Move equation conversion exception to exception utils

Author: NlightNFotis

src/goto-symex/equation_conversion_exceptions.h

@@ -15,6 +15,7 @@ Author: Daniel Kroening, [email protected]
 #include <util/std_expr.h>
 #include <util/throw_with_nested.h>
 #include <util/unwrap_nested_exception.h>
+#include <util/exception_utils.h>
 
 // Can be removed once deprecated SSA_stept::output is removed
 #include <langapi/language_util.h>
@@ -24,7 +25,6 @@ Author: Daniel Kroening, [email protected]
 #include <solvers/prop/prop.h>
 #include <solvers/prop/prop_conv.h>
 
-#include "equation_conversion_exceptions.h"
 #include "goto_symex_state.h"
 
 /// read from a shared variable

src/goto-symex/symex_target_equation.cpp

@@ -10,6 +10,11 @@ Author: Fotis Koutoulakis, [email protected]
 #define CPROVER_UTIL_EXCEPTION_UTILS_H
 
 #include <string>
+#include <sstream>
+
+#include <goto-symex/symex_target_equation.h>
+
+#include "format_expr.h"
 
 class invalid_user_input_exceptiont
 {
@@ -38,4 +43,31 @@ class invalid_user_input_exceptiont
   }
 };
 
+
+class equation_conversion_exceptiont : public std::runtime_error
+{
+public:
+  equation_conversion_exceptiont(
+    const std::string &message,
+    const symex_target_equationt::SSA_stept &step)
+    : runtime_error(message), step(step)
+  {
+    std::ostringstream error_msg;
+    error_msg << runtime_error::what();
+    error_msg << "\nSource GOTO statement: " << format(step.source.pc->code);
+    error_msg << "\nStep:\n";
+    step.output(error_msg);
+    error_message = error_msg.str();
+  }
+
+  const char *what() const optional_noexcept override
+  {
+    return error_message.c_str();
+  }
+
+private:
+  symex_target_equationt::SSA_stept step;
+  std::string error_message;
+};
+
 #endif // CPROVER_UTIL_EXCEPTION_UTILS_H