☰
try
eff.fallible.type.try
Functions
create a String from this instance. Unless redefined, `a.as_string` will
create `"instance[T]"` where `T` is the dynamic type of `a`
create `"instance[T]"` where `T` is the dynamic type of `a`
define code to execute in case of fault and run code_try.
define code to execute in case of fault and run code_try.
NYI: BUG: #3159 This is a variant of `catch` that uses inline code instead of `handle`. Using this
variant currently causes errors in the back end (`AbstractMethodError` for JVM backend, `unhandled
dynamic target` for C backend), need to analyse and fix this.
NYI: BUG: #3159 This is a variant of `catch` that uses inline code instead of `handle`. Using this
variant currently causes errors in the back end (`AbstractMethodError` for JVM backend, `unhandled
dynamic target` for C backend), need to analyse and fix this.
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.
name of this type, including type parameters, e.g. 'option (list i32)'.
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.
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`.
try is a type feature that can be called on any child of `fallible`
to run the code given as an argument and handle an error using the
`Unary` provided to `catch`.
This enables Java-like try-catch syntax as follows
res := FALLIBLE_TYPE.try ()->
or even
res := FALLIBLE_TYPE.try code || (s->handle fialure `s`)
Note that the code is not executed unless `.catch` or `infix ||` is applied
to the result of the call to `try`.