feat(7481): Operator to ensure an expression is contextually typed by, and satisfies, some type (#46827)

* feat(7481): add explicit type compatibility check with 'satisfies' expression

* Add failing test for lack of intersectioned contextual type

* Implement the behavior

* Add test corresponding to the 'if'

* Add test based on defined scenarios

* remove isExpression in favor of using type casting

* move tests from compiler to conformance folder

* update baseline

* add missing contextFlags argument

* use asserted type

* accept baseline

Co-authored-by: Ryan Cavanaugh <ryanca@microsoft.com>
This commit is contained in:
Oleksandr T
2022-08-26 20:05:52 +03:00
committed by GitHub
parent 07157914eb
commit 164dddc48e
102 changed files with 3172 additions and 449 deletions

View File

@@ -2372,6 +2372,9 @@ namespace ts {
case SyntaxKind.AsExpression:
diagnostics.push(createDiagnosticForNode((node as AsExpression).type, Diagnostics.Type_assertion_expressions_can_only_be_used_in_TypeScript_files));
return "skip";
case SyntaxKind.SatisfiesExpression:
diagnostics.push(createDiagnosticForNode((node as SatisfiesExpression).type, Diagnostics.Type_satisfaction_expressions_can_only_be_used_in_TypeScript_files));
return "skip";
case SyntaxKind.TypeAssertionExpression:
Debug.fail(); // Won't parse these in a JS file anyway, as they are interpreted as JSX.
}