3 Commits (develop)

Author	SHA1	Message	Date
liym27	cd348dc467	API (case) error message enhancement. test=develop (#23428)	6 years ago
liym27	7d8d45991a	control flow: support optimizer called (#21851) ... * append optimize op in the grad block of current block if current block is in control flow. test=develop * add conditional grad op when optimizer used in control flow. test=develop * add comment and modify typo. test=develop * fix append_backward to support control flow. test=develop * add test. test=develop * fix copy_var_to_parent_block and conditional_block_grad. test=develop * fix bug: revert to append conditional_block_grad vars to sub grad block. test=develop * fix bug: revert to assign var to parent block even if var already is in parent block * fix bug: consider outputs is empty. test=develop * move _rename_grad_ out. test=develop * modify code according to reviews from Huihuang. test=develop * modify code according to reviews from Jinle. test=develop	6 years ago
liym27	b0fc822747	Add control flow api: case (#21114) ... * add control flow API: case. test=develop * delete 'raise TypeError' in _error_message() and return a string. test=develop * polish API document. test=develop	6 years ago