no need to clone ast

src/css/Stylesheet.ts

@@ -6,7 +6,7 @@ import getCodeFrame from '../utils/getCodeFrame';
 import hash from '../utils/hash';
 import Element from '../generators/nodes/Element';
 import { Validator } from '../validate/index';
-import { Node, Parsed, Warning } from '../interfaces';
+import { Node, Ast, Warning } from '../interfaces';
 
 class Rule {
 	selectors: Selector[];
@@ -236,7 +236,7 @@ const keys = {};
 
 export default class Stylesheet {
 	source: string;
-	parsed: Parsed;
+	ast: Ast;
 	filename: string;
 	dev: boolean;
 
@@ -248,9 +248,9 @@ export default class Stylesheet {
 
 	nodesWithCssClass: Set<Node>;
 
-	constructor(source: string, parsed: Parsed, filename: string, dev: boolean) {
+	constructor(source: string, ast: Ast, filename: string, dev: boolean) {
 		this.source = source;
-		this.parsed = parsed;
+		this.ast = ast;
 		this.filename = filename;
 		this.dev = dev;
 
@@ -259,15 +259,15 @@ export default class Stylesheet {
 
 		this.nodesWithCssClass = new Set();
 
-		if (parsed.css && parsed.css.children.length) {
-			this.id = `svelte-${hash(parsed.css.content.styles)}`;
+		if (ast.css && ast.css.children.length) {
+			this.id = `svelte-${hash(ast.css.content.styles)}`;
 
 			this.hasStyles = true;
 
 			const stack: (Rule | Atrule)[] = [];
 			let currentAtrule: Atrule = null;
 
-			walk(this.parsed.css, {
+			walk(this.ast.css, {
 				enter: (node: Node) => {
 					if (node.type === 'Atrule') {
 						const last = stack[stack.length - 1];
@@ -346,7 +346,7 @@ export default class Stylesheet {
 
 		const code = new MagicString(this.source);
 
-		walk(this.parsed.css, {
+		walk(this.ast.css, {
 			enter: (node: Node) => {
 				code.addSourcemapLocation(node.start);
 				code.addSourcemapLocation(node.end);

src/generators/Generator.ts

@@ -13,12 +13,11 @@ import nodeToString from '../utils/nodeToString';
 import wrapModule from './wrapModule';
 import annotateWithScopes, { Scope } from '../utils/annotateWithScopes';
 import getName from '../utils/getName';
-import clone from '../utils/clone';
 import Stylesheet from '../css/Stylesheet';
 import { test } from '../config';
 import nodes from './nodes/index';
 import Fragment from './nodes/Fragment';
-import { Node, GenerateOptions, ShorthandImport, Parsed, CompileOptions, CustomElementOptions } from '../interfaces';
+import { Node, GenerateOptions, ShorthandImport, Ast, CompileOptions, CustomElementOptions } from '../interfaces';
 
 interface Computation {
 	key: string;
@@ -79,8 +78,7 @@ childKeys.Attribute = ['value'];
 export default class Generator {
 	stats: Stats;
 
-	ast: Parsed;
-	parsed: Parsed;
+	ast: Ast;
 	source: string;
 	name: string;
 	options: CompileOptions;
@@ -124,7 +122,7 @@ export default class Generator {
 	usedNames: Set<string>;
 
 	constructor(
-		parsed: Parsed,
+		ast: Ast,
 		source: string,
 		name: string,
 		stylesheet: Stylesheet,
@@ -135,9 +133,7 @@ export default class Generator {
 		stats.start('compile');
 		this.stats = stats;
 
-		this.ast = clone(parsed);
-
-		this.parsed = parsed;
+		this.ast = ast;
 		this.source = source;
 		this.options = options;
 
@@ -193,7 +189,7 @@ export default class Generator {
 			throw new Error(`No tag name specified`); // TODO better error
 		}
 
-		this.fragment = new Fragment(this, parsed.html);
+		this.fragment = new Fragment(this, ast.html);
 		// this.walkTemplate();
 		if (!this.customElement) this.stylesheet.reify();
 	}
@@ -329,7 +325,7 @@ export default class Generator {
 			imports
 		} = this;
 
-		const { js } = this.parsed;
+		const { js } = this.ast;
 
 		const componentDefinition = new CodeBuilder();
 

src/generators/dom/index.ts

@@ -14,7 +14,7 @@ import Stylesheet from '../../css/Stylesheet';
 import Stats from '../../Stats';
 import Block from './Block';
 import { test } from '../../config';
-import { Parsed, CompileOptions, Node } from '../../interfaces';
+import { Ast, CompileOptions, Node } from '../../interfaces';
 
 export class DomGenerator extends Generator {
 	blocks: (Block|string)[];
@@ -31,14 +31,14 @@ export class DomGenerator extends Generator {
 	needsEncapsulateHelper: boolean;
 
 	constructor(
-		parsed: Parsed,
+		ast: Ast,
 		source: string,
 		name: string,
 		stylesheet: Stylesheet,
 		options: CompileOptions,
 		stats: Stats
 	) {
-		super(parsed, source, name, stylesheet, options, stats, true);
+		super(ast, source, name, stylesheet, options, stats, true);
 		this.blocks = [];
 
 		this.readonly = new Set();
@@ -53,7 +53,7 @@ export class DomGenerator extends Generator {
 }
 
 export default function dom(
-	parsed: Parsed,
+	ast: Ast,
 	source: string,
 	stylesheet: Stylesheet,
 	options: CompileOptions,
@@ -61,7 +61,7 @@ export default function dom(
 ) {
 	const format = options.format || 'es';
 
-	const generator = new DomGenerator(parsed, source, options.name || 'SvelteComponent', stylesheet, options, stats);
+	const generator = new DomGenerator(ast, source, options.name || 'SvelteComponent', stylesheet, options, stats);
 
 	const {
 		computations,

src/generators/server-side-rendering/index.ts

@@ -7,7 +7,7 @@ import visit from './visit';
 import { removeNode, removeObjectKey } from '../../utils/removeNode';
 import getName from '../../utils/getName';
 import globalWhitelist from '../../utils/globalWhitelist';
-import { Parsed, Node, CompileOptions } from '../../interfaces';
+import { Ast, Node, CompileOptions } from '../../interfaces';
 import { AppendTarget } from './interfaces';
 import { stringify } from '../../utils/stringify';
 
@@ -17,14 +17,14 @@ export class SsrGenerator extends Generator {
 	appendTargets: AppendTarget[];
 
 	constructor(
-		parsed: Parsed,
+		ast: Ast,
 		source: string,
 		name: string,
 		stylesheet: Stylesheet,
 		options: CompileOptions,
 		stats: Stats
 	) {
-		super(parsed, source, name, stylesheet, options, stats, false);
+		super(ast, source, name, stylesheet, options, stats, false);
 		this.bindings = [];
 		this.renderCode = '';
 		this.appendTargets = [];
@@ -44,7 +44,7 @@ export class SsrGenerator extends Generator {
 }
 
 export default function ssr(
-	parsed: Parsed,
+	ast: Ast,
 	source: string,
 	stylesheet: Stylesheet,
 	options: CompileOptions,
@@ -52,7 +52,7 @@ export default function ssr(
 ) {
 	const format = options.format || 'cjs';
 
-	const generator = new SsrGenerator(parsed, source, options.name || 'SvelteComponent', stylesheet, options, stats);
+	const generator = new SsrGenerator(ast, source, options.name || 'SvelteComponent', stylesheet, options, stats);
 
 	const { computations, name, templateProperties } = generator;
 

src/index.ts

@@ -5,7 +5,7 @@ import generateSSR from './generators/server-side-rendering/index';
 import Stats from './Stats';
 import { assign } from './shared/index.js';
 import Stylesheet from './css/Stylesheet';
-import { Parsed, CompileOptions, Warning, PreprocessOptions, Preprocessor } from './interfaces';
+import { Ast, CompileOptions, Warning, PreprocessOptions, Preprocessor } from './interfaces';
 import { SourceMap } from 'magic-string';
 
 const version = '__VERSION__';
@@ -108,7 +108,7 @@ export async function preprocess(source: string, options: PreprocessOptions) {
 
 function compile(source: string, _options: CompileOptions) {
 	const options = normalizeOptions(_options);
-	let parsed: Parsed;
+	let ast: Ast;
 
 	const stats = new Stats({
 		onwarn: options.onwarn
@@ -116,7 +116,7 @@ function compile(source: string, _options: CompileOptions) {
 
 	try {
 		stats.start('parse');
-		parsed = parse(source, options);
+		ast = parse(source, options);
 		stats.stop('parse');
 	} catch (err) {
 		options.onerror(err);
@@ -124,20 +124,20 @@ function compile(source: string, _options: CompileOptions) {
 	}
 
 	stats.start('stylesheet');
-	const stylesheet = new Stylesheet(source, parsed, options.filename, options.dev);
+	const stylesheet = new Stylesheet(source, ast, options.filename, options.dev);
 	stats.stop('stylesheet');
 
 	stats.start('validate');
-	validate(parsed, source, stylesheet, stats, options);
+	validate(ast, source, stylesheet, stats, options);
 	stats.stop('validate');
 
 	if (options.generate === false) {
-		return { ast: parsed, stats, js: null, css: null };
+		return { ast: ast, stats, js: null, css: null };
 	}
 
 	const compiler = options.generate === 'ssr' ? generateSSR : generate;
 
-	return compiler(parsed, source, stylesheet, options, stats);
+	return compiler(ast, source, stylesheet, options, stats);
 };
 
 function create(source: string, _options: CompileOptions = {}) {

src/interfaces.ts

@@ -20,7 +20,7 @@ export interface Parser {
 	metaTags: {};
 }
 
-export interface Parsed {
+export interface Ast {
 	html: Node;
 	css: Node;
 	js: Node;

src/parse/index.ts

@@ -5,7 +5,7 @@ import { whitespace } from '../utils/patterns';
 import { trimStart, trimEnd } from '../utils/trim';
 import reservedNames from '../utils/reservedNames';
 import fullCharCodeAt from '../utils/fullCharCodeAt';
-import { Node, Parsed } from '../interfaces';
+import { Node, Ast } from '../interfaces';
 import error from '../utils/error';
 
 interface ParserOptions {
@@ -223,7 +223,7 @@ export class Parser {
 export default function parse(
 	template: string,
 	options: ParserOptions = {}
-): Parsed {
+): Ast {
 	const parser = new Parser(template, options);
 	return {
 		html: parser.html,

src/utils/clone.ts

@@ -1,18 +0,0 @@
-import { Node, Parsed } from '../interfaces';
-
-export default function clone(node: Node|Parsed) {
-	const cloned: any = {};
-
-	for (const key in node) {
-		const value = node[key];
-		if (Array.isArray(value)) {
-			cloned[key] = value.map(clone);
-		} else if (value && typeof value === 'object') {
-			cloned[key] = clone(value);
-		} else {
-			cloned[key] = value;
-		}
-	}
-
-	return cloned;
-}

src/validate/index.ts

@@ -6,7 +6,7 @@ import Stats from '../Stats';
 import error from '../utils/error';
 import Stylesheet from '../css/Stylesheet';
 import Stats from '../Stats';
-import { Node, Parsed, CompileOptions, Warning } from '../interfaces';
+import { Node, Ast, CompileOptions, Warning } from '../interfaces';
 
 export class Validator {
 	readonly source: string;
@@ -34,7 +34,7 @@ export class Validator {
 		actions: Set<string>;
 	};
 
-	constructor(parsed: Parsed, source: string, stats: Stats, options: CompileOptions) {
+	constructor(ast: Ast, source: string, stats: Stats, options: CompileOptions) {
 		this.source = source;
 		this.stats = stats;
 
@@ -93,7 +93,7 @@ export class Validator {
 }
 
 export default function validate(
-	parsed: Parsed,
+	ast: Ast,
 	source: string,
 	stylesheet: Stylesheet,
 	stats: Stats,
@@ -117,27 +117,27 @@ export default function validate(
 			});
 		}
 
-		const validator = new Validator(parsed, source, stats, {
+		const validator = new Validator(ast, source, stats, {
 			name,
 			filename,
 			dev,
 			parser
 		});
 
-		if (parsed.js) {
-			validateJs(validator, parsed.js);
+		if (ast.js) {
+			validateJs(validator, ast.js);
 		}
 
-		if (parsed.css) {
+		if (ast.css) {
 			stylesheet.validate(validator);
 		}
 
-		if (parsed.html) {
-			validateHtml(validator, parsed.html);
+		if (ast.html) {
+			validateHtml(validator, ast.html);
 		}
 
 		// need to do a second pass of the JS, now that we've analysed the markup
-		if (parsed.js && validator.defaultExport) {
+		if (ast.js && validator.defaultExport) {
 			const categories = {
 				components: 'component',
 				// TODO helpers require a bit more work — need to analyse all expressions