How can we easily see the float value of decimal.Decimal value in delve session.
especially in dlv replay session recorded by mozilla rr.
(dlv) args
underlyingPx = github.com/shopspring/decimal.Decimal {value: ("*math/big.Int")(0xc00101cca0), exp: 3}
(dlv) p underlyingPx
github.com/shopspring/decimal.Decimal {
value: *math/big.Int {
neg: false,
abs: math/big.nat len: 1, cap: 1, [8],},
exp: 3,}
Thanks
I forked the delve tool and refined the p command:
https://github.com/whunmr/delve/commit/14a12a076b3626b8a36046793508785239a42f55
demo:
(dlv) p im
github.com/shopspring/decimal.Decimal {
value: *math/big.Int {
neg: false,
abs: math/big.nat len: 2, cap: 7, [4670227136653295616,10618058790999],},
exp: -33,}
value: 0.19586861307716508 <---- this is the added output
According to source code of Decimal there is a method to receive this information:
// Float64 returns the nearest float64 value for d and a bool indicating
// whether f represents d exactly.
// For more details, see the documentation for big.Rat.Float64
func (d Decimal) Float64() (f float64, exact bool) {
return d.Rat().Float64()
}
In provided example it will be enough to just call this method:
(dlv) p underlyingPx.Float64()