os << "<Simulator"
+               << xtag("sim_heap.size", sim_heap_.size())
+               << xtag("n_event", n_event_)
+               << xtag("src_v.size", src_v_.size())
+               << ">";
+        } /*display*/
+
     } /*namespace sim*/
 } /*namespace xo*/