Unify derive logic

Author: Jethro Beekman

src/codegen/impl_debug.rs

@@ -1,6 +1,5 @@
 use ir::comp::{BitfieldUnit, CompKind, Field, FieldData, FieldMethods};
 use ir::context::BindgenContext;
-use ir::derive::CanTriviallyDeriveDebug;
 use ir::item::{HasTypeParamInArray, IsOpaque, Item, ItemCanonicalName};
 use ir::ty::{RUST_DERIVE_IN_ARRAY_LIMIT, TypeKind};
 use proc_macro2;
@@ -236,7 +235,7 @@ impl<'a> ImplDebug<'a> for Item {
                 let inner_type = ctx.resolve_type(inner).canonical_type(ctx);
                 match *inner_type.kind() {
                     TypeKind::Function(ref sig)
-                        if !sig.can_trivially_derive_debug(ctx) => {
+                        if !sig.function_pointers_can_derive() => {
                             Some((format!("{}: FunctionPointer", name), vec![]))
                     }
                     _ => debug_print(name, quote! { #name_ident }),

src/codegen/mod.rs

@@ -1746,7 +1746,7 @@ impl CodeGenerator for CompInfo {
             needs_partialeq_impl =
                 ctx.options().derive_partialeq &&
                 ctx.options().impl_partialeq &&
-                ctx.lookup_can_derive_partialeq_or_partialord(item.id()) == CanDerive::ArrayTooLarge;
+                ctx.lookup_can_derive_partialeq_or_partialord(item.id()) == CanDerive::Manually;
         }
 
         if item.can_derive_eq(ctx) {