rustc-ap-syntax 420.0.0

Automatically published version of the package `syntax` in the rust-lang/rust repository from commit 54479c624cc24bb852291d83e11cc19389dcb21b The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish
Documentation 
1
2
3
4
5

fn main() {
    println!("cargo:rerun-if-changed=build.rs");
    println!("cargo:rerun-if-env-changed=CFG_RELEASE_CHANNEL");
    println!("cargo:rerun-if-env-changed=CFG_DISABLE_UNSTABLE_FEATURES");
}