diff --git a/src/lib.rs b/src/lib.rs
index f373bf6..e365491 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -132,7 +132,6 @@
         unwrap("where clause", generics::parsing::where_clause, input)
     }
 
-    #[cfg(feature = "full")]
     pub fn parse_token_trees(input: &str) -> Result<Vec<TokenTree>, String> {
         unwrap("token trees", mac::parsing::token_trees, input)
     }
@@ -141,6 +140,10 @@
         unwrap("identifier", ident::parsing::ident, input)
     }
 
+    pub fn parse_ty_param_bound(input: &str) -> Result<TyParamBound, String> {
+        unwrap("type parameter bound", generics::parsing::ty_param_bound, input)
+    }
+
     // Deprecated.
     #[doc(hidden)]
     pub fn parse_macro_input(input: &str) -> Result<MacroInput, String> {
diff --git a/tests/test_generics.rs b/tests/test_generics.rs
index c0e21fb..3e2fd42 100644
--- a/tests/test_generics.rs
+++ b/tests/test_generics.rs
@@ -69,3 +69,30 @@
 
     assert_eq!(expected, tokens.to_string());
 }
+
+#[test]
+fn test_ty_param_bound() {
+    let tokens = quote!('a);
+    let expected = TyParamBound::Region(Lifetime::new("'a"));
+    assert_eq!(expected, parse_ty_param_bound(tokens.as_str()).unwrap());
+
+    let tokens = quote!(Debug);
+    let expected = TyParamBound::Trait(
+        PolyTraitRef {
+            bound_lifetimes: Vec::new(),
+            trait_ref: "Debug".into(),
+        },
+        TraitBoundModifier::None,
+    );
+    assert_eq!(expected, parse_ty_param_bound(tokens.as_str()).unwrap());
+
+    let tokens = quote!(?Sized);
+    let expected = TyParamBound::Trait(
+        PolyTraitRef {
+            bound_lifetimes: Vec::new(),
+            trait_ref: "Sized".into(),
+        },
+        TraitBoundModifier::Maybe,
+    );
+    assert_eq!(expected, parse_ty_param_bound(tokens.as_str()).unwrap());
+}