Merge pull request #1296 from sveltejs/fix-errors

fix CompileError constructor

src/parse/index.ts

@@ -8,19 +8,7 @@ import reservedNames from '../utils/reservedNames';
 import fullCharCodeAt from '../utils/fullCharCodeAt';
 import hash from '../utils/hash';
 import { Node, Parsed } from '../interfaces';
-import CompileError from '../utils/CompileError';
-
-class ParseError extends CompileError {
-	constructor(
-		message: string,
-		template: string,
-		index: number,
-		filename: string
-	) {
-		super(message, template, index, filename);
-		this.name = 'ParseError';
-	}
-}
+import error from '../utils/error';
 
 interface ParserOptions {
 	filename?: string;
@@ -109,7 +97,12 @@ export class Parser {
 	}
 
 	error(message: string, index = this.index) {
-		throw new ParseError(message, this.template, index, this.filename);
+		error(message, {
+			name: 'ParseError',
+			source: this.template,
+			start: index,
+			filename: this.filename
+		});
 	}
 
 	eat(str: string, required?: boolean, message?: string) {

src/utils/error.ts

@@ -0,0 +1,37 @@
+import { locate } from 'locate-character';
+import getCodeFrame from '../utils/getCodeFrame';
+
+class CompileError extends Error {
+	loc: { line: number, column: number };
+	end: { line: number, column: number };
+	pos: number;
+	filename: string;
+	frame: string;
+
+	toString() {
+		return `${this.message} (${this.loc.line}:${this.loc.column})\n${this.frame}`;
+	}
+}
+
+export default function error(message: string, props: {
+	name: string,
+	source: string,
+	filename: string,
+	start: number,
+	end?: number
+}) {
+	const error = new CompileError(message);
+	error.name = props.name;
+
+	const start = locate(props.source, props.start);
+	const end = locate(props.source, props.end || props.start);
+
+	error.loc = { line: start.line + 1, column: start.column };
+	error.end = { line: end.line + 1, column: end.column };
+	error.pos = props.start;
+	error.filename = props.filename;
+
+	error.frame = getCodeFrame(props.source, start.line, start.column);
+
+	throw error;
+}

src/validate/index.ts

@@ -2,22 +2,10 @@ import validateJs from './js/index';
 import validateHtml from './html/index';
 import { getLocator, Location } from 'locate-character';
 import getCodeFrame from '../utils/getCodeFrame';
-import CompileError from '../utils/CompileError';
+import error from '../utils/error';
 import Stylesheet from '../css/Stylesheet';
 import { Node, Parsed, CompileOptions, Warning } from '../interfaces';
 
-class ValidationError extends CompileError {
-	constructor(
-		message: string,
-		template: string,
-		pos: { start: number, end: number },
-		filename: string,
-	) {
-		super(message, template, pos.start, filename, pos.end);
-		this.name = 'ValidationError';
-	}
-}
-
 export class Validator {
 	readonly source: string;
 	readonly filename: string;
@@ -71,7 +59,13 @@ export class Validator {
 	}
 
 	error(message: string, pos: { start: number, end: number }) {
-		throw new ValidationError(message, this.source, pos, this.filename);
+		error(message, {
+			name: 'ValidationError',
+			source: this.source,
+			start: pos.start,
+			end: pos.end,
+			filename: this.filename
+		});
 	}
 
 	warn(message: string, pos: { start: number, end: number }) {