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5.3 KiB
5.3 KiB
Propagating type edits
We introduce a type Foo
with a function dependent fooToInt
.
use .builtin
unique type Foo = Foo
fooToInt : Foo -> Int
fooToInt _ = +42
I found and typechecked these definitions in scratch.u. If you
do an `add` or `update`, here's how your codebase would
change:
⍟ These new definitions are ok to `add`:
unique type Foo
fooToInt : Foo -> Int
And then we add it.
☝️ The namespace .subpath is empty.
.subpath> add
⍟ I've added these definitions:
unique type Foo
fooToInt : Foo -> Int
.subpath> find.verbose
1. -- #qae64o6am81hoadf7eabd909gojboi5iu3g9deip79ro18f11bbhir2vg51grg4m72kr5ikdovi6aupttet0nsqil7f0df9nqr10hqg
unique type Foo
2. -- #qae64o6am81hoadf7eabd909gojboi5iu3g9deip79ro18f11bbhir2vg51grg4m72kr5ikdovi6aupttet0nsqil7f0df9nqr10hqg#0
Foo.Foo : Foo
3. -- #hvtmbg1bd8of81n2os4ginnnen13njh47294uandlohooq0ej971u6tl5cdsfq237lec1tc007oajc4dee1fmnflqi6ogom3ecemu5g
fooToInt : Foo -> Int
.subpath> view fooToInt
fooToInt : Foo -> Int
fooToInt _ = +42
Then if we change the type Foo
...
unique type Foo = Foo | Bar
I found and typechecked these definitions in scratch.u. If you
do an `add` or `update`, here's how your codebase would
change:
⍟ These names already exist. You can `update` them to your
new definition:
unique type Foo
and update the codebase to use the new type Foo
...
.subpath> update
⍟ I've updated these names to your new definition:
unique type Foo
... it should automatically propagate the type to fooToInt
.
.subpath> view fooToInt
fooToInt : Foo -> Int
fooToInt _ = +42
Preserving user type variables
We make a term that has a dependency on another term and also a non-redundant user-provided type signature.
use .builtin
someTerm : Optional foo -> Optional foo
someTerm x = x
otherTerm : Optional baz -> Optional baz
otherTerm y = someTerm y
I found and typechecked these definitions in scratch.u. If you
do an `add` or `update`, here's how your codebase would
change:
⍟ These new definitions are ok to `add`:
otherTerm : Optional baz -> Optional baz
someTerm : Optional foo -> Optional foo
Add that to the codebase:
☝️ The namespace .subpath.preserve is empty.
.subpath.preserve> add
⍟ I've added these definitions:
otherTerm : Optional baz -> Optional baz
someTerm : Optional foo -> Optional foo
Let's now edit the dependency:
use .builtin
someTerm : Optional x -> Optional x
someTerm _ = None
I found and typechecked these definitions in scratch.u. If you
do an `add` or `update`, here's how your codebase would
change:
⍟ These names already exist. You can `update` them to your
new definition:
someTerm : Optional x -> Optional x
Update...
.subpath.preserve> update
⍟ I've updated these names to your new definition:
someTerm : Optional x -> Optional x
Now the type of someTerm
should be Optional x -> Optional x
and the
type of otherTerm
should remain the same.
.subpath.preserve> view someTerm
someTerm : Optional x -> Optional x
someTerm _ = None
.subpath.preserve> view otherTerm
otherTerm : Optional baz -> Optional baz
otherTerm y = someTerm y
Propagation only applies to the local branch
Cleaning up a bit...
.> delete.namespace subpath
Removed definitions:
1. unique type Foo
2. Foo.Bar : #16d2id848g
3. Foo.Foo : #16d2id848g
4. fooToInt : #16d2id848g -> Int
5. preserve.otherTerm : Optional baz -> Optional baz
6. preserve.someTerm : Optional x -> Optional x
7. patch patch
8. patch preserve.patch
Tip: You can use `undo` or `reflog` to undo this change.
Now, we make two terms, where one depends on the other.
use .builtin
someTerm : Optional foo -> Optional foo
someTerm x = x
otherTerm : Optional baz -> Optional baz
otherTerm y = someTerm y
I found and typechecked these definitions in scratch.u. If you
do an `add` or `update`, here's how your codebase would
change:
⍟ These new definitions are ok to `add`:
otherTerm : Optional baz -> Optional baz
someTerm : Optional foo -> Optional foo
We'll make two copies of this namespace.
☝️ The namespace .subpath.one is empty.
.subpath.one> add
⍟ I've added these definitions:
otherTerm : Optional baz -> Optional baz
someTerm : Optional foo -> Optional foo
.subpath> fork one two
Done.
Now let's edit one of the terms...
use .builtin
someTerm : Optional x -> Optional x
someTerm _ = None
I found and typechecked these definitions in scratch.u. If you
do an `add` or `update`, here's how your codebase would
change:
⍟ These new definitions are ok to `add`:
someTerm : Optional x -> Optional x
... in one of the namespaces...
.subpath.one> update
⍟ I've updated these names to your new definition:
someTerm : Optional x -> Optional x
The other namespace should be left alone.
.subpath.two> view someTerm
someTerm : Optional foo -> Optional foo
someTerm x = x