☰
new
mutate.new
Functions
creates a copy of the mutable field
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.
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.
read the current value of this mutable value.
If this is open, check that the mutate effect this was created with is still
installed in the current environment.
If this is open, check that the mutate effect this was created with is still
installed in the current environment.
name of this type, including type parameters, e.g. 'option (list i32)'.
is this element open, i.e., can it be mutated?
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 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.
update mutable field with new value
Check that the mutate effect this was created with is still
installed in the current environment.
Check that the mutate effect this was created with is still
installed in the current environment.
update mutable field using a function of the old value
read the mutable value that is now immutable after it was closed for mutation.
Type Features
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`.
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`.
'mutate' effect in the current environment