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Swift: How to make single-character Strings work in a UInt8 raw value enum

https://gist.github.com/danhd123/c1dc8242f48ace176cf8

by icodestuff • 11 years ago

1 1 11 years ago

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gist.github.com

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icodestuff• 11 years ago

The motivation for this was trying to parse a binary file with a discriminated union, with the tag being a single byte representing one of several ASCII characters. Since Swift doesn't have single byte character literals like single-quoted characters in C, UInt8 raw value enums required decimal or hexadecimal integer literals, which really hurts readability; 0x42 is strictly worse than 'B'. As a StringLiteralConvertible, "B" is an acceptable value for a UInt8 case.

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