diff options
Diffstat (limited to 'impl/Operator.hpp')
| -rw-r--r-- | impl/Operator.hpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/impl/Operator.hpp b/impl/Operator.hpp index f9a80f3..9f17cbf 100644 --- a/impl/Operator.hpp +++ b/impl/Operator.hpp @@ -9,6 +9,7 @@ template<typename T> struct Operator { virtual const T eval(const std::vector< Expression<T> >&, const std::map<std::string, T>&) const = 0; + virtual std::string output() const = 0; }; #include "Expression.hpp" |