Resolve several ExpectedT<T> problems#511

Merged

BillyONeal merged 28 commits intomicrosoft:mainfrom BillyONeal:cleanup-expected

May 26, 2022

+1,023-465

Commits on Apr 16, 2022

Simplify expected by deleting ErrorHolder since we never actually used E = std::error_code.
BillyONeal
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Replace bespoke error-to-string functionality with fmt.
BillyONeal
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Allow not-default-constructible error types in expected.all_of
BillyONeal
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Commits on Apr 19, 2022

Merge remote-tracking branch 'origin/main' into cleanup-expected
BillyONeal
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Guard calls to error() for the expected being in the error state.
BillyONeal
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Commits on Apr 20, 2022

Merge remote-tracking branch 'origin/main' into cleanup-expected
BillyONeal
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Commits on Apr 21, 2022

Attempt to fix build errors on POSIX
BillyONeal
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Commits on Apr 23, 2022

Fix parameters not being forwarded by constructors, and add unit tests.
BillyONeal
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Commits on Apr 24, 2022