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Fix Issue 20282 - CustomFloat.dig fails at some values.

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This commit is contained in:
Bernhard Seckinger 2019-10-17 15:44:41 +02:00
parent 1ed26be565
commit 072095ebea
1 changed files with 5 additions and 6 deletions
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11
std/numeric.d
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@ -403,9 +403,8 @@ public:
/// Returns: number of decimal digits of precision
static @property size_t dig()
{
auto shiftcnt = precision - ((flags&Flags.storeNormalized) != 0);
immutable x = (shiftcnt == 64) ? 0 : 1uL << shiftcnt;
return cast(size_t) log10(x);
auto shiftcnt = precision - ((flags&Flags.storeNormalized) == 0);
return shiftcnt == 64 ? 19 : cast(size_t) log10(1uL << shiftcnt);
}
/// Returns: smallest increment to the value 1
@ -746,10 +745,10 @@ public:
{
static assert(CustomFloat!(1, 6).dig == 0);
static assert(CustomFloat!(9, 6).dig == 2);
// static assert(CustomFloat!(10, 5).dig == 3); // doesn't work yet due to bug 20282
// static assert(CustomFloat!(10, 6, CustomFloatFlags.none).dig == 2); // doesn't work yet due to bug 20282
static assert(CustomFloat!(10, 5).dig == 3);
static assert(CustomFloat!(10, 6, CustomFloatFlags.none).dig == 2);
static assert(CustomFloat!(11, 5, CustomFloatFlags.none).dig == 3);
// static assert(CustomFloat!(64, 7).dig == 19); // doesn't work yet due to bug 20282
static assert(CustomFloat!(64, 7).dig == 19);
}
// testing .mant_dig