[antlr-interest] No errors output by v4 daily build?

[Terence Parr]

boy,That is very weird because I specifically added syntax checks for the missing ';' and so on. let me try one.

ok, yeah, I don't have the check in there that the filename is the same as the grammar name. here is one check for the missing ';'

~/antlr/code/antlr4/main/tool/playground $ cat XX.g
grammar E;

a : A 
~/antlr/code/antlr4/main/tool/playground $ a4 XX.g
error(15): XX.g:4:0: mismatched input '<EOF>' expecting SEMI while matching a rule

 and another

~/antlr/code/antlr4/main/tool/playground $ cat XX.g
grammar E;

a : A 
b : B ;
~/antlr/code/antlr4/main/tool/playground $ a4 XX.g
error(15): XX.g:4:0: unterminated rule (missing ';') detected at 'b :' while looking for rule element

 perhaps you should send me an example.

Ter

On Jan 20, 2012, at 8:54 AM, Peter Boughton wrote:

> Hi Terence,
> 
>> what does "grammar has any errors" mean exactly?
> 
> Well, simply that if there is anything wrong with the syntax/contents
> of the grammar file.
> 
> For example, if I name the file "a.g" and the first line is "grammar
> b", or if I delete a semi-colon from the end of a rule, so it's not
> valid ANTLR syntax, or if I try to refer to a rule that doesn't exist
> yet, or have an unescaped apostrophe, and so on.
> 
> The only way to tell if the grammar is ok is to check if the generated
> files exist and if the modified date is up-to-date. If it doesn't
> work, there's no easy way to know what the error is.
> 
> Making sense now?
> 
> Thanks,
> 
> Peter
> 
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