This commit ensures that FunctionIsolation and EnforceABI do only
thing. This means that they no longer modify `root`.
Instead, we have a new pass, `invoke-isolated-functions` that needs to
be run after them and replaces the entry point of the functions with
invokes to the isolated functions, possibly with the appropriate
arguments.
We used to mark call to noreturn functions as killers, but this is not
correct.
Note that this is a temporary solution, we need to explicitly handle
such situations.
This commit:
* Drops `KeyTraits::toString`: if needed, use `getNameFromYAMLScalar`.
* Makes many methods in TupleTree.h return `nullptr` or `std::optional`
in order to gracefully handle failures.
* Provides `KeyTraits` specializations for integral types and tuple-like
composed by types providing `KeyTraits`.
* Introduces `CompositeScalar`, which enables tuple-like objects to be
YAML-serializable scalars by joining the YAML-serialization of its
members through a customziable character.
* Implements `PathMatcher`, a very simple "regular expression" mechanism
for paths on tuple trees.
* Introduce testing for the Model.
This commit extends the support for the FOR_EACH macro used in
INTROSPECTION_NS to allow serialization of structs with more than
5 entries. Now it supports up to 16 entries.
Alessandro Di Federico