* Remove superCallShouldBeFirst error
It seems redundant since TS gives an error on any use of `this` before
super, and non-`this` uses before `super` should be fine.
Fixes#37371
* Revert "Remove superCallShouldBeFirst error"
This reverts commit 3c09153c8a.
* error except for target:"esnext" && useDefineForClassFields
* Fix use-before-def with methods on esnext+useDefineForClassFields
It was incorrectly flagging methods as used before their definition, but
this is allowed under any emit.
* Add instance function test case
* Error on missing BigInt in ES2020 too.
Previously it was only on ESNext, but bigint ships in ES 2020.
There are no tests for this; passing `false` doesn't cause any tests to
fail at least.
* add tests
* Avoid circular reference in this-property assignments
To do this, don't check this-property assigments that have the
this-property of the lhs appearing somewhere on the rhs:
```js
class C {
m() {
this.x = 12
this.x = this.x + this.y
}
}
```
I tried suppressing the circularity error, but because we cache the
first type discovered for a property, this still results in an implicit
any for `x` in the previous example. It just doesn't have an error.
Fixes#35099
* Add test case + rename function
* Use isMatchingReference
This only applies in JS, where `@template` tags can apply to
initialisers of variable declarations:
```js
/**
* @template T
* @returns {(b: T) => T}
*/
const seq = a => b => b
```
Fixes#36201
* Fix serialisation of static class members in JS
Previously static class members would be treated the same way as expando
namespace assignments to a class:
```ts
class C {
static get x() { return 1 }
}
C.y = 12
```
This PR adds a syntactic check to the static/namespace filter that
treats symbols whose valueDeclaration.parent is a class as statics.
Fixes#37289
* fix messed-up indent
* Extract function
* Fix crash for private identifier in expando assignments
It does this by disallowing private identifiers from expando assignments
entirely. I haven't thought of a scenario where they make sense, but I
haven't thought about it exhaustively either.
Fixes#37356
* Update baselines
I think the new error is probably better. It's certainly different!
Previously, spreading an optional any gave a bogus error when the name
conflicted with earlier properties in the object literal. Now the code
checks any types for optionality before issuing the error.
Fixes#37740
* Accept change
* Accept the huge set of ever so slightly changed baselines
* Update return type logic to only reuse nodes if original nodes share scope with current node, like property types, only reuse nodes if symbols referened are acessible, reuse nodes for property signatures, too
* Only reuse nodes when a context is provided (otherwise identifier printback may fail)
* Only track symbol if symbol is found and no error is recorded
* Fix type parameter reuse lookup
* Forbid cjs module.exports references in retained nodes
* Adjust check for cjs export references to not include bad module type in output
* Add symbol to all identifiers we see in existing nodes for quickinfo
* Accept fourslash baseline updates
* Accept slightly updated baseline post-merge
* Do not copy original nodes for error types, replace empty type references with any
* Add the 'awaited' type operator
* Add script to manually add reviewers to a PR when GH 'Suggested Reviewers' breaks
* Fix lint error in review script
* Only defer generic awaited type for possible thenable
* Add variance-like behavior for awaited
* Switch awaited type params to 'unreliable' variance
* fix typo in inferTypes
* LKG without syntax in lib
* LKG with new syntax in lib
* Add 'strictAwaitedTypes' flag
* Treat strictAwaitedTypes as strict-mode flag
* Rename TAll, remove duplicate definition of 'race'
* Apply suggestions from code review
Co-Authored-By: ExE Boss <3889017+ExE-Boss@users.noreply.github.com>
* Fix inference priority
* Update comment to isGenericAwaitableType
* Add overloads for then/catch to Promise
* Add inference heuristic for T | PromiseLike<T> (for any PromiseLike)
* Remove strictAwaitedTypes flag
Co-authored-by: ExE Boss <3889017+ExE-Boss@users.noreply.github.com>
* Added @ts-expect-error to @ts-ignore directives
Similar to `// @ts-ignore`, but will itself cause a new error diagnostic if it does not cause an existing diagnostic to be ignored.
Technical summary:
1. The scanner will now keep track of `CommentDirective`s it comes across: both `@ts-expect-error` and `@ts-ignore`
2. During type checking, the program will turn those directives into a map keying them by line number
3. For each diagnostic, if it's preceded by a directive, that directive is marked as "used"
4. All `@ts-expect-error` directives not marked as used generate a new diagnostic error
* Renamed to getDiagnosticsWithPrecedingDirectives per suggestion
* Added JSDoc comment I thought I did already
Co-authored-by: Orta <orta.therox+github@gmail.com>
* More precise property-overwritten-by-spread errors
Trying to do this check in getSpreadType just doesn't have enough
information, so I moved it to checkObjectLiteral, which is a better
place for issuing errors anyway.
Unfortunately, the approach is kind of expensive in that it
1. creates a new map for each property and
2. iterates over all properties of the spread type, even if it's a
union.
I have some ideas to improve (1) that might work out. I'm not sure how
bad (2) is since we're going to iterate over all properties of all
constituents of a union.
Fixes#36779
* another test and rename
* Remove bogus @implements errors
Make the search for the actual host more comprehensive by reusing the
code that previously only searched for functions. I don't know what to
call this function now, since the old name wasn't accurate either.
* undo gratuitous name change
* Improve name and make calling more uniform
It's slightly less efficient but I think worthwhile for readability.
* Treat never-like intersections as never
* Accept new baselines
* Fix compiler issues revealed by increased intersection correctness
* Delete fourslash tests that are no longer applicable
* Include isNeverLikeIntersection check in getNormalizedType
* Erase never-like types in several more places
* Check that base types are not never-like
* Add comments
* Revert isNeverLikeType check in getIndexType (keyof shouldn't resolve member types)
* Introduce getReducedType for union and intersection types
* Don't reduce in getApparentType
* Avoid relationship check in resolveMappedTypeMembers
* Accept new baselines
* Don't call getReducedType in getIndexType
* Ensure reduced and unreduced forms of a type can compare identical
* Reduce types before converting them to string representation
* Accept new baselines
* Reduce intersections before obtaining keyof X
* Add tests
* Accept new baselines
* Fix comment in tests
* Don't infer from empty intersection types
* Add tests
* Accept new baselines
* Defer instantiation of mapped type property types
* Accept new baselines
* Include more precise type in diagnostic
* Accept new baselines
* Minor optimization
* Improve error message
* Optional properties in intersections are never discriminants
* Adding support for @implements.
* Fixed code review issues for @implements, added some more tests.
* Fixed declaration emit for @interface
* Improved getImplementsTypes to not cache the results since it is only used once.
* Removed unnecessary checks from getImplementsTypes
THe code to bind `@enum` and `@typedef` didn't handle the case that the
`@enum` was on a property assignment to an alias of module.exports.
Specifically, `x` needs to be correctly aliased to the file's symbol in
the example below:
```
var x = module.exports = {};
/** @enum {string} */
x.E = {
A: "A"
};
```
* Add test
* Fix superfluous error when destructuring from object that includes spread assignment
* Update baseline to include error case
* Remove redundant check
* add tests but not baselines or fixes
* Update original change
Still probably wrong; probably doesn't even compile beacuse I'm just
typing on my laptop.
* fix error code ok
* notes to self
* Error: property is specified more than once via spread
* make jsx tests stricter
* update semicolon error message
* use ?. because it is great
* use maybeTypeOfKind in new code
* restore jsx error
* add tests
* Handle when files get checked in different orders
* Fix interface extends clause
* Fix import= something type only from a module
* Revert apparently unnecessary addition
* Revert "Revert apparently unnecessary addition"
This reverts commit 7444b0b72e.
* Disallow `import = a.b.c` on anything with type-only imports
* Safety first
* Add test for TS Server single-file open
* Add big comment
* Extract error reporting function for import aliases
* Delete blank line
* Un-export, comment, and colocate some utils
* Combine 3 type-only marking function calls into one
* Add more export default tests
