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Merge #3817

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3817: vscode: highlight syntax tree ro editor r=matklad a=Veetaha

Small textmate grammar declaration to make rust-analyzer syntax tree more easily inspectable:
Btw, if we change the file extension of our `ra_syntax/test_data/**` files to `.rast` they should be highlighted in vscode too.

The colors of the tokens are actually going to be color-theme dependent, or you can customize them via:
```jsonc
{
    "editor.tokenColorCustomizations": {
        "textMateRules": [ { "scope": "name", "settings": { /* */ } } ] 
    }
}
```
![image](https://user-images.githubusercontent.com/36276403/78204947-99f9d600-74a3-11ea-8315-cb1c87810c7c.png)

Related: #3682

Co-authored-by: veetaha <veetaha2@gmail.com>
This commit is contained in:
bors[bot] 2020-04-02 07:32:14 +00:00 • committed by GitHub
commit f0ba01cd43
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5
editors/code/src/commands/syntax_tree.ts
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@ -15,6 +15,9 @@ export function syntaxTree(ctx: Ctx): Cmd {
void new AstInspector(ctx);
ctx.pushCleanup(vscode.workspace.registerTextDocumentContentProvider(AST_FILE_SCHEME, tdcp));
ctx.pushCleanup(vscode.languages.setLanguageConfiguration("ra_syntax_tree", {
brackets: [["[", ")"]],
}));
return async () => {
const editor = vscode.window.activeTextEditor;
@ -36,7 +39,7 @@ export function syntaxTree(ctx: Ctx): Cmd {
}
class TextDocumentContentProvider implements vscode.TextDocumentContentProvider {
readonly uri = vscode.Uri.parse('rust-analyzer://syntaxtree');
readonly uri = vscode.Uri.parse('rust-analyzer://syntaxtree/tree.rast');
readonly eventEmitter = new vscode.EventEmitter<vscode.Uri>();