.. rst-class:: mini-api
- :mini:`meth :WeakMapT()`
- TBD
- :mini:`fun assign(Var: any, Value: any): any`
- Functional equivalent of :mini:`Var := Value`.
- :mini:`fun call(Fn: any, Arg₁: any, ..., Argₙ: any): any`
- Returns :mini:`Fn(Arg₁, ..., Argₙ)`.
- :mini:`fun cas(Var: any, Old: any, New: any): any`
If the value of :mini:`Var` is identically equal to :mini:`Old`, then sets :mini:`Var` to :mini:`New` and returns :mini:`New`. Otherwise leaves :mini:`Var` unchanged and returns :mini:`nil`.
var X := 10 cas(X, 10, 11) :> 11 X :> 11 cas(X, 20, 21) :> nil X :> 11
- :mini:`fun copy(Value: any, Fn?: function): any`
- Returns a copy of :mini:`Value` using a new :mini:`copy` instance which applies :mini:`Fn(Copy, Value)` to each value. If omitted, :mini:`Fn` defaults to :mini:`:copy`.
- :mini:`fun deref(Value: any): any`
- Returns the dereferenced value of :mini:`Value`.
- :mini:`fun exchange(Var₁: any, ..., Varₙ: any)`
- Assigns :mini:`Varᵢ := Varᵢ₊₁` for each :mini:`1 <= i < n` and :mini:`Varₙ := Var₁`.
- :mini:`fun findall(Value: any, Filter?: boolean|type): list`
- Returns a list of all unique values referenced by :mini:`Value` (including :mini:`Value`).
- :mini:`fun isconstant(Value: any): any | nil`
Returns :mini:`some` if it is a constant (i.e. directly immutable and not referencing any mutable values), otherwise returns :mini:`nil`.
isconstant(1) :> 1 isconstant(1.5) :> 1.5 isconstant("Hello") :> "Hello" isconstant(true) :> true isconstant([1, 2, 3]) :> nil isconstant((1, 2, 3)) :> (1, 2, 3) isconstant((1, [2], 3)) :> nil- :mini:`fun replace(Var₁: any, ..., Varₙ: any, Value: any)`
- Assigns :mini:`Varᵢ := Varᵢ₊₁` for each :mini:`1 <= i < n` and :mini:`Varₙ := Value`. Returns the old value of :mini:`Var₁`.
- :mini:`fun visit(Value: any, Fn: function): any`
- Returns :mini:`Fn(V, Value)` where :mini:`V` is a newly created :mini:`visitor`.
- :mini:`type visitor < function`
Used to apply a transformation recursively to values.
- :mini:`fun (V: visitor)(Value: any, Result: any): any`
- Adds the pair :mini:`(Value, Result)` to :mini:`V`'s cache and returns :mini:`Result`.
- :mini:`fun (V: visitor)(Value: any): any`
- Visits :mini:`Value` with :mini:`V` returning the result.
- :mini:`meth (Visitor: visitor):const(Value: any): any`
- Default visitor implementation, just returns :mini:`Value`.
- :mini:`meth (Visitor: visitor):copy(Value: any): any`
- Default visitor implementation, just returns :mini:`Value`.
- :mini:`meth (Visitor: visitor):visit(Value: any): any`
- Default visitor implementation, just returns :mini:`nil`.
- :mini:`type weakmap`
- TBD
- :mini:`meth (Arg₁: weakmap):insert(Arg₂: string)`
- TBD
- :mini:`type weakmaptoken`
- TBD
- :mini:`meth (Arg₁: string::buffer):append(Arg₂: weakmaptoken)`
- TBD