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use rustc::hir::itemlikevisit::ItemLikeVisitor;
use rustc::hir;
use rustc::ty::TyCtxt;
use rustc_target::spec::abi::Abi;
pub fn collect<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) -> Vec<String> {
let mut collector = Collector {
args: Vec::new(),
};
tcx.hir.krate().visit_all_item_likes(&mut collector);
for attr in tcx.hir.krate().attrs.iter() {
if attr.path == "link_args" {
if let Some(linkarg) = attr.value_str() {
collector.add_link_args(&linkarg.as_str());
}
}
}
return collector.args
}
struct Collector {
args: Vec<String>,
}
impl<'tcx> ItemLikeVisitor<'tcx> for Collector {
fn visit_item(&mut self, it: &'tcx hir::Item) {
let fm = match it.node {
hir::ItemForeignMod(ref fm) => fm,
_ => return,
};
if fm.abi == Abi::Rust ||
fm.abi == Abi::RustIntrinsic ||
fm.abi == Abi::PlatformIntrinsic {
return
}
for m in it.attrs.iter().filter(|a| a.check_name("link_args")) {
if let Some(linkarg) = m.value_str() {
self.add_link_args(&linkarg.as_str());
}
}
}
fn visit_trait_item(&mut self, _it: &'tcx hir::TraitItem) {}
fn visit_impl_item(&mut self, _it: &'tcx hir::ImplItem) {}
}
impl Collector {
fn add_link_args(&mut self, args: &str) {
self.args.extend(args.split(' ').filter(|s| !s.is_empty()).map(|s| s.to_string()))
}
}