BufferOverflowException if there isn't enough data to read.
t { Buffer buffer = new Buffer([1, 2]); assert(buffer.peek!int() == 1); assert(buffer.rindex == 0); assert(buffer.peek!int() == buffer.read!int()); assert(buffer.rindex == 4); assert(buffer.peek!int() == 2);
Peeks some data using the system's endianness.