Avoid name collisions when Render trait is already in scope

Closes #97

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Change Log
 
+## [Unreleased]
+
+- [Fixed] "Multiple applicable items in scope" error when using `Render` trait
+  [#97](https://github.com/lfairy/maud/issues/97)
+
 ## [0.17.0] - 2017-08-04
 
 - [Added] Allow terminating void elements with semicolons (`;`)

maud/tests/misc.rs

@@ -67,3 +67,18 @@ fn render_impl() {
     assert_eq!(s1, "pinkie");
     assert_eq!(s2, "pinkie");
 }
+
+#[test]
+fn issue_97() {
+    use maud::Render;
+
+    struct Pinkie;
+    impl Render for Pinkie {
+        fn render(&self) -> maud::Markup {
+            let x = 42;
+            html! { (x) }
+        }
+    }
+
+    assert_eq!(html!((Pinkie)).into_string(), "42");
+}

maud_macros/src/render.rs

@@ -84,12 +84,12 @@ impl Renderer {
             extern crate maud;
             // Create a local trait alias so that autoref works
             trait Render: maud::Render {
-                fn render_to(&self, output: &mut String) {
+                fn __maud_render_to(&self, output: &mut String) {
                     maud::Render::render_to(self, output);
                 }
             }
             impl<T: maud::Render> Render for T {}
-            $expr.render_to(&mut $output);
+            $expr.__maud_render_to(&mut $output);
         }));
     }