creat empty c++ project for google test.
add google test lib and include files.
set project for using gtest and gmock.
create google test demo and run it successful.
remove gtest debug lib
parse_iterator default construct
run gtest in ide and pause command window
add dad file for test
test std::advance for recognize iterator and algorithm
copy source code of std::advance to test project
parse iterator:implement default and real contruct,operator ==.
parse_iterator: implement copy construct
parse_iterator:implement operator !=
parse_iterator:remove ptr_,implement operator *
parse_iterator:change operator * for return reference type.implement operator ++
parse_iterator ok.
dad_parse_iterator:implement construct
dad_parse_iterator:begin iterator.
dad_parse_iterator: end
dad_parse_iterator:ok!