How can access be gained to semantic tokens in vscode extension development by using context key related to them?

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To gain access to semantic tokens in VSCode extension development using context key related to them, you can follow these steps:

1. Define a context key in your extension's package.json file to match the semantic token type that you want to access. For example, if you want to access all variables in a document, you can define a context key like this:

"contributes": {
  "menus": {
    "editor/context": [
      {
        "when": "variableScope",
        "command": "myExtension.doSomething"
      }
    ]
  },
  "contextMenus": [
    {
      "when": "editorTextFocus && variableScope",
      "command": "myExtension.doSomething"
    }
  ]
}

1. Use the vscode.languages.registerDocumentSemanticTokensProvider function to register a semantic tokens provider for your desired language. This will allow you to access the tokens in your extension code.

const provider = vscode.languages.registerDocumentSemanticTokensProvider(
    { language: 'myLanguage' },
    {
        provideDocumentSemanticTokens(document: vscode.TextDocument): vscode.ProviderResult<vscode.SemanticTokens> {
            // return semantic tokens for a document
        }
    }
);

1. Use the vscode.commands.executeCommand function to execute a command when the defined context key is matched. This will allow you to access the semantic tokens when the command is executed.

vscode.commands.executeCommand('setContext', 'variableScope', true);

1. In your extension's command handler, you can get the semantic tokens for the active editor by calling the vscode.languages.getSemanticTokens function.

vscode.commands.registerCommand('myExtension.doSomething', () => {
    const tokens = vscode.languages.getSemanticTokens(vscode.window.activeTextEditor.document);
    // do something with the tokens
});

By following these steps, you can gain access to semantic tokens in your VSCode extension development by using context keys related to them.