[fix] aborting

README.md

@@ -13,14 +13,21 @@ A simple language server based VSCode Extension for the (Branflakes?) (BrainFuck
 
 ### Execution
 
-Use the command to execute the code. 
-Issue is, because BF is a **turing complete** language, there is no way to know if the program will terminate or not. Hence for now, the command may lead to infinite execution.
+Use the BF execute task to execute the code. 
+Because JS is single threaded+.
 If the program requires input, it will be requested as a prompt.
 
 TODO: Implement a timeout.
 
 ### Changelog
 
+#### 0.3.0
+
+- Added a task for execution
+  - Press Control C to halt it while its waiting for input
+  - Close task to abort execution
+
+
 #### 0.2.1
 
 - Change category

client/src/exec/AbortRequestor.ts

@@ -0,0 +1,11 @@
+
+export class AbortClassRequestor{
+    private abortRequest=false;
+
+    requestAbort(){
+    	this.abortRequest=true;
+    }
+    isAborted(){
+    	return this.abortRequest;
+    }    
+}

client/src/exec/BranFlakesExecutorVisitor.ts

@@ -5,11 +5,11 @@ import { DiagnosticSeverity } from 'vscode-languageclient';
 import { getTree } from '../BranFlakesParseRunner';
 import { RuleNode } from 'antlr4ts/tree/RuleNode';
 import type InputStrategy from '../input/InputStrategy';
+import { AbortClassRequestor } from './AbortRequestor';
 
 export class BranFlakesExecutorVisitor
 	extends AbstractParseTreeVisitor<Promise<void>>
-	implements bfVisitor<Promise<void>>
-{
+	implements bfVisitor<Promise<void>> {
 	/**
 	 *
 	 * @param input Input string
@@ -18,6 +18,7 @@ export class BranFlakesExecutorVisitor
 	constructor(
 		private inputStrategy: InputStrategy,
 		private logger: (val: string) => Thenable<void>,
+		private abortRequestor?: AbortClassRequestor,
 		private inputPtr: number = 0
 	) {
 		super();
@@ -37,7 +38,6 @@ export class BranFlakesExecutorVisitor
 	private outputStr: string = '';
 
 
-
 	defaultResult() {
 		return Promise.resolve();
 	}
@@ -52,7 +52,8 @@ export class BranFlakesExecutorVisitor
 		text: string,
 		fn: string,
 		inputStrategy: InputStrategy,
-    	logger: (str: string) => Thenable<void>
+		logger: (str: string) => Thenable<void>,
+		aborter?: AbortClassRequestor
 	) {
 		//get tree and issues
 		const { tree, issues } = getTree(text, fn);
@@ -64,7 +65,7 @@ export class BranFlakesExecutorVisitor
 			throw Error('Errors exist');
 		}
 		// make visitor
-    	const vis = new BranFlakesExecutorVisitor(inputStrategy, logger);
+		const vis = new BranFlakesExecutorVisitor(inputStrategy, logger, aborter);
 		//visit the tree
 		await vis.visit(tree);
 
@@ -109,7 +110,7 @@ export class BranFlakesExecutorVisitor
 	async visitInputStmt() {
 		//get char
 		const char = (await this.inputStrategy.getInput()) ?? 0;
-    	if(char===3) {throw Error('Halt input wait');}
+		if (char === 3) { throw Error('Halt input wait'); }
 		//increment the input pointer after this
 		this.inputPtr++;
 		this.setCell(this.ptr, char);
@@ -129,7 +130,11 @@ export class BranFlakesExecutorVisitor
 			result = this.aggregateResult(result, childResult);
 			await result;
 		}
-    	return Promise.resolve();
+		// break for any close requests
+		return new Promise((res, rej) => {
+
+			setTimeout(() => { if (this.abortRequestor?.isAborted()??false) {rej('aborted');} else {res(undefined);} }, 0);
+		});
 	}
 	// override for maintaining async
 	protected async aggregateResult(

client/src/task/CustomExecutionTerminal.ts

@@ -1,6 +1,7 @@
 import * as vscode from 'vscode';
 import * as path from 'path';
 import { BranFlakesExecutorVisitor } from '../exec/BranFlakesExecutorVisitor';
+import { AbortClassRequestor } from '../exec/AbortRequestor';
 
 interface BFRunTaskDefinition extends vscode.TaskDefinition {
 	file?: string;
@@ -63,7 +64,7 @@ class CustomBuildTaskTerminal implements vscode.Pseudoterminal {
 	private openDocument: vscode.TextDocument | undefined;
 	onDidWrite: vscode.Event<string> = this.writeEmitter.event;
 	onDidClose?: vscode.Event<number> = this.closeEmitter.event;
-
+	abortRequestor = new AbortClassRequestor();
 
 	handleInput(data: string): void {
 		// this.writeEmitter.fire(`Echo(${data.length})` + data);
@@ -106,6 +107,8 @@ class CustomBuildTaskTerminal implements vscode.Pseudoterminal {
 
 	close(): void {
 		// The terminal has been closed. Shutdown the build.
+		console.log('Forced close');
+		this.abortRequestor.requestAbort();
 	}
 
 	private async doExecution(): Promise<void> {
@@ -120,13 +123,11 @@ class CustomBuildTaskTerminal implements vscode.Pseudoterminal {
 						return new Promise((res, rej) => {
 							if (cus.inputQueue.length > 0) {
 								const char = cus.inputQueue.shift();
-								console.log('consumed input', char);
 								res(char);
 							} else {
 								const dispose: vscode.Disposable[] = [];
 								cus.readEmitter.event(e => {
 									const char = cus.inputQueue.shift();
-									console.log('consumed input async', char);
 									//clear the earliest disposable
 									dispose.shift()?.dispose();
 									res(char);
@@ -137,9 +138,8 @@ class CustomBuildTaskTerminal implements vscode.Pseudoterminal {
 					},
 				},
 				async (data) => {
-					// console.log('output', data);
 					this.writeEmitter.fire(replaceLFWithCRLF(data));
-				}
+				},this.abortRequestor
 			);
 			this.closeEmitter.fire(0);
 		} catch (e) {

package-lock.json

@@ -1,12 +1,12 @@
 {
 	"name": "bfc-server",
-	"version": "0.2.1",
+	"version": "0.3.0",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "bfc-server",
-			"version": "0.2.1",
+			"version": "0.3.0",
 			"hasInstallScript": true,
 			"license": "MIT",
 			"dependencies": {

package.json

@@ -5,7 +5,7 @@
 	"author": "Atreya Bain",
 	"license": "MIT",
 	"publisher": "atreyabain",
-	"version": "0.2.1",
+	"version": "0.3.0",
 	"icon": "assets/128.png",
 	"categories": ["Programming Languages","Linters"],
 	"keywords": [