From 5a1d8e50ae50663603eb2fd1d30a36dd782f8f88 Mon Sep 17 00:00:00 2001
From: Zuckjet <zuckjet@gmail.com>
Date: Sun, 13 Sep 2020 12:32:10 +0800
Subject: [PATCH] Fix the operand of a 'delete' operator must be optional error
 in typescript 4.0

---
 build/build.ts   | 2 +-
 build/index.d.ts | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/build/build.ts b/build/build.ts
index 15086e06..f0761756 100644
--- a/build/build.ts
+++ b/build/build.ts
@@ -97,7 +97,7 @@ function getTsxGrammar() {
 
 function getTsGrammar(getVariables: (tsGrammarVariables: MapLike<string>) => MapLike<string>) {
     const tsGrammarBeforeTransformation = readYaml(file(Language.TypeScript, Extension.YamlTmLanguage)) as TmGrammar;
-    return updateGrammarVariables(tsGrammarBeforeTransformation, getVariables(tsGrammarBeforeTransformation.variables));
+    return updateGrammarVariables(tsGrammarBeforeTransformation, getVariables(tsGrammarBeforeTransformation.variables as MapLike<string>));
 }
 
 function replacePatternVariables(pattern: string, variableReplacers: VariableReplacer[]) {
diff --git a/build/index.d.ts b/build/index.d.ts
index 4d66451b..6c0ca790 100644
--- a/build/index.d.ts
+++ b/build/index.d.ts
@@ -38,7 +38,7 @@ declare interface TmGrammar {
     scopeName: string;
     fileTypes: string[];
     uuid: string;
-    variables: MapLike<string>;
+    variables?: MapLike<string>;
     patterns?: AnyTmGrammarRule[];
     repository: MapLike<TmGrammarRepositaryRule>;
 }