Add support for metal shading language

[bartwalczak]

Adds another format that can clang-format can handle.

[tiye]

wish I could see this earlier, took me several hours to realize why it failed. too me and my friend quite some time to figure out the problem.

diff --git a/package.json b/package.json
index 3dc71a8..bae7ad3 100644
--- a/package.json
+++ b/package.json
@@ -34,6 +34,7 @@
     "onLanguage:objective-c",
     "onLanguage:objective-cpp",
     "onLanguage:java",
+    "onLanguage:metal",
     "onLanguage:javascript",
     "onLanguage:typescript",
     "onLanguage:proto",
@@ -100,6 +101,11 @@
           "default": true,
           "description": "enable formatting for C (requires reloading Visual Studio Code)"
         },
+        "clang-format.language.metal.enable": {
+          "type": "boolean",
+          "default": true,
+          "description": "enable formatting for Metal (requires reloading Visual Studio Code)"
+        },
         "clang-format.language.c.style": {
           "type": "string",
           "default": "",
diff --git a/src/clangMode.ts b/src/clangMode.ts
index 68ca603..8864bf9 100644
--- a/src/clangMode.ts
+++ b/src/clangMode.ts
@@ -16,6 +16,7 @@ for (let l of [
   "java",
   "javascript",
   "json",
+  "metal",
   "typescript",
   "proto",
   "proto3",
diff --git a/src/extension.ts b/src/extension.ts
index 71d19c6..578bccd 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -188,7 +188,7 @@ export class ClangDocumentFormattingEditProvider
     let ret = vscode.workspace
       .getConfiguration("clang-format")
       .get<string>(`language.${this.getLanguage(document)}.style`);
-    if (ret.trim()) {
+    if (ret && ret.trim()) {
       return ret.trim();
     }
 
@@ -206,7 +206,7 @@ export class ClangDocumentFormattingEditProvider
     let strConf = vscode.workspace
       .getConfiguration("clang-format")
       .get<string>(`language.${this.getLanguage(document)}.fallbackStyle`);
-    if (strConf.trim()) {
+    if (strConf && strConf.trim()) {
       return strConf;
     }

[bartwalczak]

@tiye Thanks. I'm not sure if there's something I should do now?

[tiye]

I have no idea, this repo seems to be archived. Just wish some fixes like this one could be merged.