exceptions.h

Go to the documentation of this file.

#ifndef EXCEPTIONS_H
#define EXCEPTIONS_H
 
#include <sstream>
#include <stdexcept>
#include <string>
#include <vector>
 
namespace OscProb {
  //.............................................................................
  inline std::vector<std::string> split(const std::string& s, char delimiter)
  {
    std::string              token;
    std::vector<std::string> tokens;
    std::istringstream       tokenStream(s);
    while (std::getline(tokenStream, token, delimiter)) {
      // Trim leading/trailing whitespace
      size_t first = token.find_first_not_of(" \t\n\r");
      if (std::string::npos != first) {
        size_t last = token.find_last_not_of(" \t\n\r");
        tokens.push_back(token.substr(first, (last - first + 1)));
      }
      else {
        tokens.push_back("");
      }
    }
    return tokens;
  }
 
  //.............................................................................
  template <typename... Args>
  std::string format_args(const std::string& names, const Args&... args)
  {
    std::stringstream ss;
 
    std::vector<std::string> arg_names = split(names, ',');
 
    std::size_t i = 0;
    // Lambda to iterate and print each argument.
    auto printer = [&](const auto& arg_value) {
      if (i < arg_names.size()) {
        if (i > 0) ss << ", ";
        ss << arg_names[i] << " = " << arg_value;
      }
      i++;
    };
    // Unpack the arguments and print them using the lambda.
    (printer(args), ...);
 
    return ss.str();
  }
} // namespace OscProb
 
// Macro to get the most descriptive function name available
#if defined(__GNUC__) || defined(__clang__)
#define FUNCTION_NAME __PRETTY_FUNCTION__
#elif defined(_MSC_VER)
#define FUNCTION_NAME __FUNCSIG__
#else
#define FUNCTION_NAME __func__
#endif
 
// The core macro for throwing an exception with detailed info
#define THROW_ON_INVALID_ARG(condition, ...)                                   \
  do {                                                                         \
    if (!(condition)) {                                                        \
      std::stringstream ss;                                                    \
      ss << "\n    Condition '" << #condition << "' failed."                   \
         << "\n    With: " << OscProb::format_args(#__VA_ARGS__, __VA_ARGS__)  \
         << "\n    In function: " << FUNCTION_NAME                             \
         << "\n    At file: " << __FILE__ << "\n    At line: " << __LINE__;    \
      throw std::invalid_argument(ss.str());                                   \
    }                                                                          \
  }                                                                            \
  while (0)
 
#endif // EXCEPTIONS_H