fix formatting and merging if chains in attributes (#2697)

* fix formatting and merging if chains in attributes

* fix autoformat if attribute chains

* Fix IfAttributeValue ToTokens implementation

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

packages/rsx/src/ifmt.rs

@@ -20,6 +20,12 @@ pub struct IfmtInput {
     pub segments: Vec<Segment>,
 }
 
+impl Default for IfmtInput {
+    fn default() -> Self {
+        Self::new(Span::call_site())
+    }
+}
+
 impl IfmtInput {
     pub fn new(span: Span) -> Self {
         Self {
@@ -45,22 +51,6 @@ impl IfmtInput {
         self.segments.extend(other.segments);
     }
 
-    pub fn push_condition(&mut self, condition: Expr, contents: IfmtInput) {
-        let desugared = quote! {
-            {
-                let _cond = if #condition { #contents.to_string() } else { String::new() };
-                _cond
-            }
-        };
-
-        let parsed = syn::parse2::<Expr>(desugared).unwrap();
-
-        self.segments.push(Segment::Formatted(FormattedSegment {
-            format_args: String::new(),
-            segment: FormattedSegmentType::Expr(Box::new(parsed)),
-        }));
-    }
-
     pub fn push_expr(&mut self, expr: Expr) {
         self.segments.push(Segment::Formatted(FormattedSegment {
             format_args: String::new(),
@@ -481,18 +471,6 @@ mod tests {
         assert!(input.is_static());
     }
 
-    #[test]
-    fn pushing_conditional() {
-        let mut input = syn::parse2::<IfmtInput>(quote! { "hello " }).unwrap();
-
-        input.push_condition(
-            parse_quote! { true },
-            syn::parse2::<IfmtInput>(quote! { "world" }).unwrap(),
-        );
-        println!("{}", input.to_token_stream().pretty_unparse());
-        dbg!(input.segments);
-    }
-
     #[test]
     fn fmt_segments() {
         let left = syn::parse2::<IfmtInput>(quote! { "thing {abc}" }).unwrap();