Merge pull request idaholab#18462 from parikshitbajpai/vector-pairs-u…

…tility

Add utility function to create vector of pairs from two input parameters

framework/include/base/MooseObject.h

@@ -87,6 +87,16 @@ class MooseObject : public ConsoleStreamInterface, public libMesh::ParallelObjec
   template <typename T>
   const T & getParam(const std::string & name) const;
 
+  /**
+   * Retrieve two parameters and provide pair of parameters for the object
+   * @param param1 The name of first parameter
+   * @param param2 The name of second parameter
+   * @return Vector of pairs of first and second parameters
+   */
+  template <typename T1, typename T2>
+  std::vector<std::pair<T1, T2>> getParamPairs(const std::string & param1,
+                                               const std::string & param2) const;
+
   /**
    * Verifies that the requested parameter exists and is not NULL and returns it to the caller.
    * The template parameter must be a pointer or an error will be thrown.
@@ -255,6 +265,25 @@ MooseObject::getParam(const std::string & name) const
   return InputParameters::getParamHelper(name, _pars, static_cast<T *>(0));
 }
 
+template <typename T1, typename T2>
+std::vector<std::pair<T1, T2>>
+MooseObject::getParamPairs(const std::string & param1, const std::string & param2) const
+{
+  auto v1 = getParam<std::vector<T1>>(param1);
+  auto v2 = getParam<std::vector<T2>>(param2);
+
+  if (v1.size() != v2.size())
+    callMooseErrorRaw("Vector parameters " + paramErrorPrefix(_pars, param1) +
+                          "(size: " + v1.size() + ") and " + paramErrorPrefix(_pars, param2) +
+                          "(size: " + v2.size() + ") are of different lengths \n",
+                      &_app);
+
+  std::vector<std::pair<T1, T2>> parameter_pair;
+  for (std::size_t i = 0; i < v1.size(); ++i)
+    parameter_pair.emplace_back(std::make_pair(v1[i], v2[i]));
+  return parameter_pair;
+}
+
 template <typename... Args>
 [[noreturn]] void
 MooseObject::paramError(const std::string & param, Args... args) const