toFixed: Permit a rounding mode option

tc39 · Jul 31, 2024 · ced972c · ced972c
1 parent 86b8439
commit ced972c
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/spec.emu b/spec.emu
@@ -1130,12 +1130,17 @@ location: https://github.com/tc39/proposal-decimal/
       1. Let _O_ be the *this* value.
       1. Perform ? RequireInternalSlot(_O_, [[Decimal128Data]]).
       1. Let _numDigits_ be *+0*<sub>𝔽</sub>.
+      1. Let _roundingMode_ be *undefined*.
       1. If _options_ is not *undefined*, then
         1. If _options_ is not an Object, throw a *TypeError* exception.
         1. Set _numDigits_ to ? Get(_options_, *"digits"*).
         1. If _numDigits_ is not a Number, throw a *TypeError* exception.
+        1. Set _roundingMode_ to ? Get(_options_, *"roundingMode"*).
       1. If _numDigits_ < 0, throw a *RangeError* exception.
       1. If _numDigits_ is not an integer, throw a *RangeError* exception.
+      1. If _roundingMode_ is *undefined*, set _roundingMode_ to *"halfEven"*.
+      1. Else if _roundingMode_ is not a String, throw a *TypeError* exception.
+      1. Else if _roundingMode_ is not a <emu-xref href="#dfn-decimal128-rounding-mode">Decimal128 rounding mode</emu-xref>, throw a *RangeError* exception.
       1. Let _s_ be Decimal128ToDecimalString(_O_, *false*).
       1. If _s_ is *"NaN"*, *"Infinity"*, or *"-Infinity"*, return _s_.
       1. Let _integerDigits_ be *""*.