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Add missing type relationship for conditional types

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This commit is contained in:
Anders Hejlsberg 2018-03-25 11:29:58 -07:00
parent 9557e4ad96
commit 8750bb8949
1 changed files with 7 additions and 4 deletions
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11
src/compiler/checker.ts
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@ -10205,10 +10205,13 @@ namespace ts {
if (result = isRelatedTo(getTrueTypeFromConditionalType(<ConditionalType>source), getTrueTypeFromConditionalType(<ConditionalType>target), reportErrors)) {
result &= isRelatedTo(getFalseTypeFromConditionalType(<ConditionalType>source), getFalseTypeFromConditionalType(<ConditionalType>target), reportErrors);
}
if (result) {
errorInfo = saveErrorInfo;
return result;
}
}
else {
result = isRelatedTo(getDefaultConstraintOfConditionalType(<ConditionalType>source), getDefaultConstraintOfConditionalType(<ConditionalType>target), reportErrors);
}
if (result) {
errorInfo = saveErrorInfo;
return result;
}
}
else if (relation !== definitelyAssignableRelation) {