Support printing lifetime generics on an impl-Trait block

[ldk-c-bindings] / c-bindings-gen / src / blocks.rs

diff --git a/c-bindings-gen/src/blocks.rs b/c-bindings-gen/src/blocks.rs
index e48a98a5c5a14787f489096eabd8d283267d33ec..57135789b71079f97961f1aa3e020acfcf64f4bf 100644 (file)
--- a/c-bindings-gen/src/blocks.rs
+++ b/c-bindings-gen/src/blocks.rs
@@ -751,4 +751,20 @@ pub fn maybe_write_generics<W: std::io::Write>(w: &mut W, generics: &syn::Generi
        }
 }
 
-
+pub fn maybe_write_lifetime_generics<W: std::io::Write>(w: &mut W, generics: &syn::Generics, types: &TypeResolver) {
+       let mut gen_types = GenericTypes::new(None);
+       assert!(gen_types.learn_generics(generics, types));
+       if generics.params.iter().any(|param| if let syn::GenericParam::Lifetime(_) = param { true } else { false }) {
+               write!(w, "<").unwrap();
+               for (idx, generic) in generics.params.iter().enumerate() {
+                       match generic {
+                               syn::GenericParam::Type(_) => {},
+                               syn::GenericParam::Lifetime(lt) => {
+                                       write!(w, "{}'{}", if idx != 0 { ", " } else { "" }, lt.lifetime.ident).unwrap();
+                               },
+                               _ => unimplemented!(),
+                       }
+               }
+               write!(w, ">").unwrap();
+       }
+}