INNER CODE UNIT · Rust

is_blocklisted_fn

EmbarkStudios/rust-gpu · crates/rustc_codegen_spirv/src/lib.rs:135

fn is_blocklisted_fn<'tcx>(
    tcx: TyCtxt<'tcx>,
    sym: &symbols::Symbols,
    instance: Instance<'tcx>,
) -> bool {
    // TODO: These sometimes have a constant value of an enum variant with a hole
    if let InstanceDef::Item(def_id) = instance.def {
        if let Some(debug_trait_def_id) = tcx.get_diagnostic_item(sym::Debug) {
            // Helper for detecting `<_ as core::fmt::Debug>::fmt` (in impls).
            let is_debug_fmt_method = |def_id| match tcx.opt_associated_item(def_id) {
                Some(assoc) if assoc.ident(tcx).name == sym::fmt => match assoc.container {
                    ty::ImplContainer => {
                        let impl_def_id = assoc.container_id(tcx);
                        tcx.impl_trait_ref(impl_def_id)
                            .map(|tr| tr.skip_binder().def_id)
                            == Some(debug_trait_def_id)
                    }
                    ty::TraitContainer => false,

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