traits.rs - mozsearch

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extern crate autocfg;

fn main() {

    // Normally, cargo will set `OUT_DIR` for build scripts.

    let ac = autocfg::AutoCfg::with_dir("target").unwrap();

    // since ancient times...

    ac.emit_has_trait("std::ops::Add");

    ac.emit_trait_cfg("std::ops::Add", "has_ops");

    // trait parameters have to be provided

    ac.emit_has_trait("std::borrow::Borrow<str>");

    ac.emit_trait_cfg("std::borrow::Borrow<str>", "has_borrow");

    // rustc 1.8.0

    ac.emit_has_trait("std::ops::AddAssign");

    ac.emit_trait_cfg("std::ops::AddAssign", "has_assign_ops");

    // rustc 1.12.0

    ac.emit_has_trait("std::iter::Sum");

    ac.emit_trait_cfg("std::iter::Sum", "has_sum");

    // rustc 1.28.0

    ac.emit_has_trait("std::alloc::GlobalAlloc");

    ac.emit_trait_cfg("std::alloc::GlobalAlloc", "has_global_alloc");