This fills the corresponding entries in the cast table with a Dead-Code
type so that when the contract-generation pass calls the contract-def
thunk, it finds that in the table.
* call compute-constraints instead of sc->constraints in get-max-contract-kind
* test cast on an intersection type involving Rec
* remove memory limit on sandboxed-unsafe-ops test
Adds intersection types as a better way to handle the the case
when restrict cannot structurally intersect two types (e.g. when
you learn within a polymorphic function a variable x of type A
is also an Integer, but we dont know how A relates to Integer).
This allows for non-lossy refinements of type info while typechecking.
This allows the types generated by the struct form, as well as #:struct
clauses of require/typed, to be specified explicitly using a #:type-name
option. This allows the name of a struct and the type it is assigned to
be different.
Closes#261
Guard opaque predicates with an (-> Any Any) contract. This uses the
contract generation infrastructure to avoid wrapping struct predicates.
Also, relax `any-wrap/c` (the contract used for `Any` in positive
position) to allow opaque structures. This also requires an enumeration
of all the other kinds of values that TR understands, so that they are
not confused with opaque structures.
Joint work with @bennn.
Closes#202.
Closes#203.
Closes#241.
See also commit 5cd5f77 “Don't allow promises created with `delay/name` as `(Promise T)`.”.
The contracts in `typed-racket-lib/typed-racket/static-contracts/combinators/structural.rkt` should be just a single identifier, not a lambda expression, because `typed-racket-lib/typed-racket/private/type-contract.rkt` relies on that, and passes the contract name to free-identifier=?, which won't work on a lambda.
* Add `normalise-inputs` to special function env.
* Treat eta-expansion specially. Now
`(lambda (x ...) (f x ...))`
will typecheck like `f` but with a type restricted to
the size of `x ...`.
Currently, this special case only works for non-polymorphic
functions.
New strategy for compiling the (-> Any Boolean) type to a contract.
When possible, uses `struct-predicate-procedure?` instead of
wrapping in `(-> any-wrap/c boolean?)`.
Makes exceptions for untyped chaperones/impersonators over struct predicates;
those are always wrapped with `(-> any-wrap/c boolean?)`.
This change also affects (require/typed ... [#:struct ...]), but not #:opaque
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
Moves `get-alternate` since its only user is the require-contract
module. In addition, it appears that one of the cases in the
conditional in its body is unnecessary. This likely means that
the extra machinery for typed-renamers are not needed at all.
Also adds a test for `require/typed` of a typed module
I had forgotten to adjust the define-struct macro to work
like the struct macro for the #:prefab keyword, which made
TR think prefabs were ordinary structs.
Closes GH issue #188
