[Feature] Macros to parse Ether and other units from string to U256

[cakevm]

Component

primitives

Describe the feature you would like

Often you have fixed values that could already be parsed during compile time. Currently I am initializing those values using lazy_static. My proposal would be to have macros to parse ether, wei, etc. from a string to U256.

Currently you will write:

let val: U256 = parse_units("0.01", "ether").unwrap().get_absolute();

Proposal:

let val: U256 = ether!("0.01");

If the parsing fails it will throw an error during compile time.

Additional context

No response

[makcandrov]

if you still need it I open sourced my implementation of these macros: alloy-unit-macros

[DaniPopes]

In the future we will be able to make more and more of the primitives const fn as more standard library methods and traits do, which will include the utils functions.

For now, you can use the uint! macro or the crate linked above

[DaniPopes]

Reviewed this again, currently still not possible as it would require a lot more const fns in ruint, which are blocked by const traits.