update rust ast

tools/src/main.rs

@@ -4,8 +4,8 @@ use std::env;
 use std::fs;
 use std::process;
 use syn::{
-    spanned::Spanned, FnArg, Item, ItemEnum, ItemFn, ItemImpl, ItemMod, ItemStruct, ItemTrait,
-    ItemUse, Pat, Type, Visibility,
+    spanned::Spanned, Attribute, FnArg, Item, ItemEnum, ItemFn, ItemImpl, ItemMod, ItemStruct,
+    ItemTrait, Pat, Type, Visibility,
 };
 
 #[derive(Serialize)]
@@ -166,6 +166,7 @@ fn parse_function(item_fn: &ItemFn) -> Option<RustDecl> {
         methods: Vec::new(),
         return_type,
         parameters,
+        docstring: extract_docstring(&item_fn.attrs),
     })
 }
 
@@ -197,6 +198,7 @@ fn parse_struct(item_struct: &ItemStruct) -> Option<RustDecl> {
         methods: Vec::new(),
         return_type: None,
         parameters: Vec::new(),
+        docstring: extract_docstring(&item_fn.attrs),
     })
 }
 
@@ -228,6 +230,7 @@ fn parse_enum(item_enum: &ItemEnum) -> Option<RustDecl> {
         methods: Vec::new(),
         return_type: None,
         parameters: Vec::new(),
+        docstring: extract_docstring(&item_fn.attrs),
     })
 }
 
@@ -265,6 +268,7 @@ fn parse_trait(item_trait: &ItemTrait) -> Option<RustDecl> {
         methods,
         return_type: None,
         parameters: Vec::new(),
+        docstring: extract_docstring(&item_fn.attrs),
     })
 }
 
@@ -329,22 +333,21 @@ fn parse_impl(item_impl: &ItemImpl) -> Option<RustDecl> {
 /// Pull a concatenated doc‑string from a list of attributes.
 /// Handles both `///` comments (converted to `#[doc = "..."]` by syn)
 /// and explicit `#[doc = "..."]` attributes.
-fn extract_docstring(attrs: &[syn::Attribute]) -> Option<String> {
+fn extract_docstring(attrs: &[Attribute]) -> Option<String> {
     let mut docs = Vec::new();
 
     for attr in attrs {
-        if attr.path.is_ident("doc") {
+        // `path()` is the correct method; `path` is a field
+        if attr.path().is_ident("doc") {
             // #[doc = "…"]
             if let Ok(meta) = attr.parse_meta() {
                 if let syn::Meta::NameValue(nv) = meta {
-                    if let syn::Lit::Str(lit) = nv.lit {
+                    // The field is `value`, not `lit`
+                    if let syn::Lit::Str(lit) = nv.value {
                         docs.push(lit.value());
                     }
                 }
             }
-        } else if attr.path.is_ident("doc") {
-            // Just in case `#[doc]` appears without a value (unlikely but harmless)
-            continue;
         }
     }