Hi, Ron
I'm fine, many responsability, working with xHarbour.
Adding debug to parser I have this sequence:
*** New Macro: >>>(file_alias = $1)<<< Len: 17
Starting parse
Entering state 0
Reading a token:
Reducing Delimiter: '(' As: 40
Passing through: 40
Returning: 40
Next token is token '(' ()
Shifting token '(' ()
Entering state 23
Reading a token:
Checking 4 Streams for E At: >e_alias = $1)<
Token: "FILE_ALIAS" Ommited: ' '
Pre-Scaning Words for Token: FILE_ALIAS at Positions: 1-1
iLenMatch 10
iKeyLen: 5 iLen2Match: 10 comparing: [FILE_ALIAS] with: [FIELD?WS?->]
Trying Next Word Pattern... [FILE_ALIAS] > [FIELD?WS?->]
Continue with: [HAS]
Reducing Element: "FILE_ALIAS"
Element "FILE_ALIAS" is 258
Passing through: 258
Returning: 258
Next token is token IDENTIFIER ()
Shifting token IDENTIFIER ()
Entering state 86
Reducing stack by rule 8 (line 379):
$1 = token IDENTIFIER ()
-> $$ = nterm IdentName ()
Stack now 0 23
Entering state 26
Reading a token:
Checking 28 Selfs for = At: >= $1)<
Reducing Delimiter: '=' As: 1085
Returning Dont Reduce 61
Returning: 61
Next token is token '=' ()
Reducing stack by rule 30 (line 533):
$1 = nterm IdentName ()
-> $$ = nterm Variable ()
Stack now 0 23
Entering state 38
Next token is token '=' ()
Reducing stack by rule 109 (line 820):
$1 = nterm Variable ()
-> $$ = nterm SimpleExpression ()
Stack now 0 23
Entering state 57
Reducing stack by rule 126 (line 839):
$1 = nterm SimpleExpression ()
-> $$ = nterm Expression ()
Stack now 0 23
Entering state 106
Next token is token '=' ()
Shifting token '=' ()
Entering state 197
Reading a token:
Reducing Delimiter: '$' As: 1060
Returning Dont Reduce 36
Returning: 36
Next token is token '$' ()
Error: popping token '=' ()
Stack now 0 23 106
Error: popping nterm Expression ()
Stack now 0 23
Error: popping token '(' ()
Stack now 0
Shifting token error ()
Entering state 1
Reducing stack by rule 7 (line 359):
$1 = token error ()
Cleanup: discarding lookahead token '$' ()
Stack now 0
source\vm\fm.c:971: HB_TR_ERROR Block 1 00923AA8 (size 11) MAIN(10),
"FILE_ALIAS."
source\vm\fm.c:971: HB_TR_ERROR Block 2 00A5A2D0 (size 40) MAIN(10),
"A83A92000000000010D6E80000000000010002008000000000000000010000001A00000000000000"
Testing several expression to force error and reduce stack by rule 7, i
found that other expression free memory using s_Pending.
If code is:
file_alias = $1
the stack is reduced by rule 6
I test adding a rule
| '(' Expression error
similar to
| Expression error
and the parser reduce in this rule instead of rule
| error
and now no more memory leaks, but is this a correct solution?
Thank you
*Walter Negro*
Desarrollo e Investigación
VsTour - Softmagic S.R.L.
( 54 ) ( 11 ) 5218-6616
Av. Corrientes 2294 Piso 7 Of.33
C1046AAN - Buenos Aires - Argentina
wne...@vstour.com
--------------------------------------------------------------------------------
*:: VSTour.COM <http://www.vstour.com> :: *
2016-04-19 16:53 GMT-03:00 Ron Pinkas <ron.pin...@xharbour.com>:
> Hey Walter, :-)
>
> (How are you?)
>
> How much memory, and what is stored int it?
>
> We need to follow the EXPRESSION TREE, and find which element is not
> released.
>
> It should be a Parenthesized Exp, which has a single element, being an
> EQUATION where the left side is the IDENTIFIER file_alias, and the right
> side is where the syntax error occurs as $ was encountered.
>
> We must be sure that the pending expression (the Parenthesis ) is released
> as well as the expression of the current token (the $ operator).
>
> Ron
>
> > On Apr 7, 2016, at 12:35 AM, Walter Negro <wne...@vstour.com> wrote:
> >
> >
> > Procedure Main()
> >
> > TRY
> > // ? &( "file_alias = $1" ) // No memory leaks
> > ? &( "(file_alias = $1)" ) // Memory leaks
> > CATCH
> > ? "Catched"
> > END
> >
> > Return
> >
> > ---------------------------
> > This code
> > &( "file_alias = $1" )
> >
> > End in the rule (macro.y)
> > Main : Expression error
> >
> > ---------------------------
> > This code
> > &( "(file_alias = $1)" )
> >
> > End in the rule (macro.y)
> > Main : error
> >
> > I not understand how to fix the rule or
> >
> > Walter Negro
> >
> >
> >
> ------------------------------------------------------------------------------
> > _______________________________________________
> > xHarbour-developers mailing list
> > xHarbour-developers@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/xharbour-developers
>
>
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