has_interval

absolute value using `|a|` built from a `prefix |` and `postfix |` as an operator
alias of `a.abs`

Due to the low precedence of `|`, this works also on expressions like `|a-b|`, even
with spaces `| a-b |`, `|a - b|`, `| a-b|` or `|a-b |`.

Nesting, however, does not work, e.g, `| - |a| |`, this requires parenthese `|(- |a|)|`.

NYI: CLEANUP: Due to #3081, we need `postfix |` as the first operation, should be
`prefix |` first

absolute value

convert this to a decimal number in a string. If negative, add "-" as
the first character.

convert this to a number using the given base. If negative, add "-" as
the first character.

convert this to a number using the given base. If negative, add "-" as
the first character. Extend with leading "0" until the length is at
least len

this numeric value as an u8

create binary representation

create binary representation with given number of digits.

create decimal representation

create decimal representation with given number of digits.

Get the dynamic type of this instance. For value instances `x`, this is
equal to `type_of x`, but for `x` with a `ref` type `x.dynamic_type` gives
the actual runtime type, while `type_of x` results in the static
compile-time type.

There is no dynamic type of a type instance since this would result in an
endless hierachy of types. So for Type values, dynamic_type is redefined
to just return Type.type.

does this numeric value fit into an u8? This is redefined by children
of numeric that support `as_u8`.

greatest common divisor of this and b

note that this assumes zero to be divisible by any positive integer.

create hexadecimal representation

create hexadecimal representation with given number of digits.

basic operations: 'infix %' (division remainder)

test divisibility by other

bitwise operations

basic operations: 'infix *' (multiplication)

basic operations: 'infix **' (exponentiation)

basic operations: 'infix +' (addition)

basic operations: 'infix -' (subtraction)

defining an integer interval from this to other, both inclusive

special cases of interval a..b:

a < b: the interval from a to b, both inclusive
a == b: the interval containing only one element, a
a > b: an empty interval

basic operations: 'infix /' (division)

create a fraction

shift operations

create a fraction via unicode fraction slash \u2044 '⁄ '

is `this` contained in `Set` `s`?

This should usually be called using type inference as in

my_set := set_of ["A","B","C"]
say ("B" ∈ my_set)
say ("D" ∈ my_set)

is `this` not contained in `Set` `s`?

This should usually be called using type inference as in

my_set := set_of ["A","B","C"]
say ("B" ∉ my_set)
say ("D" ∉ my_set)

check if this type of integer is bounded

returns false unless redefined by a specific implementation of integer

name of this type, including type parameters, e.g. 'option (list i32)'.

create octal representation

create octal representation with given number of digits.

an infinite integer Sequence starting from this up to the maximum value
has_interval.this.max

an infinite integer Sequence starting from this up to the maximum value
has_interval.this.max

NYI: CLEANUP: Eventually remove `postfix ..` or `postfix ..∞` in favor of the
other one, for now this is here to show that `∞` is a legal symbol in an operator.

convenience prefix operator to create a string from a value.

This permits usage of `$` as a prefix operator in a similar way both
inside and outside of constant strings: $x and "$x" will produce the
same string.

basic operations: 'prefix +' (identity)

preconditions for basic operations: true if the operation's result is
representable and defined for the given values

default implementations all return `true` such that children have to
redefine these only for partial operations such as those resulting in
an overflow or that are undefined like a division by zero for most
types.

basic operations: 'prefix -' (negation)

overflow checking operations

saturating operations

bitwise NOT

bitwise NOT (Unicode alias)

sign function resulting in `-1`/`0`/`+1` depending on whether `numeric.this`
is less than, equal or larger than zero

absolute value using `|a|` built from a `prefix |` and `postfix |` as an operator
alias of `a.abs`

Due to the low precedence of `|`, this works also on expressions like `|a-b|`, even
with spaces `| a-b |`, `|a - b|`, `| a-b|` or `|a-b |`.

Nesting, however, does not work, e.g, `| - |a| |`, this requires parenthese `|(- |a|)|`.

NYI: CLEANUP: Due to #3081, we need `postfix |` as the first operation, should be
`prefix |` first

equality

the value corresponding to v in whatever integer implementation we have,
maximum in case of overflow

create hash code for this instance

This should satisfy the following condition:

(T.equality a b) : (T.hash_code a = T.hash_code b)

total order

identity element for 'infix *'

monoid of numeric with infix * operation. Will create product of all elements
it is applied to.

monoid of numeric with infix *^ operation. Will create product of all elements
it is applied to, stopping at max/min value in case of overflow.

monoid of numeric with infix + operation. Will create sum of all elements it
is applied to.

monoid of numeric with infix +^ operation. Will create sum of all elements it
is applied to, stopping at max/min value in case of overflow.

the constant '10' in whatever integer implementation we have, maximum in case of overflow

the constant '2' in whatever integer implementation we have, maximum in case of overflow

Get a type as a value.

This is a feature with the effect equivalent to Fuzion's `expr.type` call tail.
It is recommended to use `expr.type` and not `expr.type_value`.

`type_value` is here to show how this can be implemented and to illustrate the
difference to `dynamic_type`.

identity element for 'infix +'