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runtime

fuzion.runtime

fuzion.runtime -- unit type to group fuzion runtime system APIs

Value Constructors

check_fault -- effect that terminates a computation due to a failed
condition in a check statement
contract_fault -- effect that terminates a computation due to a failed
condition in a check statement
fault -- effect that terminates a computation due to a runtime fault
post_fault -- effect that terminates a computation due to a failed runtime post
condition check
pre_fault -- effect that terminates a computation due to a failed runtime pre
condition check

Functions

§
:
Any
 => 
String 
[Inherited from  Any]
create a String from this instance. Unless redefined, `a.as_string` will
create `"instance[T]"` where `T` is the dynamic type of `a`
check_fault with no argument returns check_fault.env, the currently installed
runtime check_fault handler.
cause a check fault with given msg argument, i.e., call check_fault.cause
msg, i.e., use the current check_fault effect to fail with the given message.
contract_fault with no argument returns contract_fault.env, the currently installed
runtime contract_fault handler.
§
:
Any
 => 
Type 
[Inherited from  Any]
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.
fault with no argument returns fault.env, the currently installed
runtime fault handler.
§
:
Any
 => 
String 
[Inherited from  Type]
name of this type, including type parameters, e.g. 'option (list i32)'.
post_fault with no argument returns post_fault.env, the currently installed
runtime post_fault handler.
cause a postcondition fault with given msg argument, i.e., call post_fault.cause
msg, i.e., use the current post_fault effect to fail with the given message.
pre_fault with no argument returns pre_fault.env, the currently installed
runtime pre_fault handler.
cause a precondition fault with given msg argument, i.e., call pre_fault.cause
msg, i.e., use the current pre_fault effect to fail with the given message.
§
:
Any
 => 
String 
[Inherited from  Any]
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.

Value Types

check_fault -- effect that terminates a computation due to a failed
condition in a check statement
contract_fault -- effect that terminates a computation due to a failed
condition in a check statement
fault -- effect that terminates a computation due to a runtime fault
post_fault -- effect that terminates a computation due to a failed runtime post
condition check
pre_fault -- effect that terminates a computation due to a failed runtime pre
condition check

Type Features

§
:
Any
 is
 
[Inherited from  Any]
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`.