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Add ad-hoc test for string literal type casts.

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This commit is contained in:
Daniel Rosenwasser
2020-02-26 17:07:28 -08:00
parent d07761fe39
commit 80fc6dc7e1
1 changed files with 3 additions and 0 deletions
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3
src/compiler/checker.ts
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@@ -26107,6 +26107,9 @@ namespace ts {
checkTypeComparableTo(exprType, targetType, errNode,
Diagnostics.Conversion_of_type_0_to_type_1_may_be_a_mistake_because_neither_type_sufficiently_overlaps_with_the_other_If_this_was_intentional_convert_the_expression_to_unknown_first);
}
else if (targetType.flags & TypeFlags.StringLiteral && isStringLiteral(expression) && expression.text !== (targetType as StringLiteralType).value) {
error(errNode, Diagnostics.Conversion_of_type_0_to_type_1_may_be_a_mistake_because_neither_type_sufficiently_overlaps_with_the_other_If_this_was_intentional_convert_the_expression_to_unknown_first, expression.text, typeToString(targetType));
}
}
return targetType;
}