feat(parser): handle missing rparen error

Author: GreasySlug

crates/erg_parser/error.rs

@@ -175,6 +175,23 @@ impl LexError {
         ))
     }
 
+    pub fn parenthesize_error(errno: usize, loc: Location, got: &str) -> Self {
+        let msg = switch_lang!(
+            "japanese" => "不適切な閉じ括弧があります",
+            "simplified_chinese" => "存在不匹配的右括号",
+            "traditional_chinese" => "存在不匹配的右括號",
+            "english" => "unmatched closing parenthesis found",
+        );
+        let got = StyledStr::new(got, Some(ERR), Some(ATTR));
+        let hint = switch_lang!(
+            "japanese" => format!("この{}は対応する開き括弧がないため、削除するか開き括弧を追加してください", got),
+            "simplified_chinese" => format!("{}缺少对应的左括号，请删除或添加左括号", got),
+            "traditional_chinese" => format!("{}缺少對應的左括號，請刪除或添加左括號", got),
+            "english" => format!("{} has no matching opening parenthesis - either remove it or add an opening parenthesis", got),
+        );
+        Self::syntax_error(errno, loc, msg, Some(hint))
+    }
+
     pub fn expect_next_line_error(errno: usize, loc: Location, caused: &str) -> Self {
         Self::new(ErrorCore::new(
             vec![SubMessage::ambiguous_new(

crates/erg_parser/parse.rs

@@ -2050,6 +2050,13 @@ impl Parser {
                     debug_exit_info!(self);
                     return Err(());
                 }
+                Some(t) if t.is(RParen) => {
+                    let err = ParseError::parenthesize_error(line!() as usize, t.loc(), ")");
+                    self.errs.push(err);
+                    debug_exit_info!(self);
+                    return Err(());
+                }
+                
                 _ => {
                     if stack.len() <= 1 {
                         break;