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#![doc(html_root_url = "https://docs.rs/pkg-version-impl/0.0.0")]
#![warn(missing_debug_implementations, rust_2018_idioms)]
extern crate proc_macro;
use proc_macro::TokenStream;
use proc_macro_hack::proc_macro_hack;
use std::env;
type VersionNum = u64;
#[proc_macro_hack]
pub fn pkg_version_major(input: TokenStream) -> TokenStream {
if !input.is_empty() {
panic!("unexpected arguments for `pkg_version_major!` macro (expected no arguments)");
}
let version = env::var("CARGO_PKG_VERSION_MAJOR")
.unwrap()
.parse::<VersionNum>()
.unwrap();
version.to_string().parse().unwrap()
}
#[proc_macro_hack]
pub fn pkg_version_minor(input: TokenStream) -> TokenStream {
if !input.is_empty() {
panic!("unexpected arguments for `pkg_version_minor!` macro (expected no arguments)");
}
let version = env::var("CARGO_PKG_VERSION_MINOR")
.unwrap()
.parse::<VersionNum>()
.unwrap();
version.to_string().parse().unwrap()
}
#[proc_macro_hack]
pub fn pkg_version_patch(input: TokenStream) -> TokenStream {
if !input.is_empty() {
panic!("unexpected arguments for `pkg_version_patch!` macro (expected no arguments)");
}
let version = env::var("CARGO_PKG_VERSION_PATCH")
.unwrap()
.parse::<VersionNum>()
.unwrap();
version.to_string().parse().unwrap()
}