diff --git a/spec/compiler/helpers/stream_methods.cc b/spec/compiler/helpers/stream_methods.cc
index 397494d7..f1f003b9 100644
--- a/spec/compiler/helpers/stream_methods.cc
+++ b/spec/compiler/helpers/stream_methods.cc
@@ -73,13 +73,13 @@ ostream &operator<<(ostream &stream, const ParseAction &action) {
     case ParseActionTypeAccept:
       return stream << string("#<accept>");
     case ParseActionTypeShift:
-      return stream << (string("#<shift ") + to_string(action.state_index) +
-                        ">");
+      return stream << string("#<shift state:") << to_string(action.state_index) <<
+                        string(" precedence:") << action.precedence_range << ">";
     case ParseActionTypeShiftExtra:
       return stream << string("#<shift_extra");
     case ParseActionTypeReduceExtra:
-      return stream << ("#<reduce_extra sym" + to_string(action.symbol.index) +
-                        ">");
+      return stream << "#<reduce_extra sym:" << action.symbol <<
+                        string(" precedence:") << to_string(action.precedence_range.min) << ">";
     case ParseActionTypeReduce:
       return stream << ("#<reduce sym" + to_string(action.symbol.index) + " " +
                         to_string(action.consumed_symbol_count) + ">");
@@ -109,6 +109,10 @@ ostream &operator<<(ostream &stream, const ProductionStep &step) {
   return stream << string("(production_step symbol:") << step.symbol << string(" precedence:") << to_string(step.precedence) << ")";
 }
 
+ostream &operator<<(ostream &stream, const PrecedenceRange &range) {
+  return stream << string("{") << to_string(range.min) << string(", ") << to_string(range.max) << string("}");
+}
+
 namespace build_tables {
 
 ostream &operator<<(ostream &stream, const LexItem &item) {
diff --git a/spec/compiler/helpers/stream_methods.h b/spec/compiler/helpers/stream_methods.h
index 6ed890c3..cd132a03 100644
--- a/spec/compiler/helpers/stream_methods.h
+++ b/spec/compiler/helpers/stream_methods.h
@@ -95,6 +95,7 @@ class LexAction;
 class ParseAction;
 class ParseState;
 struct ProductionStep;
+struct PrecedenceRange;
 
 ostream &operator<<(ostream &, const Grammar &);
 ostream &operator<<(ostream &, const GrammarError &);
@@ -106,6 +107,7 @@ ostream &operator<<(ostream &, const LexAction &);
 ostream &operator<<(ostream &, const ParseAction &);
 ostream &operator<<(ostream &, const ParseState &);
 ostream &operator<<(ostream &, const ProductionStep &);
+ostream &operator<<(ostream &, const PrecedenceRange &);
 
 namespace build_tables {