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feat: add Dec.Float64() function #9382

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merged 9 commits into from
May 26, 2021
Merged

feat: add Dec.Float64() function #9382

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a8aabd6
feat: add Dec.Float64() function
freak12techno May 21, 2021
b6f636c
chore: add CHANGELOG.md release entry
freak12techno May 21, 2021
b3c84d8
chore: added MustFloat64(), return result with error on Float64()
freak12techno May 23, 2021
fdd99a0
chore: add godoc
freak12techno May 23, 2021
aa080ba
Update types/decimal.go
freak12techno May 25, 2021
fcce66f
Update types/decimal.go
freak12techno May 25, 2021
d120bb2
Merge branch 'master' into add-float64-to-int
freak12techno May 25, 2021
abd6514
chore: re-ordered changelog
freak12techno May 25, 2021
5da5c75
Merge branch 'master' into add-float64-to-int
amaury1093 May 26, 2021
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -41,6 +41,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
* [\#9235](https://github.com/cosmos/cosmos-sdk/pull/9235) CreateMembershipProof/CreateNonMembershipProof now returns an error
if input key is empty, or input data contains empty key.
* [\#9314](https://github.com/cosmos/cosmos-sdk/pull/9314) Update Rosetta SDK to upstream's latest release.
* [\#9382](https://github.com/cosmos/cosmos-sdk/pull/9382) feat: add Dec.Float64() function.
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### Features

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16 changes: 16 additions & 0 deletions types/decimal.go
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Expand Up @@ -474,6 +474,22 @@ func (d Dec) String() string {
return string(bzStr)
}

// Returns the float64 representation of a Dec.
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// Will return the error if the conversion failed.
func (d Dec) Float64() (float64, error) {
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return strconv.ParseFloat(d.String(), 64)
}

// Returns the float64 representation of a Dec.
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// Would panic if the conversion failed.
func (d Dec) MustFloat64() float64 {
if value, err := strconv.ParseFloat(d.String(), 64); err != nil {
panic(err)
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} else {
return value
}
}

// ____
// __| |__ "chop 'em
// ` \ round!"
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22 changes: 22 additions & 0 deletions types/decimal_test.go
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Expand Up @@ -100,6 +100,28 @@ func (s *decimalTestSuite) TestDecString() {
}
}

func (s *decimalTestSuite) TestDecFloat64() {
tests := []struct {
d sdk.Dec
want float64
}{
{sdk.NewDec(0), 0.000000000000000000},
{sdk.NewDec(1), 1.000000000000000000},
{sdk.NewDec(10), 10.000000000000000000},
{sdk.NewDec(12340), 12340.000000000000000000},
{sdk.NewDecWithPrec(12340, 4), 1.234000000000000000},
{sdk.NewDecWithPrec(12340, 5), 0.123400000000000000},
{sdk.NewDecWithPrec(12340, 8), 0.000123400000000000},
{sdk.NewDecWithPrec(1009009009009009009, 17), 10.090090090090090090},
}
for tcIndex, tc := range tests {
value, err := tc.d.Float64()
s.Require().Nil(err, "error getting Float64(), index: %v", tcIndex)
s.Require().Equal(tc.want, value, "bad Float64(), index: %v", tcIndex)
s.Require().Equal(tc.want, tc.d.MustFloat64(), "bad MustFloat64(), index: %v", tcIndex)
}
}

func (s *decimalTestSuite) TestEqualities() {
tests := []struct {
d1, d2 sdk.Dec
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