observers::protocols::ReductionDataFormatter Struct Reference

Conforming classes can create an informative message from reduction data. The message will be printed to screen when the formatter is passed to a reduction action such as observers::Actions::ContributeReductionData. More...

#include <ReductionDataFormatter.hpp>

Classes
struct	test

Detailed Description

Conforming classes can create an informative message from reduction data. The message will be printed to screen when the formatter is passed to a reduction action such as observers::Actions::ContributeReductionData.

Conforming classes must provide the following type aliases:

• reduction_data: The Parallel::ReductionData that the formatter is applicable to.

Conforming classes must implement the following member functions:

• operator(): A call operator that takes the values of the reduction data and returns a std::string. The string should be an informative message such as "Global minimum grid spacing at time 5.4 is: 0.1". It should end with a newline character.
• pup: A PUP function for serialization.

Here's an example for a formatter:

struct FormatErrors
    : tt::ConformsTo<observers::protocols::ReductionDataFormatter> {
  using reduction_data = helpers::reduction_data_from_doubles;
  std::string operator()(const double time, const size_t num_points,
                         const double error1, const double error2) const {
    return "Errors at time " + std::to_string(time) + " over " +
           std::to_string(num_points) +
           " grid points:\n  Field1: " + std::to_string(error1) +
           "\n  Field2: " + std::to_string(error2) + "\n";
  }
  // NOLINTNEXTLINE
  void pup(PUP::er& /*p*/) {}
};

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The documentation for this struct was generated from the following file:

• src/IO/Observer/Protocols/ReductionDataFormatter.hpp