Commits
zxu authored and GitHub committed cac2c3ff7aa
implement FieldValue for null, boolean, and array in C++. (#637) * implement FieldValue for null and boolean. * refactoring to use union type instead of poly * refactor using union design intead of poly * refactoring to use anonymous union and fix styles * small fix * add field_value_test to the project * fix warning of cmake and fix style