display: support methods producing non-string output

dr-orlovsky · dr-orlovsky · commit 4016b9d31cf0 · 2023-02-04T13:01:49.000+01:00
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -3,7 +3,7 @@ members = [".", "syn"]
 
 [package]
 name = "amplify_derive"
-version = "4.0.0-alpha.3"
+version = "4.0.0-alpha.5"
 description = "Powerful derivation macros; part of the 'amplify' library"
 authors = [
     "Dr. Maxim Orlovsky <orlovsky@ubideco.org>",
diff --git a/src/display.rs b/src/display.rs
@@ -234,7 +234,7 @@ impl Technique {
         match self {
             Technique::FromTrait(fmt) => fmt.into_token_stream2(span),
             Technique::FromMethod(path) => quote_spanned! { span =>
-                f.write_str(& #path (self))
+                ::core::fmt::Display::fmt(&#path(self), f)
             },
             Technique::WithFormat(fmt, fmt_alt) => {
                 let format = if alt && fmt_alt.is_some() {
