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-rw-r--r--cpp/013run3
1 files changed, 2 insertions, 1 deletions
diff --git a/cpp/013run b/cpp/013run
index fa7e3468..5173f6f3 100644
--- a/cpp/013run
+++ b/cpp/013run
@@ -118,8 +118,9 @@ recipes_added_by_test.clear();
 //: beware: overridden in later layers
 vector<int> read_memory(reagent x) {
 //?   cout << "read_memory: " << x.to_string() << '\n'; //? 1
+  static const int LITERAL = Type_number["literal"];
   vector<int> result;
-  if (x.types[0] == 0) {  // literal
+  if (x.types[0] == LITERAL) {
     result.push_back(x.value);
     return result;
   }