Nat8

motoko name=import
import Nat8 "mo:core/Nat8";

type Nat8 = Prim.Types.Nat8

8-bit natural numbers.

public let maxValue : Nat8

Maximum 8-bit natural number. 2 ** 8 - 1.

Example:

motoko include=import
assert Nat8.maxValue == (255 : Nat8);

public func toNat(self : Nat8) : Nat

Converts an 8-bit unsigned integer to an unsigned integer with infinite precision.

Example:

motoko include=import
assert Nat8.toNat(123) == (123 : Nat);

public func fromNat(_ : Nat) : Nat8

Converts an unsigned integer with infinite precision to an 8-bit unsigned integer.

Traps on overflow.

Example:

motoko include=import
assert Nat8.fromNat(123) == (123 : Nat8);

public func fromNat16(_ : Nat16) : Nat8

Converts a 16-bit unsigned integer to a 8-bit unsigned integer.

Traps on overflow.

Example:

motoko include=import
assert Nat8.fromNat16(123) == (123 : Nat8);

public func toNat16(self : Nat8) : Nat16

Converts an 8-bit unsigned integer to a 16-bit unsigned integer.

Example:

motoko include=import
assert Nat8.toNat16(123) == (123 : Nat16);

public func fromIntWrap(_ : Int) : Nat8

Converts a signed integer with infinite precision to an 8-bit unsigned integer.

Wraps on overflow/underflow.

Example:

motoko include=import
assert Nat8.fromIntWrap(123) == (123 : Nat8);

public func toText(self : Nat8) : Text

Converts x to its textual representation.

Example:

motoko include=import
assert Nat8.toText(123) == ("123" : Text);

public func min(x : Nat8, y : Nat8) : Nat8

Returns the minimum of x and y.

Example:

motoko include=import
assert Nat8.min(123, 200) == (123 : Nat8);

public func max(x : Nat8, y : Nat8) : Nat8

Returns the maximum of x and y.

Example:

motoko include=import
assert Nat8.max(123, 200) == (200 : Nat8);

public func equal(x : Nat8, y : Nat8) : Bool

Equality function for Nat8 types. This is equivalent to x == y.

Example:

motoko include=import
assert Nat8.equal(1, 1);
assert (1 : Nat8) == (1 : Nat8);

Note: The reason why this function is defined in this library (in addition to the existing == operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use == as a function value at the moment.

Example:

motoko include=import
let a : Nat8 = 111;
let b : Nat8 = 222;
assert not Nat8.equal(a, b);

public func notEqual(x : Nat8, y : Nat8) : Bool

Inequality function for Nat8 types. This is equivalent to x != y.

Example:

motoko include=import
assert Nat8.notEqual(1, 2);
assert (1 : Nat8) != (2 : Nat8);

Note: The reason why this function is defined in this library (in addition to the existing != operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use != as a function value at the moment.

public func less(x : Nat8, y : Nat8) : Bool

"Less than" function for Nat8 types. This is equivalent to x < y.

Example:

motoko include=import
assert Nat8.less(1, 2);
assert (1 : Nat8) < (2 : Nat8);

Note: The reason why this function is defined in this library (in addition to the existing < operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use < as a function value at the moment.

public func lessOrEqual(x : Nat8, y : Nat8) : Bool

"Less than or equal" function for Nat8 types. This is equivalent to x <= y.

Example:

motoko include=import
assert Nat8.lessOrEqual(1, 2);
assert 1 <= 2;

Note: The reason why this function is defined in this library (in addition to the existing <= operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use <= as a function value at the moment.

public func greater(x : Nat8, y : Nat8) : Bool

"Greater than" function for Nat8 types. This is equivalent to x > y.

Example:

motoko include=import
assert Nat8.greater(2, 1);
assert (2 : Nat8) > (1 : Nat8);

Note: The reason why this function is defined in this library (in addition to the existing > operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use > as a function value at the moment.

public func greaterOrEqual(x : Nat8, y : Nat8) : Bool

"Greater than or equal" function for Nat8 types. This is equivalent to x >= y.

Example:

motoko include=import
assert Nat8.greaterOrEqual(2, 1);
assert (2 : Nat8) >= (1 : Nat8);

Note: The reason why this function is defined in this library (in addition to the existing >= operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use >= as a function value at the moment.

public func compare(x : Nat8, y : Nat8) : Order.Order

General purpose comparison function for Nat8. Returns the Order ( either #less, #equal, or #greater) of comparing x with y.

Example:

motoko include=import
assert Nat8.compare(2, 3) == #less;

This function can be used as value for a high order function, such as a sort function.

Example:

motoko include=import
import Array "mo:core/Array";
assert Array.sort([2, 3, 1] : [Nat8], Nat8.compare) == [1, 2, 3];

public func add(x : Nat8, y : Nat8) : Nat8

Returns the sum of x and y, x + y. Traps on overflow.

Example:

motoko include=import
assert Nat8.add(1, 2) == 3;
assert (1 : Nat8) + (2 : Nat8) == 3;

Note: The reason why this function is defined in this library (in addition to the existing + operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use + as a function value at the moment.

Example:

motoko include=import
import Array "mo:core/Array";
assert Array.foldLeft<Nat8, Nat8>([2, 3, 1], 0, Nat8.add) == 6;

public func sub(x : Nat8, y : Nat8) : Nat8

Returns the difference of x and y, x - y. Traps on underflow.

Example:

motoko include=import
assert Nat8.sub(2, 1) == 1;
assert (2 : Nat8) - (1 : Nat8) == 1;

Note: The reason why this function is defined in this library (in addition to the existing - operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use - as a function value at the moment.

Example:

motoko include=import
import Array "mo:core/Array";
assert Array.foldLeft<Nat8, Nat8>([2, 3, 1], 20, Nat8.sub) == 14;

public func mul(x : Nat8, y : Nat8) : Nat8

Returns the product of x and y, x * y. Traps on overflow.

Example:

motoko include=import
assert Nat8.mul(2, 3) == 6;
assert (2 : Nat8) * (3 : Nat8) == 6;

Note: The reason why this function is defined in this library (in addition to the existing * operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use * as a function value at the moment.

Example:

motoko include=import
import Array "mo:core/Array";
assert Array.foldLeft<Nat8, Nat8>([2, 3, 1], 1, Nat8.mul) == 6;

public func div(x : Nat8, y : Nat8) : Nat8

Returns the quotient of x divided by y, x / y. Traps when y is zero.

Example:

motoko include=import
assert Nat8.div(6, 2) == 3;
assert (6 : Nat8) / (2 : Nat8) == 3;

Note: The reason why this function is defined in this library (in addition to the existing / operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use / as a function value at the moment.

public func rem(x : Nat8, y : Nat8) : Nat8

Returns the remainder of x divided by y, x % y. Traps when y is zero.

Example:

motoko include=import
assert Nat8.rem(6, 4) == 2;
assert (6 : Nat8) % (4 : Nat8) == 2;

Note: The reason why this function is defined in this library (in addition to the existing % operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use % as a function value at the moment.

public func pow(x : Nat8, y : Nat8) : Nat8

Returns x to the power of y, x ** y. Traps on overflow.

Example:

motoko include=import
assert Nat8.pow(2, 3) == 8;
assert (2 : Nat8) ** (3 : Nat8) == 8;

Note: The reason why this function is defined in this library (in addition to the existing ** operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use ** as a function value at the moment.

public func bitnot(x : Nat8) : Nat8

Returns the bitwise negation of x, ^x.

Example:

motoko include=import
assert Nat8.bitnot(0) == 255;
assert ^(0 : Nat8) == 255;

Note: The reason why this function is defined in this library (in addition to the existing ^ operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use ^ as a function value at the moment.

public func bitand(x : Nat8, y : Nat8) : Nat8

Returns the bitwise and of x and y, x & y.

Example:

motoko include=import
assert Nat8.bitand(3, 2) == 2;
assert (3 : Nat8) & (2 : Nat8) == 2;

Note: The reason why this function is defined in this library (in addition to the existing & operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use & as a function value at the moment.

public func bitor(x : Nat8, y : Nat8) : Nat8

Returns the bitwise or of x and y, x | y.

Example:

motoko include=import
assert Nat8.bitor(3, 2) == 3;
assert (3 : Nat8) | (2 : Nat8) == 3;

Note: The reason why this function is defined in this library (in addition to the existing | operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use | as a function value at the moment.

public func bitxor(x : Nat8, y : Nat8) : Nat8

Returns the bitwise exclusive or of x and y, x ^ y.

Example:

motoko include=import
assert Nat8.bitxor(3, 2) == 1;
assert (3 : Nat8) ^ (2 : Nat8) == 1;

Note: The reason why this function is defined in this library (in addition to the existing ^ operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use ^ as a function value at the moment.

public func bitshiftLeft(x : Nat8, y : Nat8) : Nat8

Returns the bitwise shift left of x by y, x << y.

Example:

motoko include=import
assert Nat8.bitshiftLeft(1, 2) == 4;
assert (1 : Nat8) << (2 : Nat8) == 4;

Note: The reason why this function is defined in this library (in addition to the existing << operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use << as a function value at the moment.

public func bitshiftRight(x : Nat8, y : Nat8) : Nat8

Returns the bitwise shift right of x by y, x >> y.

Example:

motoko include=import
assert Nat8.bitshiftRight(4, 2) == 1;
assert (4 : Nat8) >> (2 : Nat8) == 1;

Note: The reason why this function is defined in this library (in addition to the existing >> operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use >> as a function value at the moment.

public func bitrotLeft(x : Nat8, y : Nat8) : Nat8

Returns the bitwise rotate left of x by y, x <<> y.

Example:

motoko include=import
assert Nat8.bitrotLeft(128, 1) == 1;
assert (128 : Nat8) <<> (1 : Nat8) == 1;

Note: The reason why this function is defined in this library (in addition to the existing <<> operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use <<> as a function value at the moment.

public func bitrotRight(x : Nat8, y : Nat8) : Nat8

Returns the bitwise rotate right of x by y, x <>> y.

Example:

motoko include=import
assert Nat8.bitrotRight(1, 1) == 128;
assert (1 : Nat8) <>> (1 : Nat8) == 128;

Note: The reason why this function is defined in this library (in addition to the existing <>> operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use <>> as a function value at the moment.

public func bittest(x : Nat8, p : Nat) : Bool

Returns the value of bit p mod 8 in x, (x & 2^(p mod 8)) == 2^(p mod 8). This is equivalent to checking if the p-th bit is set in x, using 0 indexing.

Example:

motoko include=import
assert Nat8.bittest(5, 2);

public func bitset(x : Nat8, p : Nat) : Nat8

Returns the value of setting bit p mod 8 in x to 1.

Example:

motoko include=import
assert Nat8.bitset(5, 1) == 7;

public func bitclear(x : Nat8, p : Nat) : Nat8

Returns the value of clearing bit p mod 8 in x to 0.

Example:

motoko include=import
assert Nat8.bitclear(5, 2) == 1;

public func bitflip(x : Nat8, p : Nat) : Nat8

Returns the value of flipping bit p mod 8 in x.

Example:

motoko include=import
assert Nat8.bitflip(5, 2) == 1;

public func bitcountNonZero(x : Nat8) : Nat8

Returns the count of non-zero bits in x.

Example:

motoko include=import
assert Nat8.bitcountNonZero(5) == 2;

public func bitcountLeadingZero(x : Nat8) : Nat8

Returns the count of leading zero bits in x.

Example:

motoko include=import
assert Nat8.bitcountLeadingZero(5) == 5;

public func bitcountTrailingZero(x : Nat8) : Nat8

Returns the count of trailing zero bits in x.

Example:

motoko include=import
assert Nat8.bitcountTrailingZero(6) == 1;

public func addWrap(x : Nat8, y : Nat8) : Nat8

Returns the sum of x and y, x +% y. Wraps on overflow.

Example:

motoko include=import
assert Nat8.addWrap(230, 26) == 0;
assert (230 : Nat8) +% (26 : Nat8) == 0;

Note: The reason why this function is defined in this library (in addition to the existing +% operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use +% as a function value at the moment.

public func subWrap(x : Nat8, y : Nat8) : Nat8

Returns the difference of x and y, x -% y. Wraps on underflow.

Example:

motoko include=import
assert Nat8.subWrap(0, 1) == 255;
assert (0 : Nat8) -% (1 : Nat8) == 255;

Note: The reason why this function is defined in this library (in addition to the existing -% operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use -% as a function value at the moment.

public func mulWrap(x : Nat8, y : Nat8) : Nat8

Returns the product of x and y, x *% y. Wraps on overflow.

Example:

motoko include=import
assert Nat8.mulWrap(230, 26) == 92;
assert (230 : Nat8) *% (26 : Nat8) == 92;

Note: The reason why this function is defined in this library (in addition to the existing *% operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use *% as a function value at the moment.

public func powWrap(x : Nat8, y : Nat8) : Nat8

Returns x to the power of y, x **% y. Wraps on overflow.

Example:

motoko include=import
assert Nat8.powWrap(2, 8) == 0;
assert (2 : Nat8) **% (8 : Nat8) == 0;

Note: The reason why this function is defined in this library (in addition to the existing **% operator) is so that you can use it as a function value to pass to a higher order function. It is not possible to use **% as a function value at the moment.

public func range(fromInclusive : Nat8, toExclusive : Nat8) : Iter.Iter<Nat8>

Returns an iterator over Nat8 values from the first to second argument with an exclusive upper bound.

motoko include=import
import Iter "mo:core/Iter";

let iter = Nat8.range(1, 4);
assert iter.next() == ?1;
assert iter.next() == ?2;
assert iter.next() == ?3;
assert iter.next() == null;

If the first argument is greater than the second argument, the function returns an empty iterator.

motoko include=import
import Iter "mo:core/Iter";

let iter = Nat8.range(4, 1);
assert iter.next() == null; // empty iterator

public func rangeInclusive(from : Nat8, to : Nat8) : Iter.Iter<Nat8>

Returns an iterator over Nat8 values from the first to second argument, inclusive.

motoko include=import
import Iter "mo:core/Iter";

let iter = Nat8.rangeInclusive(1, 3);
assert iter.next() == ?1;
assert iter.next() == ?2;
assert iter.next() == ?3;
assert iter.next() == null;

If the first argument is greater than the second argument, the function returns an empty iterator.

motoko include=import
import Iter "mo:core/Iter";

let iter = Nat8.rangeInclusive(4, 1);
assert iter.next() == null; // empty iterator

public func allValues() : Iter.Iter<Nat8>

Returns an iterator over all Nat8 values, from 0 to maxValue.

motoko include=import
import Iter "mo:core/Iter";

let iter = Nat8.allValues();
assert iter.next() == ?0;
assert iter.next() == ?1;
assert iter.next() == ?2;
// ...