Hi Everyone,
This is the first time I use sableCC, but is failing on me with something
basic.
It has to be me!! :)
I am using sablecc 3.2
Please see the two examples below. One works, the other one doesn't
The input in both cases is a string equal to "45" (without the quotes).
is really that simple, just two chars. And the grammar file has two token
definitions and only one production.
Good: The method parseFileA() works as expected, as it prints
[java] ...starting..
[java] [45 ]
[java] no more tokens
Bad: The method parseFileB() throws this Exception:
[java] org.sablecc.sablecc.parser.ParserException: [1,1] expecting: EOF
[java] at org.sablecc.sablecc.parser.Parser.parse(Parser.java:1792)
[java] at
com.cariden.parseconfig.GrammarOne.parseFileB(GrammarOne.java:61)
The portion in Parser.java that throws the exception is this one:
case ERROR:
throw new ParserException(last_token,
"[" + last_line + "," + last_pos + "] " +
errorMessages[errors[action[1]]]);
Please, please help me !!. I really want to use this tool !!
Claudio
*
grammar
**--------------------------------------**
--------------------------------------*
Package com.cariden.parseconfig.generated.AluGrammar;
Tokens
number = ['0' .. '9']+;
blank = (' ' | 13 | 10)+;
Ignored Tokens
blank;
Productions
term = {number} number;
*java code
**--------------------------------------**
--------------------------------------*
* // this example works*
public static void parseFileA( File aInFile )
{
try
{
Reader lReader = new FileReader( aInFile );
Lexer lexer = new Lexer( new PushbackReader( lReader ) );
System.out.println( "starting.." );
while ( true )
{
org.sablecc.sablecc.node.Token next = lexer.peek();
if ( next instanceof org.sablecc.sablecc.node.EOF )
{
System.out.println( "no more tokens" );
break;
}
else
{
next = lexer.next();
System.out.println( "[" + next.toString() + "]" );
}
}
}
catch ( Throwable t )
{
t.printStackTrace();
}
}
* // this example gives an unexpected exception inside call to p.parse()
*
public static void parseFileB( File aInFile )
{
try
{
Reader lReader = new FileReader( aInFile );
Lexer lexer = new Lexer( new PushbackReader( lReader ) );
Parser p = new Parser( lexer );
Start tree = p.parse();
}
catch ( Throwable t )
{
t.printStackTrace();
}
}
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