We have been a bit too strict on disallowing 'allow_cast' propagations. This is really only problematic for nested elements like Tuple's elements or App's args. However, for linked and unbound var it is probably okay, and it certainly is as well for function arguments.
it seems we can fix this by changing which side
gets subtracted by 1 depending on the op associativity.
BinOp::Or & BinOp::And are right associative while the
other bin ops are left associative.
closes#893
Co-authored-by: Kasey White <kwhitemsg@gmail.com>
Also slightly extended the check test 'framework' to allow registering side-dependency and using them from another module. This allows to check the interplay between opaque type from within and outside of their host module.
is_assignment was a bit confusing to me since we do actually categorize expect as 'assignment'. So this is more about whether this is a *let* assignment. Hence 'is_let'.
Discard pattern are _dangerous_ is used recklessly. The problem comes
from maintenance and when adding new fields. We usually don't get any
compiler warnings which may lead to missing spots and confusing
behaviors.
So I have, in some cases, inline discard to explicitly list all
fields. That's a bit more cumbersome to write but hopefully will catch
a few things for us in the future.
The main trick here was transforming Assignment
to contain `Vec<UntypedPattern, Option<Annotation>>`
in a field called patterns. This then meant that I
could remove the `pattern` and `annotation` field
from `Assignment`. The parser handles `=` and `<-`
just fine because in the future `=` with multi
patterns will mean some kind of optimization on tuples.
But, since we don't have that optimization yet, when
someone uses multi patterns with an `=` there will be an
error returned from the type checker right where `infer_seq`
looks for `backpassing`. From there the rest of the work
was in `Project::backpassing` where I only needed to rework
some things to work with a list of patterns instead of just one.
The 3rd kind of assignment kind (Bind) is gone and now reflected through a boolean parameter. Note that this parameter is completely erased by the type-checker so that the rest of the pipeline (i.e. code-generation) doesn't have to make any assumption. They simply can't see a backpassing let or expect.
This is more holistic and less awkward than having monadic bind working only with some pre-defined type. Backpassing work with _any_ function, and can be implemented relatively easily by rewriting the AST on-the-fly.
Also, it is far easier to explain than trying to explain what a monadic bind is, how its behavior differs from type to type and why it isn't generally available for any monadic type.
We'll piggyback on the tracing capabilities of the VM to provide labelling for prop tests. To ensure we do not interfere with normal traces, we only count traces that starts with a NUL byte as label. That convention is assumed to be known of the companion fuzz library that should then provide the labelling capabilities as a dedicated function.
Before this commit, we would always show the 'declared form' of type aliases, with their generic, non-instantiated parameters. This now tries to unify the annotation with the underlying inferred type to provide even better alias pretty printing.
Somehow, these have always been right-associative, when the natural thing to expect is left-associativity. It now matters when trying to crawl down binary tree to display them properly.
Using ByteArrays as vectors on-chain is a lot more efficient than relying on actul Data's list of values. From the Rust end, it doesn't change much as we were already manipulating vectors anyway.
Also, this commit makes `apply_term` automatically re-intern the
program since it isn't safe to apply any term onto a UPLC program. In
particular, terms that introduce new let-bindings (via lambdas) will
mess with the already generated DeBruijn indices.
The problem doesn't occur for pure constant terms like Data. So we
still have a safe and fast version 'apply_data' when needed.
This was a mess to say to the least. The mess started when we wanted
to make all definitions in codegen use immutable maps of references --
which was and still is a good idea. Yet, the population of the data
types and functions definitions was done somehow in a separate step,
in a rather ad-hoc manner.
This commit changes that to ensure the project's data_types and
functions are populated while type checking the AST such that we need
not to redo it after.
The code for registering the data type definitions and function
definitions was also duplicated in at least 3 places. It is now a
method of the TypedModule.
Note: this change isn't only just cosmetic, it's also necessary for
the commit that follows which aims at adding tests to the set of
available function definitions, thus allowing to make property tests
callable.
Those end-to-end tests are useful. Both for controlling the behavior of the shrinker, but also to double check the reification of Plutus Data back into untyped expressions.
I had to work-around a few things to get opaque type and private types play nice. Also found a weird bug due to how we apply parameters after unique debruijn indexes have been also applied. A work-around is to re-intern the program.
True corresponds to Constr=1 and False corresponds to Constr=0; their position in the vector shall reflect that. Note that while this would in principle impact codegen for any other type, it doesn't for bool since we likely never looked up this type definition since it is well-known. It does now as the 'reify' function relies on this. Whoopsie.
rvcas