dir

reference to the writing operations that could take place

make -- effect providing make directory

read -- effect providing reading operations in directories

create a String from this instance. Unless redefined, `a.as_string` will
create `"instance[T]"` where `T` is the dynamic type of `a`

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.

make dir with the currently installed dir.make-effect.

if none is installed the default handler will be used to
install the effect and perform the operation.

short hand to get the currently
installed open effect
from the environment.
see `use` on how to use this.

short hand to get the currently
installed open effect
for type T from the environment.
see `use` on how to use this.

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.

short-hand for accessing read effect in current environment

short hand for use when
it is not necessary to distinguish between opens

usage example:

this opens a directory and installs the (open T) effect to be used
in `code()`.

type parameter T is used to distinguish between several open
directories.

usage example:

reference to the writing operations that could take place

reference to the reading operations that could take place

make -- effect providing make directory

effect for manipulating open directories
T is used to distinguish several open directories

unit type used internally by open- and use-
short hands which can be used when one does not need
to distinguish between several open directories.

read -- effect providing reading operations in directories

string representation of this type to be used for debugging.

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

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.

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.

is_of_integer_type(n T : numeric) => T : integer
say (is_of_integer_type 1234) # true
say (is_of_integer_type 3.14) # false

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

pair(a,b T) is

=>

or

val(n T) is

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

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`.