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I am developing a formula evaluation software, using an ANTLR lexer, parser
and tree-parser.
I have some doubts about how to specify grammar and semantic actions for a
“return” clause.
Now, a return clause is specified as ^(RETURN expression).
Is there any easy way for stopping tree-parsing and
I'm looking for a C++ grammar for ANTLR v3. Does one exist? If not
yet, what is the status?
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Y
Actually, your approach is wrong here. What you want to aim at in the parser is
to accept all the syntax that can possibly be good but if it is not, can be
rejected using semantic checks later. This is because a good semantic error
such as "not able to use 'v2' when you utilize 'b'" is much more
Use C traget.
Have added -trace option... But it have generated JAVA code for every rule
"System.out.println("exit entity_decl "+LT(1)+" failed="+failed+"
backtracking="+BACKTRACKING);"
??? why java not C?
What about -debug option? It's also not working (see my last message).
Could u write
Debug should work OK from a parser but tree parser debugging probably isn't too
hot. Up to press nobody has really needed to use it. The trace option isn't
really implemented but the conditionals are still in the template so that I can
come back to it some day. In general I find it more useful
On Tue, Oct 6, 2009 at 5:51 PM, Graham Wideman wrote:
>
> Anyhow, it looks to me like a '!' in this position is recognized but
> ignored -- either a vestige of a no-longer active feature, or an
> anticipation of a future feature?
>
> -- Graham
>
>
In ANTLR v2, it turns off AST construction for the
Has anyone worked out the exact configuration for MSBUILD instructions for
adding in to csproj files in VS2008 with the C# target? The Wiki version may
have worked fine for VS2005 but in VS2008 it does not encapsulate dependencies
properly and the .cs files get compiled before the .g files, whic
I disabled the clean due to problems with P4 having the generated files
readonly on disk. You can use it as a base for future improvements if
you want.
This forces the correct build order so you only have to build once (I
included the import line just so you see where I placed it). This
configu
The only complete working grammar for ANTLR v3 written in ANTLR v3 is
the set of grammars in my C# port, and they use the CSharp3 target. The
C# port of the ANTLR tool uses these grammars internally for all its
processing, so they are tested working. It would take a significant
amount of work to p
Cool. Perhps you can put this in the Wiki artivcle?
One question - when I have 3 grammar files in the project, is that just the one
ItemGroup or multiple, one per .g file?
Jim
From: Sam Harwell [mailto:sharw...@pixelminegames.com]
Sent: Wednesday, October 07, 2009 11:29 AM
To: Jim Idl
I think that the OP meant is there a set of grammars that parse C++, but are
written for ANTLR v3 rather than v2? As far as I know, the answer is no. C++ is
not the easiest thing to parse and it cannot be done purely with grammar.
Jim
> -Original Message-
> From: antlr-interest-boun...
At 09:37 6/10/2009, Kaleb Pederson wrote:
>After some investigation, I found that the reason for the
>failure was that EOF wasn't in the expected follow set,
>which makes sense when I'm parsing the whole language.
>
>As a workaround, I changed my production, adding EOF as an
>optional termin
Can anybody recommend some good links to best practices for AST building?
In the past, I've manually built heterogeneous trees via the actions
associated with various productions. This works, but I'm hoping to
find something better.
I've been looking at the ANTLR examples and how they generate
Hi,
I have a couple of rules that I don't know how to make them not ambiguous
First rule is:
STRING_LITERAL
: '"' ( EscapeSequence | ~('\\'|'"') )* '"'
;
The second one is:
math_formula : '"' expression '"' ;
The expression rule is similar to C expression rule.
Appreciate any help.
More clarification to the rules
the math_forumla will be on the LHS, e.g. for the syntax
"variable_name" = "&array[2]"
where the variable_name shall be a STRING, and the &array[2] shall be an
expression.
On Wed, Oct 7, 2009 at 4:42 PM, Blue Doze
> wrote:
> Hi,
>
> I have a couple of rules that
Sorry, the math_formula is RHS
On Wed, Oct 7, 2009 at 5:22 PM, Blue Doze wrote:
> More clarification to the rules
> the math_forumla will be on the LHS, e.g. for the syntax
>
> "variable_name" = "&array[2]"
> where the variable_name shall be a STRING, and the &array[2] shall be an
> expression.
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