Ak 44493 infer predicate#45298

Merged

bors merged 1 commit intorust-lang:masterfrom toidiu:ak-44493-infer-predicate

Apr 13, 2018

+1,415-21

Commits on Apr 12, 2018

Implement inferring outlives requirements for references, structs, enum, union, and projection types. added a feature gate and tests for these scenarios.
toidiu
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