[antlr-interest] Parser Exception-Handlers with Labels
Carleton Coffrin
carleton.coffrin at gmail.com
Wed Jun 14 09:37:42 PDT 2006
I am using the Java ANTLR compiler 2.7.5 and am having some difficulty
using labeled Exception-Handlers. When I use a label to refer to a
grammar rule the code for that exception is not generated. For
example,
identifier returns [ASTIdentifier n = null] : x:ID { n = new
ASTIdentifier(tok(x)); }
;
exception catch [RecognitionException ex] {reportError(ex,
"identifier message");}
exception[x] catch [TokenStreamException ex] {reportError(ex, "ID
token Mmssage");} //This works great!
autoDef {ASTIdentifier n;}
: auto:"auto" n=identifier
;
exception catch [RecognitionException ex] {reportError(ex,
"autoDef message");}
exception[n] catch [This does] {not(get,"identifier rule
message");} //<-------------- This never makes it to the generated
code
I have struggled to find any documentation on useing labeled
Exception-Handlers, this is my last resort. If this is not best venue
for this inquery I am pleased to redirect it.
-Carleton
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