fix paren and bracket semantic token

Author: CppCXY

crates/emmylua_ls/src/handlers/semantic_token/build_semantic_tokens.rs

@@ -2,6 +2,7 @@ use super::{
     SEMANTIC_TOKEN_MODIFIERS, SEMANTIC_TOKEN_TYPES, semantic_token_builder::SemanticBuilder,
 };
 use crate::handlers::semantic_token::function_string_highlight::fun_string_highlight;
+use crate::handlers::semantic_token::semantic_token_builder::CustomSemanticTokenType;
 use crate::util::parse_desc;
 use crate::{context::ClientId, handlers::semantic_token::language_injector::inject_language};
 use emmylua_code_analysis::{
@@ -116,15 +117,26 @@ fn build_tokens_semantic_token(
         | LuaTokenKind::TkAssign => {
             builder.push(token, SemanticTokenType::OPERATOR);
         }
-        // 冒号不标记为运算符，让VS Code使用默认的分隔符高亮
-        LuaTokenKind::TkColon
-        | LuaTokenKind::TkLeftBrace
-        | LuaTokenKind::TkRightBrace
-        | LuaTokenKind::TkLeftBracket
+        LuaTokenKind::TkLeftBrace | LuaTokenKind::TkRightBrace => {
+            builder.push(token, SemanticTokenType::OPERATOR);
+        }
+        LuaTokenKind::TkColon => {
+            if let Some(parent) = token.parent()
+                && parent.kind() != LuaSyntaxKind::IndexExpr.into()
+            {
+                builder.push(token, SemanticTokenType::OPERATOR);
+            }
+        }
+        // delimiter
+        LuaTokenKind::TkLeftBracket
         | LuaTokenKind::TkRightBracket
         | LuaTokenKind::TkLeftParen
         | LuaTokenKind::TkRightParen => {
-            builder.push(token, SemanticTokenType::OPERATOR);
+            if client_id.is_neovim() {
+                builder.push(token, CustomSemanticTokenType::DELIMITER);
+            } else {
+                builder.push(token, SemanticTokenType::OPERATOR);
+            }
         }
         LuaTokenKind::TkTrue | LuaTokenKind::TkFalse | LuaTokenKind::TkNil => {
             builder.push_with_modifier(

crates/emmylua_ls/src/handlers/semantic_token/semantic_token_builder.rs

@@ -7,6 +7,12 @@ use std::{
     vec::Vec,
 };
 
+pub struct CustomSemanticTokenType;
+impl CustomSemanticTokenType {
+    // neovim supports custom semantic token types, we add a custom type for delimiter
+    pub const DELIMITER: SemanticTokenType = SemanticTokenType::new("delimiter");
+}
+
 pub const SEMANTIC_TOKEN_TYPES: &[SemanticTokenType] = &[
     SemanticTokenType::NAMESPACE,
     SemanticTokenType::TYPE,
@@ -31,6 +37,8 @@ pub const SEMANTIC_TOKEN_TYPES: &[SemanticTokenType] = &[
     SemanticTokenType::REGEXP,
     SemanticTokenType::OPERATOR,
     SemanticTokenType::DECORATOR,
+    // Custom types
+    CustomSemanticTokenType::DELIMITER,
 ];
 
 pub const SEMANTIC_TOKEN_MODIFIERS: &[SemanticTokenModifier] = &[

crates/emmylua_ls/src/handlers/test/semantic_token_test.rs

@@ -79,13 +79,6 @@ mod tests {
                     token_type: SemanticTokenType::VARIABLE,
                     token_modifier: HashSet::from([SemanticTokenModifier::READONLY]),
                 },
-                VirtualSemanticToken {
-                    line: 4,
-                    start: 28,
-                    length: 1,
-                    token_type: SemanticTokenType::OPERATOR,
-                    token_modifier: HashSet::new(),
-                },
                 VirtualSemanticToken {
                     line: 4,
                     start: 29,
@@ -149,13 +142,6 @@ mod tests {
                     token_type: SemanticTokenType::OPERATOR,
                     token_modifier: HashSet::from([SemanticTokenModifier::DOCUMENTATION]),
                 },
-                VirtualSemanticToken {
-                    line: 4,
-                    start: 50,
-                    length: 1,
-                    token_type: SemanticTokenType::OPERATOR,
-                    token_modifier: HashSet::new(),
-                },
                 VirtualSemanticToken {
                     line: 4,
                     start: 51,