easytime 0.2.2

Providing wrapper types for safely performing panic-free checked arithmetic on instants and durations.
Documentation 
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#![warn(rust_2018_idioms, single_use_lifetimes)]

use autocfg::AutoCfg;

// The rustc-cfg strings below are *not* public API. Please let us know by
// opening a GitHub issue if your build environment requires some way to enable
// these cfgs other than by executing our build script.
fn main() {
    let cfg = match AutoCfg::new() {
        Ok(cfg) => cfg,
        Err(e) => {
            println!(
                "cargo:warning={}: unable to determine rustc version: {}",
                env!("CARGO_PKG_NAME"),
                e
            );
            return;
        }
    };

    if cfg.probe_rustc_version(1, 39) {
        println!("cargo:rustc-cfg=stable_1_39");
    }
    if cfg.probe_rustc_version(1, 53) {
        println!("cargo:rustc-cfg=stable_1_53");
    }
}