add a few type annotations

src/generators/Generator.ts

@@ -14,7 +14,11 @@ import annotateWithScopes from '../utils/annotateWithScopes';
 const test = typeof global !== 'undefined' && global.__svelte_test;
 
 export default class Generator {
-	constructor ( parsed, source, name, options ) {
+	source: string
+	name: string
+	// TODO all the rest...
+
+	constructor ( parsed, source: string, name: string, options ) {
 		this.parsed = parsed;
 		this.source = source;
 		this.name = name;

src/generators/dom/Block.ts

@@ -55,7 +55,7 @@ export default class Block {
 		});
 	}
 
-	addElement ( name, renderStatement, parentNode, needsIdentifier = false ) {
+	addElement ( name: string, renderStatement: string, parentNode, needsIdentifier = false ) {
 		const isToplevel = !parentNode;
 		if ( needsIdentifier || isToplevel ) {
 			this.builders.create.addLine(
@@ -72,7 +72,7 @@ export default class Block {
 		}
 	}
 
-	addVariable ( name, init ) {
+	addVariable ( name: string, init ) {
 		if ( this.variables.has( name ) && this.variables.get( name ) !== init ) {
 			throw new Error( `Variable '${name}' already initialised with a different value` );
 		}
@@ -80,7 +80,7 @@ export default class Block {
 		this.variables.set( name, init );
 	}
 
-	alias ( name ) {
+	alias ( name: string ) {
 		if ( !this.aliases.has( name ) ) {
 			this.aliases.set( name, this.getUniqueName( name ) );
 		}
@@ -100,7 +100,7 @@ export default class Block {
 		return this.generator.findDependencies( this.contextDependencies, this.indexes, expression );
 	}
 
-	mount ( name, parentNode ) {
+	mount ( name: string, parentNode: string ) {
 		if ( parentNode ) {
 			this.builders.create.addLine( `${this.generator.helper( 'appendNode' )}( ${name}, ${parentNode} );` );
 		} else {

src/generators/shared/utils/getIntro.ts

@@ -1,7 +1,7 @@
 import deindent from '../../../utils/deindent.js';
 import getGlobals from './getGlobals';
 
-export default function getIntro ( format, options, imports ) {
+export default function getIntro ( format: string, options, imports ) {
 	if ( format === 'es' ) return '';
 	if ( format === 'amd' ) return getAmdIntro( options, imports );
 	if ( format === 'cjs' ) return getCjsIntro( options, imports );
@@ -69,7 +69,7 @@ function paramString ( imports ) {
 	return imports.length ? ` ${imports.map( dep => dep.name ).join( ', ' )} ` : '';
 }
 
-function removeExtension ( file ) {
+function removeExtension ( file: string ) {
 	const index = file.lastIndexOf( '.' );
 	return ~index ? file.slice( 0, index ) : file;
 }

src/generators/shared/utils/getOutro.ts

@@ -1,6 +1,6 @@
 import getGlobals from './getGlobals';
 
-export default function getOutro ( format, name, options, imports ) {
+export default function getOutro ( format: string, name: string, options, imports ) {
 	if ( format === 'es' ) {
 		return `export default ${name};`;
 	}

src/parse/read/directives.ts

@@ -1,7 +1,7 @@
 import { parseExpressionAt } from 'acorn';
 import spaces from '../../utils/spaces.js';
 
-function readExpression ( parser, start, quoteMark ) {
+function readExpression ( parser, start: number, quoteMark ) {
 	let str = '';
 	let escaped = false;
 
@@ -43,7 +43,7 @@ function readExpression ( parser, start, quoteMark ) {
 	return expression;
 }
 
-export function readEventHandlerDirective ( parser, start, name ) {
+export function readEventHandlerDirective ( parser, start: number, name: string ) {
 	const quoteMark = (
 		parser.eat( `'` ) ? `'` :
 		parser.eat( `"` ) ? `"` :
@@ -67,7 +67,7 @@ export function readEventHandlerDirective ( parser, start, name ) {
 	};
 }
 
-export function readBindingDirective ( parser, start, name ) {
+export function readBindingDirective ( parser, start: number, name: string ) {
 	let value;
 
 	if ( parser.eat( '=' ) ) {
@@ -130,7 +130,7 @@ export function readBindingDirective ( parser, start, name ) {
 	};
 }
 
-export function readTransitionDirective ( parser, start, name, type ) {
+export function readTransitionDirective ( parser, start: number, name: string, type: string ) {
 	let expression = null;
 
 	if ( parser.eat( '=' ) ) {

src/parse/read/script.ts

@@ -3,7 +3,7 @@ import spaces from '../../utils/spaces.js';
 
 const scriptClosingTag = '<\/script>';
 
-export default function readScript ( parser, start, attributes ) {
+export default function readScript ( parser, start: number, attributes ) {
 	const scriptStart = parser.index;
 	const scriptEnd = parser.template.indexOf( scriptClosingTag, scriptStart );
 

src/parse/read/style.ts

@@ -1,7 +1,7 @@
 import parse from 'css-tree/lib/parser/index.js';
 import walk from 'css-tree/lib/utils/walk.js';
 
-export default function readStyle ( parser, start, attributes ) {
+export default function readStyle ( parser, start: number, attributes ) {
 	const contentStart = parser.index;
 	const styles = parser.readUntil( /<\/style>/ );
 	const contentEnd = parser.index;

src/parse/utils/hash.ts

@@ -1,5 +1,5 @@
 // https://github.com/darkskyapp/string-hash/blob/master/index.js
-export default function hash ( str ) {
+export default function hash ( str: string ) {
 	let hash = 5381;
 	let i = str.length;
 

src/parse/utils/html.ts

@@ -3,7 +3,7 @@ import htmlEntities from './entities';
 const windows1252 = [ 8364, 129, 8218, 402, 8222, 8230, 8224, 8225, 710, 8240, 352, 8249, 338, 141, 381, 143, 144, 8216, 8217, 8220, 8221, 8226, 8211, 8212, 732, 8482, 353, 8250, 339, 157, 382, 376 ];
 const entityPattern = new RegExp( `&(#?(?:x[\\w\\d]+|\\d+|${Object.keys( htmlEntities ).join( '|' )}));?`, 'g' );
 
-export function decodeCharacterReferences ( html ) {
+export function decodeCharacterReferences ( html: string ) {
 	return html.replace( entityPattern, ( match, entity ) => {
 		let code;
 
@@ -31,7 +31,7 @@ const NUL = 0;
 // to replace them ourselves
 //
 // Source: http://en.wikipedia.org/wiki/Character_encodings_in_HTML#Illegal_characters
-function validateCode ( code ) {
+function validateCode ( code: number ) {
 	// line feed becomes generic whitespace
 	if ( code === 10 ) {
 		return 32;

src/shared/_build.js

@@ -31,5 +31,5 @@ fs.readdirSync( __dirname ).forEach( file => {
 	});
 });
 
-fs.writeFileSync( 'src/generators/dom/shared.js', `// this file is auto-generated, do not edit it
+fs.writeFileSync( 'src/generators/dom/shared.ts', `// this file is auto-generated, do not edit it
 export default ${JSON.stringify( declarations, null, '\t' )};` );

src/utils/CodeBuilder.ts

@@ -1,18 +1,25 @@
-const LINE = {};
-const BLOCK = {};
+enum ChunkType {
+	Line,
+	Block
+}
 
 export default class CodeBuilder {
+	result: string
+	first: ChunkType
+	last: ChunkType
+	lastCondition: string
+
 	constructor ( str = '' ) {
 		this.result = str;
 
-		const initial = str ? ( /\n/.test( str ) ? BLOCK : LINE ) : null;
+		const initial = str ? ( /\n/.test( str ) ? ChunkType.Block : ChunkType.Line ) : null;
 		this.first = initial;
 		this.last = initial;
 
 		this.lastCondition = null;
 	}
 
-	addConditionalLine ( condition, line ) {
+	addConditionalLine ( condition: string, line: string ) {
 		if ( condition === this.lastCondition ) {
 			this.result += `\n\t${line}`;
 		} else {
@@ -24,41 +31,41 @@ export default class CodeBuilder {
 			this.lastCondition = condition;
 		}
 
-		this.last = BLOCK;
+		this.last = ChunkType.Block;
 	}
 
-	addLine ( line ) {
+	addLine ( line: string ) {
 		if ( this.lastCondition ) {
 			this.result += `\n}`;
 			this.lastCondition = null;
 		}
 
-		if ( this.last === BLOCK ) {
+		if ( this.last === ChunkType.Block ) {
 			this.result += `\n\n${line}`;
-		} else if ( this.last === LINE ) {
+		} else if ( this.last === ChunkType.Line ) {
 			this.result += `\n${line}`;
 		} else {
 			this.result += line;
 		}
 
-		this.last = LINE;
-		if ( !this.first ) this.first = LINE;
+		this.last = ChunkType.Line;
+		if ( !this.first ) this.first = ChunkType.Line;
 	}
 
-	addLineAtStart ( line ) {
-		if ( this.first === BLOCK ) {
+	addLineAtStart ( line: string ) {
+		if ( this.first === ChunkType.Block ) {
 			this.result = `${line}\n\n${this.result}`;
-		} else if ( this.first === LINE ) {
+		} else if ( this.first === ChunkType.Line ) {
 			this.result = `${line}\n${this.result}`;
 		} else {
 			this.result += line;
 		}
 
-		this.first = LINE;
-		if ( !this.last ) this.last = LINE;
+		this.first = ChunkType.Line;
+		if ( !this.last ) this.last = ChunkType.Line;
 	}
 
-	addBlock ( block ) {
+	addBlock ( block: string ) {
 		if ( this.lastCondition ) {
 			this.result += `\n}`;
 			this.lastCondition = null;
@@ -70,19 +77,19 @@ export default class CodeBuilder {
 			this.result += block;
 		}
 
-		this.last = BLOCK;
-		if ( !this.first ) this.first = BLOCK;
+		this.last = ChunkType.Block;
+		if ( !this.first ) this.first = ChunkType.Block;
 	}
 
-	addBlockAtStart ( block ) {
+	addBlockAtStart ( block: string ) {
 		if ( this.result ) {
 			this.result = `${block}\n\n${this.result}`;
 		} else {
 			this.result += block;
 		}
 
-		this.first = BLOCK;
-		if ( !this.last ) this.last = BLOCK;
+		this.first = ChunkType.Block;
+		if ( !this.last ) this.last = ChunkType.Block;
 	}
 
 	isEmpty () {

src/utils/getCodeFrame.ts

@@ -1,10 +1,10 @@
 import spaces from './spaces.js';
 
-function tabsToSpaces ( str ) {
+function tabsToSpaces ( str: string ) {
 	return str.replace( /^\t+/, match => match.split( '\t' ).join( '  ' ) );
 }
 
-export default function getCodeFrame ( source, line, column ) {
+export default function getCodeFrame ( source: string, line: number, column: number ) {
 	const lines = source.split( '\n' );
 
 	const frameStart = Math.max( 0, line - 2 );

src/utils/isReference.ts

@@ -1,4 +1,4 @@
-export default function isReference ( node, parent ) {
+export default function isReference ( node, parent ): boolean {
 	if ( node.type === 'MemberExpression' ) {
 		return !node.computed && isReference( node.object, node );
 	}

src/utils/isVoidElementName.ts

@@ -1,5 +1,5 @@
 const voidElementNames = /^(?:area|base|br|col|command|embed|hr|img|input|keygen|link|meta|param|source|track|wbr)$/;
 
-export default function isVoidElementName ( name ) {
+export default function isVoidElementName ( name: string ) {
 	return voidElementNames.test( name ) || name.toLowerCase() === '!doctype';
 }

src/utils/toSource.ts

@@ -1,6 +1,6 @@
 import deindent from './deindent.js';
 
-export default function toSource ( thing ) {
+export default function toSource ( thing: any ) :string {
 	if ( typeof thing === 'function' ) {
 		return normaliseIndentation( thing.toString() );
 	}
@@ -25,7 +25,7 @@ export default function toSource ( thing ) {
 	return JSON.stringify( thing );
 }
 
-function normaliseIndentation ( str ) {
+function normaliseIndentation ( str: string ) {
 	const lines = str.split( '\n' ).slice( 1, -1 );
 	let minIndentation = Infinity;
 

src/utils/trim.ts

@@ -1,13 +1,13 @@
 import { whitespace } from './patterns';
 
-export function trimStart ( str ) {
+export function trimStart ( str: string ) {
 	let i = 0;
 	while ( whitespace.test( str[i] ) ) i += 1;
 
 	return str.slice( i );
 }
 
-export function trimEnd ( str ) {
+export function trimEnd ( str: string ) {
 	let i = str.length;
 	while ( whitespace.test( str[ i - 1 ] ) ) i -= 1;
 

tsconfig.json

@@ -4,7 +4,9 @@
         "noImplicitAny": true,
         "diagnostics": true,
         "noImplicitThis": true,
-        "noEmitOnError": true
+        "noEmitOnError": true,
+        "allowJs": true,
+        "lib": ["es5", "es6", "dom"]
     },
     "target": "ES5",
     "include": [