2 files changed, 21 insertions, 2 deletions
diff --git a/src/expr/command.cpp b/src/expr/command.cpp
index 9edc77e39..43679113c 100644
--- a/src/expr/command.cpp
+++ b/src/expr/command.cpp
@@ -74,11 +74,12 @@ ostream& operator<<(ostream& out, const CommandStatus* s) throw() {
 
 /* class Command */
 
-Command::Command() throw() : d_commandStatus(NULL) {
+Command::Command() throw() : d_commandStatus(NULL), d_muted(false) {
 }
 
 Command::Command(const Command& cmd) {
   d_commandStatus = (cmd.d_commandStatus == NULL) ? NULL : &cmd.d_commandStatus->clone();
+  d_muted = cmd.d_muted;
 }
 
 Command::~Command() throw() {
@@ -98,7 +99,9 @@ bool Command::fail() const throw() {
 
 void Command::invoke(SmtEngine* smtEngine, std::ostream& out) throw() {
   invoke(smtEngine);
-  printResult(out);
+  if(!(isMuted() && ok())) {
+    printResult(out);
+  }
 }
 
 std::string Command::toString() const throw() {
diff --git a/src/expr/command.h b/src/expr/command.h
index 9877044fb..8e5983403 100644
--- a/src/expr/command.h
+++ b/src/expr/command.h
@@ -193,6 +193,12 @@ protected:
    */
   const CommandStatus* d_commandStatus;
 
+  /**
+   * True if this command is "muted"---i.e., don't print "success" on
+   * successful execution.
+   */
+  bool d_muted;
+
 public:
   typedef CommandPrintSuccess printsuccess;
 
@@ -210,6 +216,16 @@ public:
   std::string toString() const throw();
 
   /**
+   * If false, instruct this Command not to print a success message.
+   */
+  void setMuted(bool muted) throw() { d_muted = muted; }
+
+  /**
+   * Determine whether this Command will print a success message.
+   */
+  bool isMuted() throw() { return d_muted; }
+
+  /**
    * Either the command hasn't run yet, or it completed successfully
    * (CommandSuccess, not CommandUnsupported or CommandFailure).
    */