From: Matt Corallo <git@bluematt.me>
Date: Sun, 31 Oct 2021 23:32:55 +0000 (+0000)
Subject: Check if types are understood before we map an impl block for them
X-Git-Tag: v0.0.103.0^2~9
X-Git-Url: http://git.bitcoin.ninja/index.cgi?p=ldk-c-bindings;a=commitdiff_plain;h=3a9500828833fa20d8d8c44eea4ed05342187fa9

Check if types are understood before we map an impl block for them
---

diff --git a/c-bindings-gen/src/main.rs b/c-bindings-gen/src/main.rs
index ea624e5..b88f37f 100644
--- a/c-bindings-gen/src/main.rs
+++ b/c-bindings-gen/src/main.rs
@@ -771,6 +771,11 @@ fn writeln_impl<W: std::io::Write>(w: &mut W, i: &syn::ItemImpl, types: &mut Typ
 		if p.qself.is_some() { unimplemented!(); }
 		if let Some(ident) = single_ident_generic_path_to_ident(&p.path) {
 			if let Some(resolved_path) = types.maybe_resolve_non_ignored_ident(&ident) {
+				if !types.understood_c_path(&p.path) {
+					eprintln!("Not implementing anything for impl {} as the type is not understood (probably C-not exported)", ident);
+					return;
+				}
+
 				let mut gen_types = GenericTypes::new(Some(resolved_path.clone()));
 				if !gen_types.learn_generics(&i.generics, types) {
 					eprintln!("Not implementing anything for impl {} due to not understood generics", ident);