1[def __foo__ Foo:__FILENAME__] 2 3__foo__ 4 5[?__defined__ 6Defined conditional phrase. 7[template defined_template Defined template:__FILENAME__] 8[def __defined_macro__ Defined macro:__FILENAME__] 9] 10 11[?__not_defined__ 12Not defined conditional phrase. 13[template not_defined_template Not defined template:__FILENAME__] 14[def __not_defined_macro__ Not defined macro:__FILENAME__] 15]