[Pre-RFC] integer and float literals for custom types

[kornel]

I would love that. Here are previous discussions:

Pre-RFC: Custom Literals via Traits

This is a formal collection of my counter proposal from https://internals.rust-lang.org/t/pre-rfc-custom-suffixes-for-integer-and-float-literals/. Summary This RFC proposes syntax sugar for custom literals, implemented as std::ops traits. A custom literal is a suffix added to a numeric, string, or character literal to produce a user-defined type. For example: Complex numbers: 1 + 2i Time literals: 42ms + 120ns Typechecked units: 12m / 55s Compile-time checks of simple embedded languges: "…

Pre-RFC: Custom suffixes for integer and float literals

This proposal originates from “time units” PR. Motivation To make creation of values with associated unit of measure more natural and ergonomic. Currently we have to write: let dt1: Duration = Duration::new(1, 200*1_000_000); let dt2: Duration = Duration::from_micros(10); let dt3: Duration = Duration::from_micros(10) + Duration::from_nanos(200); // Units are from simple_units crate let distance1: Meter = Meter(1.0); let distance2: Meter = Meter(5e-9); let accel1: MeterPerSecond2 = MeterPerSec…