gleamunison/dynamic_ffi
One declaration authority for the term <-> Dynamic casts.
On the BEAM a Dynamic is the term, so both directions compile to the
identity function in gleamunison_ffi. gleam_stdlib’s dynamic module
only ships per-type identities (dynamic.int, dynamic.string, …), so
the polymorphic pair has to be owned somewhere — here, once.
Before this module the same two externals were re-declared 18 times under
seven drifting names (cast/uncast/coerce/text_arg/as_result/
as_bit_array/unsafe_coerce), several of them pointing at to_dynamic
for what is really the from direction. One name per direction.
Values
pub fn from_dynamic(val: dynamic.Dynamic) -> aRead an untyped dynamic value back as a concrete type. The cast is unchecked: a wrong shape surfaces later, at the point of use, not here.
pub fn to_dynamic(val: a) -> dynamic.DynamicName an ordinary term as an untyped dynamic value.