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rustc/vendor/either/README-crates.io.md
Ximin Luo a1dfa0c682 New upstream version 1.32.0~beta.2+dfsg1
2018-12-16 10:13:16 -08:00

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The enum Either with variants Left and Right is a general purpose sum type with two cases.

Either has methods that are similar to Option and Result, and it also implements traits like Iterator.

Includes macros try_left!() and try_right!() to use for short-circuiting logic, similar to how the ? operator is used with Result. Note that Either is general purpose. For describing success or error, use the regular Result.