clarify lex error message

leebyron · leebyron · commit b2cf85c4dbc0 · 2021-04-16T13:21:19.000-07:00
diff --git a/src/language/__tests__/lexer-test.js b/src/language/__tests__/lexer-test.js
@@ -649,7 +649,8 @@ describe('Lexer', () => {
     });
 
     expectSyntaxError('.123').to.deep.equal({
-      message: 'Syntax Error: Invalid number, expected digit before ".".',
+      message:
+        'Syntax Error: Invalid number, expected digit before ".", did you mean "0."?.',
       locations: [{ line: 1, column: 1 }],
     });
 
diff --git a/src/language/lexer.js b/src/language/lexer.js
@@ -311,7 +311,7 @@ function readDot(
     throw syntaxError(
       source,
       start,
-      'Invalid number, expected digit before ".".',
+      'Invalid number, expected digit before ".", did you mean "0."?.',
     );
   }
   return new Token(TokenKind.DOT, start, start + 1, line, col, prev);

Original file line number	Diff line number	Diff line change
`@@ -311,7 +311,7 @@ function readDot(`
`311`	`311`	`throw syntaxError(`
`312`	`312`	`source,`
`313`	`313`	`start,`
`314`		`- 'Invalid number, expected digit before ".".',`
	`314`	`+ 'Invalid number, expected digit before ".", did you mean "0."?.',`
`315`	`315`	`);`
`316`	`316`	`}`
`317`	`317`	`return new Token(TokenKind.DOT, start, start + 1, line, col, prev);`