Use visitor instead of pulling values directly
Sensor thresholds pull out an int64_t and immediately
assign it to a double. Use a visitor instead to avoid
the intermediate and add flexibility / saftey to type
readings.
Tested-By: Verifed sensor list still worked.
Change-Id: If49bf54ec1c0636b3549d433b86ecdbd1ea99b0d
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/sensorhandler.cpp b/sensorhandler.cpp
index ee62e17..609fdfd 100644
--- a/sensorhandler.cpp
+++ b/sensorhandler.cpp
@@ -619,8 +619,10 @@
info.sensorPath,
warningThreshIntf);
- double warnLow = warnThresholds["WarningLow"].get<int64_t>();
- double warnHigh = warnThresholds["WarningHigh"].get<int64_t>();
+ double warnLow = mapbox::util::apply_visitor(ipmi::VariantToDoubleVisitor(),
+ warnThresholds["WarningLow"]);
+ double warnHigh = mapbox::util::apply_visitor(
+ ipmi::VariantToDoubleVisitor(), warnThresholds["WarningHigh"]);
if (warnLow != 0)
{
@@ -644,8 +646,10 @@
service,
info.sensorPath,
criticalThreshIntf);
- double critLow = critThresholds["CriticalLow"].get<int64_t>();
- double critHigh = critThresholds["CriticalHigh"].get<int64_t>();
+ double critLow = mapbox::util::apply_visitor(ipmi::VariantToDoubleVisitor(),
+ critThresholds["CriticalLow"]);
+ double critHigh = mapbox::util::apply_visitor(
+ ipmi::VariantToDoubleVisitor(), critThresholds["CriticalHigh"]);
if (critLow != 0)
{
diff --git a/utils.hpp b/utils.hpp
index 75a3252..535ea66 100644
--- a/utils.hpp
+++ b/utils.hpp
@@ -208,6 +208,27 @@
const std::string& path,
InterfaceList&& interfaces);
+/** @struct VariantToDoubleVisitor
+ * @brief Visitor to convert variants to doubles
+ * @details Performs a static cast on the underlying type
+ */
+struct VariantToDoubleVisitor
+{
+ template <typename T>
+ std::enable_if_t<std::is_arithmetic<T>::value, double>
+ operator()(const T &t) const
+ {
+ return static_cast<double>(t);
+ }
+
+ template <typename T>
+ std::enable_if_t<!std::is_arithmetic<T>::value, double>
+ operator()(const T &t) const
+ {
+ throw std::invalid_argument("Cannot translate type to double");
+ }
+};
+
namespace method_no_args
{