Keep emit flags set on the original node on a namespace or enum node.
This prevents dropping flags like NoComments, which caused duplicated
comment emits.
Additionally, TypeScript would emit synthetic comments twice, once for
the variable declaration, once for the module statement. This explicitly
clears away synthetic comments on namespaces and enums if their
synthetic comments have already been emitted on the corresponding
variable statement.
Previously, TypeScript would only set the text range when transforming
import and export declarations, leading it to drop synthetic comments
and emit flags.
This commit sets the original node on the statements that contains the
generated `require()` call (or similar, depending on module system),
retaining emit flags and synthetic comments.
Variables that do not have a local variable created get transformed into
a single exports assignment expression. TypeScript previously just
created a new expression and set the text range to retain original
comments, but for synthetic comments, merging the emit nodes by setting
the original node is required.
* Explicitly typed prototype assignments:ctx sensitive
Follow up to #25619: Add the necessary code to type `prototype`
correctly in prototype assignments so that code like
`F.prototype = { ... }` properly makes the object literal context
sensitive.
* Fix lint
* Explicitly typed js assignments: context sensitive
Explicitly typed special assignments should be context sensitive if they
have an explicit type tag. Previously no special assignments were
context sensitive because they are declarations, and in the common,
untyped, case we inspect the right side of the assignment to get the
type of the left side, and inspect the right side of the assignment to
get the type of the left side, etc etc.
Note that some special assignments still return `any` from
checkExpression, so still don't get the right type.
Fixes#25571
* Change prototype property handling+update bselines
* Fix indentation in test
* Update baselines
* mapTextChangesToCodeEditsUsingScriptInfo: Handle tsconfig.json text change
* Can't use `program.getSourceFile()` to determine file existence when multiple projects exist
* Use direct union instead of discriminated union
* Get return type from `@type` tag
This only happens in the checker, where the type is easily accessible.
The syntax-based check in getEffectiveReturnTypeNode as a fast path, and
for other uses that don't want to make a call to getTypeFromTypeNode.
Fixes#25525
* Implement PR suggestions
* Error when type tag isn't callable
* Fix lint
