Add helper get_as function.
Add helper get_as function.

Payshares/cpptoml,skystrife/cpptoml,vadz/cpptoml,Nephatrine/cpptoml,skystrife/cpptoml,vadz/cpptoml,Nephatrine/cpptoml,Payshare/cpptoml,zzzworm/cpptoml