On Monday, 16 May 2022 at 09:46:57 UTC, IGotD- wrote:
On Sunday, 15 May 2022 at 13:26:30 UTC, vit wrote:
Hello, I want read decimal type from sql db, do some
arithmetic operations inside D program and write it back to
DB. Result need to be close to result as if this operations
was performed in sql DB. Something like C# decimal.
Exists this kind of library ind D? (ideally `pure @safe @nogc
nothrow`).
This also something I wondered, it should be standard in the D
library. Implementing it can be done straight forward with
existing D language primitives, essentially a struct.
For those who don't know, decimal in C# is like a floating
point value but the exponent is a power of 10 (internally total
16 bytes). This means that for "simple" mathematics rational
decimal values remains rational decimals values and not some
rounded value that would happen if you would use normal
floating point values. The decimal type is essential for
financial calculations.
I think D can more or less copy the C# solution.
Here's the implementation if anyone needs it:
https://referencesource.microsoft.com/#mscorlib/system/decimal.cs,1b2858baf311cbf9
Should be fairly straightforward to implement.
