fix named vararg

Author: CppCXY

crates/emmylua_code_analysis/src/db_index/type/humanize_type.rs

@@ -939,11 +939,17 @@ impl<'a> TypeHumanizer<'a> {
 
         w.write_char('(')?;
         let saved = self.level;
+        let is_vararg = signature.is_vararg;
+        let last_idx = signature.params.len();
         self.level = self.child_level();
         for (i, param) in signature.get_type_params().iter().enumerate() {
             if i > 0 {
                 w.write_str(", ")?;
             }
+            if i == last_idx - 1 && is_vararg {
+                w.write_str("...")?;
+            }
+
             w.write_str(&param.0)?;
             if let Some(ty) = &param.1 {
                 w.write_str(": ")?;

crates/emmylua_code_analysis/src/diagnostic/checker/check_param_count.rs

@@ -173,6 +173,10 @@ fn check_call_expr(
     }
     // Check for redundant parameters
     else {
+        if func.is_variadic() {
+            return Some(());
+        }
+
         let mut min_call_args_count = call_args_count;
         if last_arg_is_dots {
             min_call_args_count = min_call_args_count.saturating_sub(1);

crates/emmylua_ls/src/handlers/hover/function/mod.rs

@@ -351,12 +351,18 @@ fn hover_doc_function_type(
         func_name.to_string()
     };
 
+    let is_vararg = func.is_variadic();
+    let last_idx = func.get_params().len().saturating_sub(1);
+
     let params = func
         .get_params()
         .iter()
         .enumerate()
         .map(|(index, param)| {
-            let name = param.0.clone();
+            let mut name = param.0.clone();
+            if is_vararg && index == last_idx && name != "..." {
+                name = format!("...{}", name);
+            }
             if index == 0 && is_method && !func.is_colon_define() {
                 "".to_string()
             } else if let Some(ty) = &param.1 {