feat(core): add batch methods to Suggest and update macro

Add `add_suggest()` and `add_suggest_with_description()` methods to
`Suggest` for ergonomic batch population of suggestion sets from
collections of strings.

Update the `suggest!` macro to use these new methods and accept
expressions beyond string literals for suggestion items.

3 files changed, 74 insertions, 12 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0d46f4d..4780d0f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -72,6 +72,13 @@ None
 
     _No behavioral change for downstream code — all public items are re-exported with the same names. The `__this_program_impl` module is `#[doc(hidden)]` and not part of the public API._
 
+3. **[`core:comp`]** Added `add_suggest()` and `add_suggest_with_description()` methods to `Suggest` for batch-adding suggestion items:
+
+    - **`add_suggest(&mut self, items: impl Into<Vec<String>>)`** — Wraps each item in `SuggestItem::Simple` and inserts it into the underlying `BTreeSet`.
+    - **`add_suggest_with_description(&mut self, items: impl Into<Vec<String>>, desc: impl Into<String>)`** — Wraps each item in `SuggestItem::WithDescription` using the provided description and inserts it into the set.
+
+    These methods enable ergonomic batch population of suggestion sets from collections of strings, complementing the existing `insert()` method.
+
 #### Features:
 
 1. **[`picker:value:paths`]** Added new path wrapper types to `arg_picker::value` for filesystem-aware argument parsing:
diff --git a/mingling_core/src/comp/suggest.rs b/mingling_core/src/comp/suggest.rs
index 88fa5fc..dda5026 100644
--- a/mingling_core/src/comp/suggest.rs
+++ b/mingling_core/src/comp/suggest.rs
@@ -56,6 +56,42 @@ impl Suggest {
             (suggest, _) => suggest,
         }
     }
+
+    /// Adds multiple simple suggestions (without descriptions) to the `Suggest` set.
+    ///
+    /// Each item produced by the iterator is wrapped in a [`SuggestItem::Simple`]
+    /// variant and inserted into the underlying `BTreeSet`.
+    ///
+    /// # Arguments
+    ///
+    /// * `items` — A collection of suggestion strings to add.
+    pub fn add_suggest(&mut self, items: impl Into<Vec<String>>) {
+        for item in items.into() {
+            self.insert(SuggestItem::Simple(item));
+        }
+    }
+
+    /// Adds multiple suggestions with a shared description to the `Suggest` set.
+    ///
+    /// Each item produced by the iterator is wrapped in a
+    /// [`SuggestItem::WithDescription`] variant using the provided description,
+    /// and inserted into the underlying `BTreeSet`.
+    ///
+    /// # Arguments
+    ///
+    /// * `items` — A collection of suggestion strings to add.
+    /// * `desc` — The description to attach to each suggestion. Must implement
+    ///   `Into<String>`.
+    pub fn add_suggest_with_description(
+        &mut self,
+        items: impl Into<Vec<String>>,
+        desc: impl Into<String>,
+    ) {
+        let desc_str = desc.into();
+        for item in items.into() {
+            self.insert(SuggestItem::WithDescription(item, desc_str.clone()));
+        }
+    }
 }
 
 impl<T> From<T> for Suggest
diff --git a/mingling_macros/src/func/suggest.rs b/mingling_macros/src/func/suggest.rs
index 85f1afe..6613a98 100644
--- a/mingling_macros/src/func/suggest.rs
+++ b/mingling_macros/src/func/suggest.rs
@@ -2,15 +2,15 @@ use proc_macro::TokenStream;
 use quote::quote;
 use syn::parse::{Parse, ParseStream};
 use syn::punctuated::Punctuated;
-use syn::{Expr, LitStr, Token, parse_macro_input};
+use syn::{Expr, Token, parse_macro_input};
 
 struct SuggestInput {
     items: Punctuated<SuggestItem, Token![,]>,
 }
 
 enum SuggestItem {
-    WithDesc(Box<(LitStr, Expr)>), // "-i" = "Insert something"
-    Simple(LitStr),                // "-I"
+    WithDesc(Box<(Expr, Expr)>), // "-i" = "Insert something"
+    Simple(Expr),                // "-I"
 }
 
 impl Parse for SuggestInput {
@@ -22,7 +22,7 @@ impl Parse for SuggestInput {
 
 impl Parse for SuggestItem {
     fn parse(input: ParseStream) -> syn::Result<Self> {
-        let key: LitStr = input.parse()?;
+        let key: Expr = input.parse()?;
 
         if input.peek(Token![:]) {
             let _colon: Token![:] = input.parse()?;
@@ -34,36 +34,55 @@ impl Parse for SuggestItem {
     }
 }
 
+/// 判断表达式是否是一个纯字符串字面量（仅由一对引号包裹）
+fn is_pure_lit_str(expr: &Expr) -> bool {
+    matches!(expr, Expr::Lit(lit) if matches!(lit.lit, syn::Lit::Str(_)))
+}
+
 #[cfg(feature = "comp")]
 pub(crate) fn suggest(input: TokenStream) -> TokenStream {
     let input = parse_macro_input!(input as SuggestInput);
 
     let mut items = Vec::new();
+    let mut simple_items = Vec::new();
 
     for item in input.items {
         match item {
             SuggestItem::WithDesc(boxed) => {
                 let (key, value) = *boxed;
-                items.push(quote! {
-                    ::mingling::SuggestItem::new_with_desc(#key.to_string(), #value.to_string())
-                });
+                if is_pure_lit_str(&key) {
+                    items.push(quote! {
+                        vec![#key .to_string()], #value
+                    });
+                } else {
+                    items.push(quote! {
+                        #key, #value
+                    });
+                }
             }
             SuggestItem::Simple(key) => {
-                items.push(quote! {
-                    ::mingling::SuggestItem::new(#key.to_string())
-                });
+                if is_pure_lit_str(&key) {
+                    simple_items.push(quote! {
+                        vec![#key .to_string()]
+                    });
+                } else {
+                    simple_items.push(quote! {
+                        #key
+                    });
+                }
             }
         }
     }
 
-    let expanded = if items.is_empty() {
+    let expanded = if items.is_empty() && simple_items.is_empty() {
         quote! {
             ::mingling::Suggest::new()
         }
     } else {
         quote! {{
             let mut suggest = ::mingling::Suggest::new();
-            #(suggest.insert(#items);)*
+            #(suggest.add_suggest_with_description(#items);)*
+            #(suggest.add_suggest(#simple_items);)*
             suggest
         }}
     };