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Allow Infinity and NaN to be used as an Enum property identifier

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This commit is contained in:
Fabian Cook
2016-09-08 01:46:10 +12:00
parent 4685646281
commit 088da9ea9d
9 changed files with 67 additions and 1 deletions
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6
src/compiler/checker.ts
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@@ -10033,6 +10033,10 @@ namespace ts {
return isTypeAny(type) || isTypeOfKind(type, kind);
}
function isInfinityOrNaNString(name: string) : boolean {
return name === 'Infinity' || name === 'NaN';
}
function isNumericLiteralName(name: string) {
// The intent of numeric names is that
// - they are names with text in a numeric form, and that
@@ -16848,7 +16852,7 @@ namespace ts {
}
else {
const text = getTextOfPropertyName(<PropertyName>member.name);
if (isNumericLiteralName(text)) {
if (isNumericLiteralName(text) && !isInfinityOrNaNString(text)) {
error(member.name, Diagnostics.An_enum_member_cannot_have_a_numeric_name);
}
}