Fix two missing_const_for_fn false positives#3844

Merged

bors merged 2 commits intorust-lang:masterfrom

phansch:const_fn_external_macro

Mar 5, 2019

Commits on Mar 4, 2019

Don't trigger missing_const_for_fn in external macros
phansch
committed

Commits on Mar 5, 2019

Fix missing_const_for_fn for impl trait methods
phansch
committed