Revision ecfbf6b89ebd47d7a51ea5552f176c65d32a3dc3 authored by Mitzi Morris on 20 March 2022, 16:48:26 UTC, committed by Mitzi Morris on 20 March 2022, 16:48:26 UTC
1 parent dcdd3d6
validate_zero_buf.hpp
#ifndef STAN_IO_VALIDATE_ZERO_BUF_HPP
#define STAN_IO_VALIDATE_ZERO_BUF_HPP
#include <boost/lexical_cast/bad_lexical_cast.hpp>
#include <string>
namespace stan {
namespace io {
/**
* Throw an bad-cast exception if the specified buffer contains
* a digit other than 0 before an e or E. The buffer argument
* must implement <code>size_t size()</code> method and <code>char
* operator[](size_t)</code>.
*
* @tparam B Character buffer type
* @throw <code>boost::bad_lexical_cast</code> if the buffer
* contains non-zero characters before an exponentiation symbol.
*/
template <typename B>
void validate_zero_buf(const B& buf) {
for (size_t i = 0; i < buf.size(); ++i) {
if (buf[i] == 'e' || buf[i] == 'E')
return;
if (buf[i] >= '1' && buf[i] <= '9')
boost::conversion::detail::throw_bad_cast<std::string, double>();
}
}
} // namespace io
} // namespace stan
#endif
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