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Summary: This makes it possible to run an arbitrary matcher on the value contained within the Expected<T> object. To do this, I've needed to fully spell out the matcher, instead of using the shorthand MATCHER_P macro. The slight gotcha here is that standard template deduction will fail if one tries to match HasValue(47) against an Expected<int &> -- the workaround is to use HasValue(testing::Eq(47)). The explanations produced by this matcher have changed a bit, since now we delegate to the nested matcher to print the value. Since these don't put quotes around the value, I've changed our PrintTo methods to match. Reviewers: zturner Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D41065 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@320561 91177308-0d34-0410-b5e6-96231b3b80d8