factor generateBlock out as a generator helper function

compiler/generate/index.js

@@ -52,6 +52,28 @@ export default function generate ( parsed, source, options, names ) {
 			return name;
 		},
 
+		generateBlock ( node, name ) {
+			generator.push({
+				name,
+				target: 'target',
+				localElementDepth: 0,
+
+				initStatements: [],
+				mountStatements: [],
+				updateStatements: [],
+				detachStatements: [],
+				teardownStatements: [],
+
+				getUniqueName: generator.getUniqueNameMaker()
+			});
+			// walk the children here
+			node.children.forEach( generator.visit );
+			generator.addRenderer( generator.current );
+			generator.pop();
+			// unset the children, to avoid them being visited again
+			node.children = [];
+		},
+
 		addRenderer ( fragment ) {
 			if ( fragment.autofocus ) {
 				fragment.initStatements.push( `${fragment.autofocus}.focus();` );

compiler/generate/visitors/Component.js

@@ -30,31 +30,12 @@ export default {
 			`target: ${!isToplevel ? generator.current.target: 'null'}`,
 			'root: component.root || component'
 		];
-		// Component has children
+
+		// Component has children, put them in a separate {{yield}} block
 		if ( hasChildren ) {
 			const yieldName = generator.current.getUniqueName( `render${name}YieldFragment` );
 
-			// {{YIELD STUFF}}
-			generator.push({
-				name: yieldName,
-				target: 'target',
-				localElementDepth: 0,
-
-				initStatements: [],
-				mountStatements: [],
-				updateStatements: [],
-				detachStatements: [],
-				teardownStatements: [],
-
-				getUniqueName: generator.getUniqueNameMaker()
-			});
-
-			node.children.forEach( generator.visit );
-			generator.addRenderer( generator.current );
-			generator.pop();
-
-			// Don't render children twice
-			node.children = [];
+			generator.generateBlock( node, yieldName );
 
 			generator.current.initStatements.push(`var ${name}_yieldFragment = ${yieldName}( root, component );`);
 			generator.current.updateStatements.push(`${name}_yieldFragment.update ( changed, root );`);

compiler/generate/visitors/EachBlock.js

@@ -101,22 +101,7 @@ export default {
 		}
 
 		if ( node.else ) {
-			generator.push({
-				name: renderElse,
-				target: 'target',
-				localElementDepth: 0,
-
-				initStatements: [],
-				mountStatements: [],
-				updateStatements: [],
-				detachStatements: [],
-				teardownStatements: [],
-
-				getUniqueName: generator.getUniqueNameMaker()
-			});
-			node.else.children.forEach( generator.visit );
-			generator.addRenderer( generator.current );
-			generator.pop();
+			generator.generateBlock( node.else, renderElse );
 		}
 
 		const indexNames = Object.assign( {}, generator.current.indexNames );

compiler/generate/visitors/IfBlock.js

@@ -1,28 +1,5 @@
 import deindent from '../utils/deindent.js';
 
-// collect all the conditions and blocks in the if/elseif/else chain
-function generateBlock ( generator, node, name ) {
-	// walk the children here
-	generator.push({
-		name,
-		target: 'target',
-		localElementDepth: 0,
-
-		initStatements: [],
-		mountStatements: [],
-		updateStatements: [],
-		detachStatements: [],
-		teardownStatements: [],
-
-		getUniqueName: generator.getUniqueNameMaker()
-	});
-	node.children.forEach( generator.visit );
-	generator.addRenderer( generator.current );
-	generator.pop();
-	// unset the children, to avoid them being visited again
-	node.children = [];
-}
-
 function getConditionsAndBlocks ( generator, node, _name, i = 0 ) {
 	generator.addSourcemapLocations( node.expression );
 	const name = `${_name}_${i}`;
@@ -31,7 +8,7 @@ function getConditionsAndBlocks ( generator, node, _name, i = 0 ) {
 		condition: generator.contextualise( node.expression ).snippet,
 		block: name
 	}];
-	generateBlock( generator, node, name );
+	generator.generateBlock( node, name );
 
 	if ( node.else && node.else.children.length === 1 &&
 		node.else.children[0].type === 'IfBlock' ) {
@@ -44,7 +21,7 @@ function getConditionsAndBlocks ( generator, node, _name, i = 0 ) {
 			block: node.else ? name : null,
 		});
 		if (node.else) {
-			generateBlock( generator, node.else, name );
+			generator.generateBlock( node.else, name );
 		}
 	}
 	return conditionsAndBlocks;