go - 如何在 delve mozilla rr(record-replay) 重播 session 期间显示decimal.Decimal的浮点值

Question

我们如何在delve session 中轻松查看decimal.Decimal值的浮点值。尤其是在 mozilla rr 录制的 dlv replay session 中。

(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,}

谢谢

Answer 1

我 fork 了 delve 工具并改进了 p 命令:

https://github.com/whunmr/delve/commit/14a12a076b3626b8a36046793508785239a42f55

演示:

(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