For private `define-values` in classes with multiple variables, don't
eagerly throw type errors in the synthesis step. Instead, wait
until the later checking step when the environment will be correctly
set up.
When the initial synthesis typecheck fails, yield type Any for
the environment. If the typecheck should really fail, this is ok. If
not, then the user can add a type annotation.
A better long-term strategy is to change the handling of environments
so that the type environment gets refined as definitions are checked.
This way all annotations that the user writes are factored into the
initial environment and unannotated variables will have their types
synthesized.
...that also involve contracts.
That code was previously not marked as lifted by the contract system, and
thus was not ignored by TR. But TR was not giving it a type, which made the
optimizer unhappy, now that it looks at the types of everything.
Previously, most of it was actually deterministic enumeration, which meant
repeating the same tests over and over again. We still want to run those,
if only to catch regressions, so now we run both enumeration and truly
random tests, separately.
This does mean that the set of tests being run for a given seed is not the
same as it used to, so old seeds won't give the same results as before.
Most unit forms are supported, including most of the "infer" forms that
infer imports/exports/linkages from the current context.
Notably, none of the structural linking forms for units are supported, and
`define-unit-binding` is also currently unsupported.
When identifiers provided by typed modules were used in
certain submodules of the form (module* n #f ...) or were
used by modules implemented in a language defined by TR,
the wrong redirection was used in the expansion.
The reason was because TR's identifier redirection decided
whether it was in a typed or untyped context at module visit
time, but that's too early in the cases above.
(because TR's #%module-begin may not have begun expanding yet)
The fix uses a rename-transformer that delays the decision
to use the typed or untyped identifier until expansion time.
Closes GH issue #163 and #181
Closes PR 15118
