Changes {@debug _ } to {@debug}

src/compile/nodes/DebugTag.ts

@@ -1,21 +1,34 @@
 import Node from './shared/Node';
 import Tag from './shared/Tag';
 import Block from '../dom/Block';
+import Expression from './shared/Expression';
 import deindent from '../../utils/deindent';
 
-export default class DebugTag extends Tag {
+export default class DebugTag extends Node {
+	expression: Expression;
+	
+	constructor(compiler, parent, scope, info) {
+		super(compiler, parent, scope, info);
+		if (info.expression !== null)
+			// Debug when expression nodes change		
+			this.expression = new Expression(compiler, parent, scope, info.expression);
+		else
+			// "Debug all"
+			this.expression = info.expression
+	}
+
 	build(
 		block: Block,
 		parentNode: string,
 		parentNodes: string,
 	) {
-		const { dependencies } = this.expression;
-
 		// Debug all
-		if (dependencies.has('_')) {
+		if (this.expression === null) {
 			block.builders.create.addLine('debugger;');
 			block.builders.update.addLine('debugger;');
 		} else {
+			const { dependencies } = this.expression;
+
 			const condition = [...dependencies].map(d => `changed.${d}`).join(' || ');
 
 			const identifiers = [...dependencies].join(', ');

src/parse/state/mustache.ts

@@ -314,7 +314,13 @@ export default function mustache(parser: Parser) {
 			expression,
 		});
 	} else if (parser.eat('@debug')) {
-		const expression = readExpression(parser);
+		let expression;
+
+		// Implies {@debug} which indicates "debug all"
+		if (/\s*}/.test(parser.template[parser.index]))
+			expression = null;
+		else
+			expression = readExpression(parser);
 	
 		parser.allowWhitespace();
 		parser.eat('}', true);

src/validate/html/index.ts

@@ -74,19 +74,6 @@ export default function validateHtml(validator: Validator, html: Node) {
 			});
 		}
 
-		else if (node.type === 'DebugTag') {
-			// Only allow the `_` expression if it's by itself
-			// i.e. {@debug _, name } is redundantredundant-debug-all
-			const names = node.expression.expressions.map(e => e.name);
-
-			if (names.length > 0 && names.includes('_')) {
-				validator.error(node, {
-					code: 'redundant-debug-all',
-					message: `Combining other expressions with '_' is redundant`
-				});
-			}
-		}
-
 		if (validator.options.dev && isEmptyBlock(node)) {
 			validator.warn(node, {
 				code: `empty-block`,

test/validator/samples/redundant-debug-all/errors.json

@@ -1,15 +0,0 @@
-[{
-	"message": "Combining other expressions with '_' is redundant",
-	"start": {
-		"line": 1,
-		"column": 0,
-		"character": 0
-	},
-	"end":{
-		"line": 1,
-		"column": 16,
-		"character": 16
-	},
-	"pos": 0,
-	"code": "redundant-debug-all"
-}]

test/validator/samples/redundant-debug-all/input.html

@@ -1,12 +0,0 @@
-{@debug _, name}
-<div>Hello {name}!</div>
-
-<script>
-  export default {
-    data() {
-      return {
-        name: 'World'
-      }
-    }
-  }
-</script>