[antlr-interest] Reporting errors from rules
Florian Weimer
fw at deneb.enyo.de
Tue Sep 2 03:54:30 PDT 2008
I'd like to report errors from rules because I want to reuse existing,
non-ANTLR parsers and make the lexer rules a bit more lenient than
what's actually in the language. For instance, in
IPV4_ADDRESS : ('0' .. '9' | '.')+;
address returns [IPv4Address address]
: IPV4_ADDRESS
{
try {
$address = new IPv4Address($IPV4_ADDRESS.text);
} catch (IllegalArgumentException e) {
???
}
};
I want to report an error at the location of the IPV4_ADDRESS token if
the token is not actually an IPv4 address.
Do I have to throw a special exception to achieve this?
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