feat(Parser): improve error handling

2014-11-05 13:53:45 -08:00
parent ac060ed405
commit 977bc77c96
3 changed files with 25 additions and 3 deletions
--- a/modules/change_detection/src/parser/parser.js
+++ b/modules/change_detection/src/parser/parser.js
@ -150,9 +150,16 @@ class _ParseAST {
  }

  parseExpression() {
+    var start = this.inputIndex;
    var result = this.parseConditional();

    while (this.next.isOperator('=')) {
+      if (!result.isAssignable) {
+        var end = this.inputIndex;
+        var expression = this.input.substring(start, end);
+        this.error(`Expression ${expression} is not assignable`);
+      }
+
      this.expectOperator('=');
      result = new Assignment(result, this.parseConditional());
    }