[antlr-interest] "prog : .+ ; " ==> "no viable alternative at character" (antlr-3.1.2)

[Valery Khamenya]

Hi Kirby and all,

> In this case, I'm pretty sure it's because you don't have a lexer rule...

OK, I see, thank you!

Let's try this (pure) lexer grammar:

***************************
lexer grammar ANTLRLexer;
options {
	language=Python;
	k=4;
}
INT: 'int';
ANY: .;
***************************

I expect a token stream in output consisting of single characters and 'int'.
For example: 'inint' ==> ['i', 'n', 'int']

When I feed lexer with 'int' it's OK.
When I feed lexer with 'inX' it's gives me:

  "line 1:2 mismatched character u'x' expecting 't' "

Why there is no rollback from INT rule to ANY by appearance of 'X'?

How to get the expected? (I thought it is solvable on pure lexer level)

Thanks in advance,
Valery