diff options
Diffstat (limited to 'src/uscxml/plugins/datamodel/prolog/swi/SWIDataModel.cpp')
| -rw-r--r-- | src/uscxml/plugins/datamodel/prolog/swi/SWIDataModel.cpp | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/uscxml/plugins/datamodel/prolog/swi/SWIDataModel.cpp b/src/uscxml/plugins/datamodel/prolog/swi/SWIDataModel.cpp index c92274c..2e37b29 100644 --- a/src/uscxml/plugins/datamodel/prolog/swi/SWIDataModel.cpp +++ b/src/uscxml/plugins/datamodel/prolog/swi/SWIDataModel.cpp @@ -264,13 +264,17 @@ void SWIDataModel::eval(const std::string& expr) { } bool SWIDataModel::evalAsBool(const std::string& expr) { - PlCompound compound(expr.c_str()); - PlTermv termv(compound.arity()); - for (int i = 0; i < compound.arity(); i++) { - termv[i] = compound[i + 1]; + try { + PlCompound compound(expr.c_str()); + PlTermv termv(compound.arity()); + for (int i = 0; i < compound.arity(); i++) { + termv[i] = compound[i + 1]; + } + PlQuery query(compound.name(), termv); + return query.next_solution() > 0; + } catch(...) { + return false; } - PlQuery query(compound.name(), termv); - return query.next_solution() > 0; } std::string SWIDataModel::evalAsString(const std::string& expr) { |