[antlr-interest] error(208)

[Ranco Marcus]

Hello Peter,

You should probably change the name of rule PV to lowercase pv, because it is a parser rule and not a lexer rule. 

Best regards, 

Ranco

________________________________________
From: antlr-interest-bounces at antlr.org [antlr-interest-bounces at antlr.org] on behalf of P.N. [peter.nabbefeld at gmx.de]
Sent: Tuesday, June 07, 2011 10:32 AM
To: antlr-interest at antlr.org
Subject: [antlr-interest] error(208)

Hello!

Using the following rules for grammar (ESC_SEQ defined as fragment):

root    :        object;
object  :       '{' props '}';
props   :       prop (',' prop)*;
prop    :       ID ('=' PV | '+' | '-');
PV      :       STRING | object | INT;
ID      :       ('a'..'z'|'A'..'Z') ('a'..'z'|'A'..'Z'|'0'..'9'|'_')*;
INT     :       '0' | ('1'..'9') ('0'..'9')*;
WS      :       (' '|'\t'|'\r'|'\n') {$channel=HIDDEN;};
STRING  :       '"' (ESC_SEQ | ~('\\'|'"'))* '"';

When I try to generate the Java code, the following error message is shown:
"error(208):  The following token definitions can never be matched
because prior tokens match the same input: INT,STRING"

Why do I get this message, as every lexical rule has its own starting
character?

Kind regards

Peter


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