Primitive Types

Every primitive type in Rux, by family — 38 of them, every one implemented by rux 0.4.0. The names are predefined type names, not keywords.

Type	Family	Bits	Bytes	Holds	Literal
`int8`	Signed integer	8	1	−128 to 127	`i8`
`int16`	Signed integer	16	2	−32,768 to 32,767	`i16`
`int32`	Signed integer	32	4	−2³¹ to 2³¹ − 1	`i32`
`int64`	Signed integer	64	8	−2⁶³ to 2⁶³ − 1	`i64`
`int128`	Signed integer	128	16	−2¹²⁷ to 2¹²⁷ − 1	`i128`
`int256`	Signed integer	256	32	−2²⁵⁵ to 2²⁵⁵ − 1	`i256`
`int512`	Signed integer	512	64	−2⁵¹¹ to 2⁵¹¹ − 1	`i512`
`int`	Signed integer	64	8	Pointer-sized; as `int64` on every supported target	`i`, or none
`uint8`	Unsigned integer	8	1	0 to 255	`u8`
`uint16`	Unsigned integer	16	2	0 to 65,535	`u16`
`uint32`	Unsigned integer	32	4	0 to 2³² − 1	`u32`
`uint64`	Unsigned integer	64	8	0 to 2⁶⁴ − 1	`u64`
`uint128`	Unsigned integer	128	16	0 to 2¹²⁸ − 1	`u128`
`uint256`	Unsigned integer	256	32	0 to 2²⁵⁶ − 1	`u256`
`uint512`	Unsigned integer	512	64	0 to 2⁵¹² − 1	`u512`
`uint`	Unsigned integer	64	8	Pointer-sized; as `uint64` on every supported target	`u`
`float8`	Floating-point	8	1	E4M3, with infinities and NaNs	`f8`
`float16`	Floating-point	16	2	IEEE 754 binary16	`f16`
`float32`	Floating-point	32	4	IEEE 754 binary32	`f32`
`float64`	Floating-point	64	8	IEEE 754 binary64	`f64`, or none
`float80`	Floating-point	80	16	x87 extended precision, 80 bits in 16 bytes	`f80`
`float128`	Floating-point	128	16	IEEE 754 binary128	`f128`
`float256`	Floating-point	256	32	IEEE 754 binary256	`f256`
`float512`	Floating-point	512	64	binary512: 23-bit exponent, 489 bits of precision	`f512`
`bool8`	Boolean	8	1	`false`, `true`	`true`, `false`
`bool16`	Boolean	16	2	`false`, `true`	—
`bool32`	Boolean	32	4	`false`, `true`	—
`bool64`	Boolean	64	8	`false`, `true`	—
`bool128`	Boolean	128	16	`false`, `true`	—
`bool256`	Boolean	256	32	`false`, `true`	—
`bool512`	Boolean	512	64	`false`, `true`	—
`char8`	Character	8	1	A UTF-8 code unit, 0 to 255	`c8'…'`
`char16`	Character	16	2	A UTF-16 code unit, 0 to 65,535	`c16'…'`
`char32`	Character	32	4	A Unicode scalar value	`c32'…'`, or none
`char64`	Character	64	8	A Unicode scalar value	`c64'…'`
`char128`	Character	128	16	A Unicode scalar value	`c128'…'`
`char256`	Character	256	32	A Unicode scalar value	`c256'…'`
`char512`	Character	512	64	A Unicode scalar value	`c512'…'`

Built-in aliases

Alias	Same type as
`bool`	`bool8`
`byte`	`uint8`
`char`	`char32`
`float`	`float64`

An alias is another name for its target, not a separate type; see Type Aliases.

Defaults

An unsuffixed integer literal is an int, unless its context requires another integer type.
An unsuffixed floating-point literal is a float64.
An unprefixed character literal is a char32, unless it initialises a char8 or char16.
An unprefixed string literal is a char8[..].

Associated constants

Each primitive is extended with constants in Core, available once that extension is imported, as in import Core::int32;. The types themselves are built in and need no import:

Family	Constants
Integers	`Bits`, `Bytes`, `Min`, `Max`
Floating-point	`Bits`, `Bytes`, `Lowest`, `Max`, `MinPositive`, `Epsilon`, `Infinity`, `NaN`
Booleans	`Bits`, `Bytes`
Characters	`Bits`, `Bytes`, `Min`, `Max`

Primitive Types

Built-in aliases

Defaults

Associated constants

See also