Paul Cadman e2fe830d28 Add support for unsigned 8-bit integer type Byte (#2918) ... This PR adds `Byte` as a builtin with builtin functions for equality, `byte-from-nat` and `byte-to-nat`. The standard library is updated to include this definition with instances for `FromNatural`, `Show` and `Eq` traits. The `FromNatural` trait means that you can assign `Byte` values using non-negative numeric literals. You can use byte literals in jvc files by adding the u8 suffix to a numeric value. For example, 1u8 represents a byte literal. Arithmetic is not supported as the intention is for this type to be used to construct ByteArrays of data where isn't not appropriate to modify using arithmetic operations. We may add a separate `UInt8` type in the future which supports arithmetic. The Byte is supported in the native, rust and Anoma backend. Byte is not supported in the Cairo backend because `byte-from-nat` cannot be defined. The primitive builtin ops for `Byte` are called `OpUInt8ToInt` and `OpUInt8FromInt`, named because these ops work on integers and in future we may reuse these for a separate unsigned 8-bit integer type that supports arithmetic. Part of: * https://github.com/anoma/juvix/issues/2865		2024-08-02 07:43:24 +01:00
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negative	Add error message for ill-scoped variables (#2566)	2024-06-25 16:56:36 +02:00
positive	Add support for unsigned 8-bit integer type Byte (#2918)	2024-08-02 07:43:24 +01:00