fix: correctly import scoped slots (closes #4311) (#4318)

leptos_macro/src/view/mod.rs

@@ -25,9 +25,8 @@ use std::{
 use syn::{
     punctuated::Pair::{End, Punctuated},
     spanned::Spanned,
-    Expr,
-    Expr::Tuple,
-    ExprArray, ExprLit, ExprRange, Lit, LitStr, RangeLimits, Stmt,
+    Expr::{self, Tuple},
+    ExprArray, ExprLit, ExprPath, ExprRange, Lit, LitStr, RangeLimits, Stmt,
 };
 
 #[derive(Clone, Copy, PartialEq, Eq)]
@@ -1871,6 +1870,28 @@ pub(crate) fn ident_from_tag_name(tag_name: &NodeName) -> Ident {
     }
 }
 
+pub(crate) fn full_path_from_tag_name(tag_name: &NodeName) -> Option<ExprPath> {
+    match tag_name {
+        NodeName::Path(path) => Some(path.clone()),
+        NodeName::Block(_) => {
+            let span = tag_name.span();
+            proc_macro_error2::emit_error!(
+                span,
+                "blocks not allowed in tag-name position"
+            );
+            None
+        }
+        _ => {
+            let span = tag_name.span();
+            proc_macro_error2::emit_error!(
+                span,
+                "punctuated names not allowed in slots"
+            );
+            None
+        }
+    }
+}
+
 pub(crate) fn directive_call_from_attribute_node(
     attr: &KeyedAttribute,
     directive_name: &str,

leptos_macro/src/view/slot_helper.rs

@@ -1,6 +1,6 @@
 use super::{
     component_builder::maybe_optimised_component_children,
-    convert_to_snake_case, ident_from_tag_name,
+    convert_to_snake_case, full_path_from_tag_name,
 };
 use crate::view::{fragment_to_tokens, utils::filter_prefixed_attrs, TagType};
 use proc_macro2::{Ident, TokenStream, TokenTree};
@@ -24,7 +24,7 @@ pub(crate) fn slot_to_tokens(
         node.name().to_string()
     });
 
-    let component_name = ident_from_tag_name(node.name());
+    let component_path = full_path_from_tag_name(node.name());
 
     let Some(parent_slots) = parent_slots else {
         proc_macro_error2::emit_error!(
@@ -190,7 +190,7 @@ pub(crate) fn slot_to_tokens(
 
     let slot = quote_spanned! {node.span()=>
         {
-            let slot = #component_name::builder()
+            let slot = #component_path::builder()
                 #(#props)*
                 #(#slots)*
                 #children