yacc trouble

[Mohitz]

Hi Guys,

I am facing a peculiar problem with my yacc script. Following is the
snippet of the yacc script that i am using.
I am using lex as the lexical analyzer.
Sample Input :
create template {
with attributes :
attr1 ;
attr2 ;
attr3 ;
}
tpl_name

Output that i get should be ideally
Attribute name is attr1
Attribute name is attr2
Attribute name is attr3

But what i get is

Attribute name is attr1 ;
Attribute name is attr2 ;
Attribute name is attr3 ;

The semicolon appears at the end. Does someone know why this
happens? Would be glad to furnish more information if needed.
The lex seems to be passing the correct token.

Thanks in advance
Mohit

----------------------------------------------------------------------------------------------------------------------
The Yacc Script Snippet
----------------------------------------------------------------------------------------------------------------------

start : CREATE TEMPLATE '{' create_template _body '}'
IDENTIFIER
{
parsedTemplate =
appendTemplateN ame(strdup($6), $4);
}
;
create_template _body : define_attribut es
{
$$ = createTemplate( $1);
}
;

define_attribut es : WITH ATTRIBUTES ':' attribute_list
{
$$ = $4;
}
;
attribute_list : attribute_list attribute
{
$$ = appendAttribute ($1,$2);
// Append attribute to Attribute List
}
| attribute
{
$$ = createAttribute List($1);
}
;
attribute : IDENTIFIER ';'
{
printf("Attribu te Name is %s\n",
strdup($1));
$$ = createAttribute (strdup($1));
}
---------------------------------------------------------------------------------------------------------------------
The Lex Script Snippet
---------------------------------------------------------------------------------------------------------------------

PS: There are some other tokens here which might not make sense
because i pasted only the relevant parts of the yacc file.

digit [0-9]
letter [a-zA-Z_.]
word {letter}({lette r}|{digit})*
ws [ \n\t]
string \"[^"\n]*["\n]
number {digit}+
%%
"," { showToken(",",y ytext); return ','; }
":" { showToken(":",y ytext); return ':'; }
"{" { showToken("{",y ytext); return '{'; }
"}" { showToken("}",y ytext); return '}'; }
";" { showToken(";",y ytext); return ';'; }
{string} { yylval.str = strdup(yytext+1 );
if (yylval.str[yyleng-2] != '"')
reportError("im properly terminated string");
else {
yylval.str[yyleng-2] = 0;
showToken("STRI NG", yytext);
return STRING;
}
}
{word} {
if (isIdentifier(y ytext) == IDENTIFIER)
{
yylval.str = yytext;
showToken("IDEN TIFIER",yytext) ;
return isIdentifier(yy text);
}
else
{
yylval.str = yytext;
showToken("RESE RVED", yytext);
return isIdentifier(yy text);
}
}
{number} {
yylval.num = atoi(yytext);
showToken("NUMB ER",yytext);
return NUMBER;
}
{ws} ; /* ignore */
{comment} ; /* ignore */
.. {
printf("bad char: '%c'\n", yytext[0]);
showToken("**** **************" ,yytext);
}
%%

[Keith Thompson]

Mohitz <co********@gma il.comwrites:

I am facing a peculiar problem with my yacc script. Following is the
snippet of the yacc script that i am using.
I am using lex as the lexical analyzer.
Sample Input :
create template {
with attributes :
attr1 ;
attr2 ;
attr3 ;
}
tpl_name

Output that i get should be ideally
Attribute name is attr1
Attribute name is attr2
Attribute name is attr3

But what i get is

Attribute name is attr1 ;
Attribute name is attr2 ;
Attribute name is attr3 ;

The semicolon appears at the end. Does someone know why this
happens? Would be glad to furnish more information if needed.
The lex seems to be passing the correct token.

[snip]

This isn't a question about C. You might try comp.compilers.

--
Keith Thompson (The_Other_Keit h) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <* <http://users.sdsc.edu/~kst>
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"

[Mohitz]

ok thanks i will..
On Jun 4, 11:47 am, Keith Thompson <[e-mail] ote:

Mohitz <coolmoh...@gma il.comwrites:

I am facing a peculiar problem with my yacc script. Following is the
snippet of the yacc script that i am using.
I am using lex as the lexical analyzer.

Sample Input :

create template {
with attributes :
attr1 ;
attr2 ;
attr3 ;
}
tpl_name

Output that i get should be ideally

Attribute name is attr1
Attribute name is attr2
Attribute name is attr3

But what i get is

Attribute name is attr1 ;
Attribute name is attr2 ;
Attribute name is attr3 ;

The semicolon appears at the end. Does someone know why this
happens? Would be glad to furnish more information if needed.
The lex seems to be passing the correct token.

[snip]

This isn't a question about C. You might try comp.compilers.

--
Keith Thompson (The_Other_Keit h) [e-mail] <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <* <http://users.sdsc.edu/~kst>
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"- Hide quoted text -

- Show quoted text -