feat: rust-analyzer.interpretFunction

related #256

README.md

@@ -189,6 +189,7 @@ You can use these commands by `:CocCommand XYZ`.
 | rust-analyzer.cancelFlycheck | Cancel running flychecks |
 | rust-analyzer.clearFlycheck | Clear flycheck diagnostics |
 | rust-analyzer.rebuildProcMacros | Rebuild proc macros and build scripts |
+| rust-analyzer.interpretFunction | Interpret Function |
 
 ## License
 

package.json

@@ -1300,6 +1300,11 @@
         "title": "Rebuild proc macros and build scripts",
         "category": "rust-analyzer"
       },
+      {
+        "command": "rust-analyzer.interpretFunction",
+        "title": "Interpret Function",
+        "category": "rust-analyzer"
+      },
       {
         "command": "rust-analyzer.explainError",
         "title": "Explain the currently hovered diagnostic",

src/commands.ts

@@ -722,6 +722,27 @@ export function viewMir(ctx: Ctx): Cmd {
   return viewXir(ctx, 'MIR');
 }
 
+export function interpretFunction(ctx: Ctx): Cmd {
+  return async () => {
+    const { document, position } = await workspace.getCurrentState();
+    if (!isRustDocument(document)) return;
+
+    const param: TextDocumentPositionParams = {
+      textDocument: { uri: document.uri },
+      position,
+    };
+    const ret = await ctx.client.sendRequest(ra.interpretFunction, param);
+    if (!ret) return;
+    const nvim = workspace.nvim;
+    nvim.pauseNotification();
+    nvim.command(`edit +setl\\ buftype=nofile [interpretFunction]`, true);
+    nvim.command('setl nobuflisted bufhidden=wipe', true);
+    nvim.call('append', [0, ret.split('\n')], true);
+    nvim.command(`exe 1`, true);
+    await nvim.resumeNotification(true);
+  };
+}
+
 export function viewFileText(ctx: Ctx): Cmd {
   return async () => {
     const { document } = await workspace.getCurrentState();

src/index.ts

@@ -74,6 +74,7 @@ export async function activate(context: ExtensionContext): Promise<void> {
   ctx.registerCommand('clearFlycheck', cmds.clearFlycheck);
   ctx.registerCommand('analyzerStatus', cmds.analyzerStatus);
   ctx.registerCommand('viewCrateGraph', cmds.viewCrateGraph);
+  ctx.registerCommand('interpretFunction', cmds.interpretFunction);
   ctx.registerCommand('rebuildProcMacros', cmds.rebuildProcMacros);
   ctx.registerCommand('shuffleCrateGraph', cmds.shuffleCrateGraph);
   ctx.registerCommand('viewFullCrateGraph', cmds.viewFullCrateGraph);