void parse (StringParser& p, T& out) {
size_t start = p.pos ();
std::istringstream stream (p.value ().substr (start));
std::istream& stream2 (stream);
stream2 >> out;
if (stream.fail ()) {
stream.clear ();
std::streampos pos = stream.tellg ();
ASSERT (pos >= 0);
throw ParseException (typeid (T), p.value (), start, start + (size_t) pos, "operator>> failed");
}
stream.clear (); // Needed (for clearing EOF bit?), otherwise stream.tellg() fails (returns -1)
std::streampos pos = stream.tellg ();
ASSERT (pos >= 0);
p.skip ((size_t) pos);
}
void parse (StringParser& p, std::complex<F>& out) {
size_t start = p.pos ();
F real, imag;
parse (p, real);
size_t pos = p.pos ();
p.skipWs ();
size_t pos2 = p.pos ();
char sign = p.read ();
if (sign == '+' || sign == '-') {
p.skipWs ();
if (p.peek () == 'i' || p.peek () == 'I') {
p.read ();
imag = sign == '+' ? 1 : -1;
} else {
p.seek (pos2);
parse (p, imag);
p.skipWs ();
char c = p.read ();
if (c != 'i' && c != 'I') {
throw ParseException (typeid (std::complex<F>), p.value (), start, p.pos () - 1, "Expected `i' oder `I' after imaginary part");
}
}
out = std::complex<F> (real, imag);
} else {
p.seek (pos);
out = std::complex<F> (real, 0);
}
}
void parse (const std::string& s, T& out) {
StringParser p (s);
parse (p, out);
p.skipWs ();
if (!p.eof ())
throw ParseException (typeid (T), p.value (), 0, p.pos (), "Got garbage at end of string");
}
