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LibJS: Replace dead code in ParseTimeZoneOffsetString with an assertion
This is an editorial change in the Temporal spec.
See: a29c40b
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1 changed files with 10 additions and 10 deletions
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@ -267,32 +267,32 @@ ThrowCompletionOr<double> parse_time_zone_offset_string(GlobalObject& global_obj
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if (!success)
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return vm.throw_completion<RangeError>(global_object, ErrorType::InvalidFormat, "TimeZone offset");
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// 4. If either hours or sign are undefined, throw a RangeError exception.
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// NOTE: Both of these checks are always false, due to the handling of Step 2
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// 4. Assert: sign is not undefined.
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// 5. Assert: hours is not undefined.
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double sign;
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// 5. If sign is the code unit 0x002D (HYPHEN-MINUS) or 0x2212 (MINUS SIGN), then
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// 6. If sign is the code unit 0x002D (HYPHEN-MINUS) or 0x2212 (MINUS SIGN), then
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if (sign_part.is_one_of("-", "\xE2\x88\x92")) {
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// a. Set sign to −1.
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sign = -1;
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}
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// 6. Else,
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// 7. Else,
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else {
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// a. Set sign to 1.
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sign = 1;
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}
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// 7. Set hours to ! ToIntegerOrInfinity(hours).
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// 8. Set hours to ! ToIntegerOrInfinity(hours).
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auto hours = *hours_part.to_uint<u8>();
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// 8. Set minutes to ! ToIntegerOrInfinity(minutes).
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// 9. Set minutes to ! ToIntegerOrInfinity(minutes).
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auto minutes = *minutes_part.value_or("0"sv).to_uint<u8>();
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// 9. Set seconds to ! ToIntegerOrInfinity(seconds).
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// 10. Set seconds to ! ToIntegerOrInfinity(seconds).
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auto seconds = *seconds_part.value_or("0"sv).to_uint<u8>();
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i32 nanoseconds;
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// 10. If fraction is not undefined, then
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// 11. If fraction is not undefined, then
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if (fraction_part.has_value()) {
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// a. Set fraction to the string-concatenation of the previous value of fraction and the string "000000000".
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auto fraction = String::formatted("{}000000000", *fraction_part);
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@ -300,12 +300,12 @@ ThrowCompletionOr<double> parse_time_zone_offset_string(GlobalObject& global_obj
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// c. Set nanoseconds to ! ToIntegerOrInfinity(nanoseconds).
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nanoseconds = *fraction.substring(0, 9).to_int<i32>();
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}
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// 11. Else,
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// 12. Else,
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else {
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// a. Let nanoseconds be 0.
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nanoseconds = 0;
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}
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// 12. Return sign × (((hours × 60 + minutes) × 60 + seconds) × 10^9 + nanoseconds).
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// 13. Return sign × (((hours × 60 + minutes) × 60 + seconds) × 10^9 + nanoseconds).
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// NOTE: Decimal point in 10^9 is important, otherwise it's all integers and the result overflows!
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return sign * (((hours * 60 + minutes) * 60 + seconds) * 1000000000.0 + nanoseconds);
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}
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