Function valid_name_string

simcore/framework/src/cli/cli.hpp:310–315

Verify an option name

/// Verify an option name
inline bool valid_name_string(const std::string &str) {
  if (str.empty() || !valid_first_char(str[0])) return false;
  for (auto c : str.substr(1))
    if (!valid_later_char(c)) return false;
  return true;
}

/// Verify that str consists of letters only
inline bool isalpha(const std::string &str) {