Description Dénes Harmath 2010-10-05 19:47:50 EDT

Build Identifier: M20100909-0800

The lexer & parser even when backtracking can't handle the following case (keywords which share the same prefix):

Reproducible: Always

Steps to Reproduce:
Grammar:

grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals

generate myDsl "http://www.xtext.org/example/mydsl/MyDsl"

Model: expressions+=Expression+;

Expression: Bar | Baz | Other;

Bar: {Bar} "\\bar";

Baz: {Baz} "\\baz";

Other hidden(): "\\" id=ID;

Generator options:

fragment = parser.antlr.ex.rt.AntlrGeneratorFragment {
options = {
backtrackLexer = true
backtrack = true
}
}

Input:

\b

Error:

no viable alternative at character '\'

Xtext version: 1.0.1.v201008251220