[antlr-interest] ClassCastExceptions extending CommonAST

[Terence Parr]

On Dec 13, 2004, at 9:27 PM, inyoursadmachine wrote:
> Hi,
> I'm brand new to ANTLR and this mailing list.  I'm using ANTLR to
> write an emulator for a C-like language but
> getting 'ClassCastExceptions' when using extension of CommonAST. At
> first I thought it was me but when I ran in to the -exact- same
> problem with the 'Pascal' example I thought I'd ask here.
>
>
> I'm using ANTLR 2.7.4 and Java version is 1.5
>
> C:\>java -version
> java version "1.5.0"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
> Java HotSpot(TM) Client VM (build 1.5.0-b64, mixed mode, sharing)
>
>
> C:\Program Files\ANTLR\antlr-2.7.4\examples\java\pascal>java
> PascalParser big.pas
> Parsing...
>    C:\Program Files\ANTLR\antlr-2.7.4\examples\java\pascal\big.pas
> Can't find/access AST Node typePascalAST

Hi. :)  The error should help out I think.  Seems it's trying to create 
those node types, but can't.  Look for the invocation of the parser and 
see if it is setting the node type.  You might also look at the 
ASTLabel option in the grammar to see if that's set.  Is 
typePascalAST.java around in the CLASSPATH?

Ter





 
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