the duration in nano seconds

For `duration`, this feature redefined from `Period` will just return an equal `duration`
like `duration.this`.

create a string representation of this duration. The string
representation is not accurate, it consists of at least two
and at most 4 decimal digits followed by a time unit string.

create a string representation of this duration using the given unit.

this duration in whole days, omitting fractional part

dynamic_apply -- apply `f.call` to `Any.this`'s dynamic type and value

This can be used to perform operation on values depending on their dynamic
type.

Here is an example that takes a `Sequence Any` that may contain boxed values
of types `i32` and `f64`. We can now write a feature `get_f64` that extracts
these values converted to `f64` and build a function `sum` that sums them up
as follows:


NYI: IMPROVEMENT: #5892: If this is fixed, we could write

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 hierarchy of types. So for Type values, dynamic_type is redefined
to just return Type.type.

this duration in whole hours, omitting fractional part

this duration multiplied by factor n

this duration and another one combined

this duration minus another duration

this duration divided by duration other, rounding down

is this period infinite, i.e., it never ends?

this duration in micro seconds, omitting fractional part

this duration in milli seconds, omitting fractional part

this duration in whole minutes, omitting fractional part

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.

this duration in whole seconds, omitting fractional part

this duration multiplied by factor f

create a string representation of this duration. The string
representation is not accurate, it consists of at least two
and at most 4 decimal digits followed by a time unit string.

this duration in whole weeks, omitting fractional part

this duration in whole Julian years, omitting fractional part

create duration of n years

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

string representation of this type to be used for debugging.

result has the form "Type of '<name>'", but this might change in the future

create duration of n days

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

There is no dynamic type of a type instance since this would result in an
endless hierarchy of types, so dynamic_type is redefined to just return
Type.type here.

equality implements the default equality relation for values of this type.

This relation must be

- reflexive (equality a a),
- symmetric (equality a b = equality b a), and
- transitive ((equality a b && equality b c) : equality a c).

result is true iff 'a' is considered to represent the same abstract value
as 'b'.

create duration of n hours

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

create hash code from a duration

create duration of n hours

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

Is this type assignable to a type parameter with constraint `T`?

The result of this is a compile-time constant that can be used to specialize
code for a particular type.


it is most useful in conjunction with preconditions or `if` statements as in


or

total order

the maximum duration

max value for a duration given in days

max value for a duration given in hours

max value for a duration given in micros

max value for a duration given in millis

max value for a duration given in minutes

max value for a duration given in nanos

max value for a duration given in seconds

max value for a duration given in weeks

max value for a duration given in years

create duration of n min

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

create duration of n min

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

create duration of n ms

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

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

create duration of n ns

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

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.

NYI: Redefinition allows the type feature to be distinguished from its normal counterpart, see #3913

create duration of n seconds

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

create duration of n seconds

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

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`.

create duration of n weeks

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

create duration of n years

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

the zero duration, representing a time span of zero

create duration of n µs

NYI: Turn this into a 'postfix' call, see https://fuzion-lang.dev/design/postfix_calls

equals -- feature that compares two values using the equality relation
defined in their type

hash of a value

infix = -- infix operation as short-hand for 'equals'

does this come strictly before other?

infix <= -- infix operation as short-hand for 'lteq'

three-way comparison between this and other.

result is < 0 if this < other
result is > 0 if this > other
result is = 0 if this = other

infix = -- infix operation as short-hand for 'equals'

does this come strictly after other?

does this come after other?

is `a` contained in `Set` `s`?

This should usually be called using type inference as in

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

This should usually be called using type inference as in

infix ≟ -- infix operation as short-hand for 'equals'

infix ≤ -- infix operation as short-hand for 'lteq'

does this come after other?

three-way comparison between this and other.

result is < 0 if this < other
result is > 0 if this > other
result is = 0 if this = other

does this come strictly before other?

does this come strictly after other?

lteq -- feature that compares two values using the lteq relation
defined in their type

maximum of two values

memoize `f`.
wraps f so that f will only be called once for every unique input.

The term "memoization" was coined by Donald Michie in 1968 and
is derived from the Latin word "memorandum" ("to be remembered"),
usually truncated as "memo" in American English, and thus carries
the meaning of "turning a function into something to be remembered".
https://en.wikipedia.org/wiki/Memoization

example:

minimum of two values