feat(parser): added 'sourceFile' option

README.md

@@ -117,4 +117,5 @@ The second argument allows you to specify various options:
 | `parenthesizedExpr`	| Enable non-standard parenthesized expression node |
 | `raw`             | Attach raw property to each literal node |
 | `ranges`          | Append start and end offsets to each node |
+| `sourceFile`          | Adds a source attribute in every node’s loc object when the locations option is `true`.|
 | `webcompat`       | Enable [web compability](https://tc39.github.io/ecma262/#sec-additional-ecmascript-features-for-web-browsers) |

package.json

@@ -1,6 +1,6 @@
 {
   "name": "meriyah",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "A 100% compliant, self-hosted javascript parser with high focus on both performance and stability",
   "main": "dist/meriyah.umd.js",
   "module": "dist/meriyah.esm.js",

src/common.ts

@@ -133,8 +133,8 @@ export interface ParserState {
   startIndex: number;
   startColumn: number;
   startLine: number;
-  columnOffset: number;
-  lineOffset: number;
+  columnPos: number;
+  linePos: number;
   end: number;
   token: Token;
   tokenValue: any;
@@ -143,6 +143,7 @@ export interface ParserState {
     pattern: string;
     flags: string;
   };
+  sourceFile: string | void;
   assignable: AssignmentKind | DestructuringKind;
   destructible: AssignmentKind | DestructuringKind;
   nextCP: number;
@@ -400,6 +401,10 @@ export function finishNode<T extends Node>(
         column: parser.startColumn,
       }
     };
+
+    if (parser.sourceFile) {
+      node.loc.source = parser.sourceFile;
+  }
   }
 
   return node;

src/lexer/scan.ts

@@ -174,7 +174,7 @@ export const TokenLookup = [
  * @param context Context masks
  */
 export function nextToken(parser: ParserState, context: Context): void {
-  parser.flags &= ~Flags.NewLine;
+  parser.flags = (parser.flags | Flags.NewLine) ^ Flags.NewLine;
   parser.startIndex = parser.index;
   parser.startColumn = parser.column;
   parser.startLine = parser.line;
@@ -186,8 +186,9 @@ export function scanSingleToken(parser: ParserState, context: Context, state: Sc
 
   while (parser.index < parser.end) {
     parser.tokenIndex = parser.index;
-    parser.columnOffset = parser.column;
-    parser.lineOffset = parser.line;
+    parser.columnPos = parser.column;
+    parser.linePos = parser.line;
+
     const first = parser.nextCP;
 
     if (first <= 0x7e) {