Fix compile error

Signed-off-by: Kohei Takahashi <flast@flast.jp>
Use combined_range directly

Signed-off-by: Kohei Takahashi <flast@flast.jp>
Merge pull request #16 from Flast/pr/zip_range

Use combined_range instead of zip_range
Merge upstream branch 'faithandbrave/master'