56 lines
1.5 KiB
Rust
56 lines
1.5 KiB
Rust
use rustc::hir::itemlikevisit::ItemLikeVisitor;
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use rustc::hir;
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use rustc::ty::TyCtxt;
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use rustc_target::spec::abi::Abi;
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use syntax::symbol::sym;
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pub fn collect(tcx: TyCtxt<'_>) -> Vec<String> {
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let mut collector = Collector {
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args: Vec::new(),
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};
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tcx.hir().krate().visit_all_item_likes(&mut collector);
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for attr in tcx.hir().krate().attrs.iter() {
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if attr.path == sym::link_args {
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if let Some(linkarg) = attr.value_str() {
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collector.add_link_args(&linkarg.as_str());
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}
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}
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}
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return collector.args;
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}
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struct Collector {
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args: Vec<String>,
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}
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impl<'tcx> ItemLikeVisitor<'tcx> for Collector {
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fn visit_item(&mut self, it: &'tcx hir::Item) {
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let fm = match it.kind {
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hir::ItemKind::ForeignMod(ref fm) => fm,
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_ => return,
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};
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if fm.abi == Abi::Rust ||
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fm.abi == Abi::RustIntrinsic ||
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fm.abi == Abi::PlatformIntrinsic {
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return
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}
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// First, add all of the custom #[link_args] attributes
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for m in it.attrs.iter().filter(|a| a.check_name(sym::link_args)) {
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if let Some(linkarg) = m.value_str() {
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self.add_link_args(&linkarg.as_str());
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}
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}
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}
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fn visit_trait_item(&mut self, _it: &'tcx hir::TraitItem) {}
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fn visit_impl_item(&mut self, _it: &'tcx hir::ImplItem) {}
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}
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impl Collector {
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fn add_link_args(&mut self, args: &str) {
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self.args.extend(args.split(' ').filter(|s| !s.is_empty()).map(|s| s.to_string()))
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}
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}
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