combine declaredName and identifier

src/Bundle.js

@@ -56,8 +56,8 @@ export default class Bundle {
 
 					// `export default function foo () {...}` -
 					// use the declared name for the export
-					if ( defaultExport.declaredName ) {
-						entryModule.suggestName( 'default', defaultExport.declaredName );
+					if ( defaultExport.identifier ) {
+						entryModule.suggestName( 'default', defaultExport.identifier );
 					}
 
 					// `export default a + b` - generate an export name
@@ -175,7 +175,7 @@ export default class Bundle {
 				// only create a new name if either
 				//   a) it's an expression (`export default 42`) or
 				//   b) it's a name that is reassigned to (`export var a = 1; a = 2`)
-				if ( defaultExport && defaultExport.declaredName && !defaultExport.isModified ) return; // TODO encapsulate check for whether we need synthetic default name
+				if ( defaultExport && defaultExport.identifier && !defaultExport.isModified ) return; // TODO encapsulate check for whether we need synthetic default name
 
 				const defaultName = getSafeName( module.suggestedNames.default );
 				module.replacements.default = defaultName;

src/Module.js

@@ -83,14 +83,16 @@ export default class Module {
 			const isDeclaration = /Declaration$/.test( node.declaration.type );
 			const isAnonymous = /(?:Class|Function)Expression$/.test( node.declaration.type );
 
-			const declaredName = isDeclaration && node.declaration.id.name;
-			const identifier = node.declaration.type === 'Identifier' && node.declaration.name;
+			const identifier = isDeclaration ?
+				node.declaration.id.name :
+				node.declaration.type === 'Identifier' ?
+					node.declaration.name :
+					null;
 
 			this.exports.default = {
 				statement,
 				name: 'default',
-				localName: declaredName || 'default',
-				declaredName,
+				localName: identifier || 'default',
 				identifier,
 				isDeclaration,
 				isAnonymous,
@@ -389,7 +391,7 @@ export default class Module {
 		else if ( name === 'default' && this.exports.default.isDeclaration ) {
 			// We have something like `export default foo` - so we just start again,
 			// searching for `foo` instead of default
-			promise = this.mark( this.exports.default.name );
+			promise = this.mark( this.exports.default.name ); // TODO this can't be right... this.exports.default.name === 'default'
 		}
 
 		else {

src/finalisers/shared/getExportBlock.js

@@ -3,8 +3,7 @@ export default function getExportBlock ( bundle, exportMode, mechanism = 'return
 		const defaultExport = bundle.entryModule.exports.default;
 
 		const defaultExportName = bundle.entryModule.replacements.default ||
-			defaultExport.declaredName || // TODO can these be unified?
-			defaultExport.statement.node.declaration.name;
+			defaultExport.identifier;
 
 		return `${mechanism} ${defaultExportName};`;
 	}