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Added a comment into the OQL grammar, about operators precedence and a ref to some helpful doc

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SVN:code[14]
This commit is contained in:
Romain Quetiez
2009-03-27 15:20:44 +00:00
parent f8d15a2281
commit 46a30773ea
2 changed files with 382 additions and 362 deletions
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265
core/oql/oql-parser.php
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@@ -96,7 +96,7 @@ class OQLParser_yyStackEntry
// code external to the class is included here
// declare_class is output here
#line 2 "oql-parser.y"
#line 24 "oql-parser.y"
class OQLParserRaw#line 102 "oql-parser.php"
{
/* First off, code is included which follows the "include_class" declaration
@@ -1221,118 +1221,118 @@ static public $yy_action = array(
** function yy_r0($yymsp){ ... } // User supplied code
** #line <lineno> <thisfile>
*/
#line 7 "oql-parser.y"
#line 29 "oql-parser.y"
function yy_r0(){ $this->my_result = $this->yystack[$this->yyidx + 0]->minor; }
#line 1230 "oql-parser.php"
#line 10 "oql-parser.y"
function yy_r2(){
$this->_retvalue = new OqlQuery($this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + 0]->minor, $this->yystack[$this->yyidx + -1]->minor);
#line 32 "oql-parser.y"
function yy_r2(){
$this->_retvalue = new OqlQuery($this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + 0]->minor, $this->yystack[$this->yyidx + -1]->minor);
}
#line 1235 "oql-parser.php"
#line 13 "oql-parser.y"
function yy_r3(){
$this->_retvalue = new OqlQuery($this->yystack[$this->yyidx + -4]->minor, $this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + 0]->minor, $this->yystack[$this->yyidx + -1]->minor);
#line 35 "oql-parser.y"
function yy_r3(){
$this->_retvalue = new OqlQuery($this->yystack[$this->yyidx + -4]->minor, $this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + 0]->minor, $this->yystack[$this->yyidx + -1]->minor);
}
#line 1240 "oql-parser.php"
#line 17 "oql-parser.y"
#line 39 "oql-parser.y"
function yy_r4(){ $this->_retvalue = $this->yystack[$this->yyidx + 0]->minor; }
#line 1243 "oql-parser.php"
#line 18 "oql-parser.y"
#line 40 "oql-parser.y"
function yy_r5(){ $this->_retvalue = null; }
#line 1246 "oql-parser.php"
#line 20 "oql-parser.y"
function yy_r6(){
// insert the join statement on top of the existing list
array_unshift($this->yystack[$this->yyidx + 0]->minor, $this->yystack[$this->yyidx + -1]->minor);
// and return the updated array
$this->_retvalue = $this->yystack[$this->yyidx + 0]->minor;
#line 42 "oql-parser.y"
function yy_r6(){
// insert the join statement on top of the existing list
array_unshift($this->yystack[$this->yyidx + 0]->minor, $this->yystack[$this->yyidx + -1]->minor);
// and return the updated array
$this->_retvalue = $this->yystack[$this->yyidx + 0]->minor;
}
#line 1254 "oql-parser.php"
#line 26 "oql-parser.y"
function yy_r7(){
$this->_retvalue = Array($this->yystack[$this->yyidx + 0]->minor);
#line 48 "oql-parser.y"
function yy_r7(){
$this->_retvalue = Array($this->yystack[$this->yyidx + 0]->minor);
}
#line 1259 "oql-parser.php"
#line 32 "oql-parser.y"
function yy_r9(){
// create an array with one single item
$this->_retvalue = new OqlJoinSpec($this->yystack[$this->yyidx + -4]->minor, $this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + 0]->minor);
#line 54 "oql-parser.y"
function yy_r9(){
// create an array with one single item
$this->_retvalue = new OqlJoinSpec($this->yystack[$this->yyidx + -4]->minor, $this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + 0]->minor);
}
#line 1265 "oql-parser.php"
#line 37 "oql-parser.y"
function yy_r10(){
// create an array with one single item
$this->_retvalue = new OqlJoinSpec($this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + 0]->minor);
#line 59 "oql-parser.y"
function yy_r10(){
// create an array with one single item
$this->_retvalue = new OqlJoinSpec($this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + 0]->minor);
}
#line 1271 "oql-parser.php"
#line 42 "oql-parser.y"
#line 64 "oql-parser.y"
function yy_r11(){ $this->_retvalue = new BinaryOqlExpression($this->yystack[$this->yyidx + -2]->minor, '=', $this->yystack[$this->yyidx + 0]->minor); }
#line 1274 "oql-parser.php"
#line 44 "oql-parser.y"
#line 66 "oql-parser.y"
function yy_r12(){ $this->_retvalue = $this->yystack[$this->yyidx + 0]->minor; }
#line 1277 "oql-parser.php"
#line 48 "oql-parser.y"
#line 70 "oql-parser.y"
function yy_r15(){ $this->_retvalue = new FunctionOqlExpression($this->yystack[$this->yyidx + -3]->minor, $this->yystack[$this->yyidx + -1]->minor); }
#line 1280 "oql-parser.php"
#line 49 "oql-parser.y"
#line 71 "oql-parser.y"
function yy_r16(){ $this->_retvalue = $this->yystack[$this->yyidx + -1]->minor; }
#line 1283 "oql-parser.php"
#line 50 "oql-parser.y"
#line 72 "oql-parser.y"
function yy_r17(){ $this->_retvalue = new BinaryOqlExpression($this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + -1]->minor, $this->yystack[$this->yyidx + 0]->minor); }
#line 1286 "oql-parser.php"
#line 65 "oql-parser.y"
function yy_r26(){
$this->_retvalue = new ListOqlExpression($this->yystack[$this->yyidx + -1]->minor);
#line 87 "oql-parser.y"
function yy_r26(){
$this->_retvalue = new ListOqlExpression($this->yystack[$this->yyidx + -1]->minor);
}
#line 1291 "oql-parser.php"
#line 68 "oql-parser.y"
function yy_r27(){
$this->_retvalue = array($this->yystack[$this->yyidx + 0]->minor);
#line 90 "oql-parser.y"
function yy_r27(){
$this->_retvalue = array($this->yystack[$this->yyidx + 0]->minor);
}
#line 1296 "oql-parser.php"
#line 71 "oql-parser.y"
function yy_r28(){
array_push($this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + 0]->minor);
$this->_retvalue = $this->yystack[$this->yyidx + -2]->minor;
#line 93 "oql-parser.y"
function yy_r28(){
array_push($this->yystack[$this->yyidx + -2]->minor, $this->yystack[$this->yyidx + 0]->minor);
$this->_retvalue = $this->yystack[$this->yyidx + -2]->minor;
}
#line 1302 "oql-parser.php"
#line 76 "oql-parser.y"
function yy_r29(){
$this->_retvalue = array();
#line 98 "oql-parser.y"
function yy_r29(){
$this->_retvalue = array();
}
#line 1307 "oql-parser.php"
#line 87 "oql-parser.y"
#line 109 "oql-parser.y"
function yy_r33(){ $this->_retvalue = new IntervalOqlExpression($this->yystack[$this->yyidx + -1]->minor, $this->yystack[$this->yyidx + 0]->minor); }
#line 1310 "oql-parser.php"
#line 96 "oql-parser.y"
#line 118 "oql-parser.y"
function yy_r39(){ $this->_retvalue = new ScalarOqlExpression($this->yystack[$this->yyidx + 0]->minor); }
#line 1313 "oql-parser.php"
#line 99 "oql-parser.y"
#line 121 "oql-parser.y"
function yy_r41(){ $this->_retvalue = new FieldOqlExpression($this->yystack[$this->yyidx + 0]->minor); }
#line 1316 "oql-parser.php"
#line 100 "oql-parser.y"
#line 122 "oql-parser.y"
function yy_r42(){ $this->_retvalue = new FieldOqlExpression($this->yystack[$this->yyidx + 0]->minor, $this->yystack[$this->yyidx + -2]->minor); }
#line 1319 "oql-parser.php"
#line 101 "oql-parser.y"
#line 123 "oql-parser.y"
function yy_r43(){ $this->_retvalue=$this->yystack[$this->yyidx + 0]->minor; }
#line 1322 "oql-parser.php"
#line 103 "oql-parser.y"
function yy_r44(){
if ($this->yystack[$this->yyidx + 0]->minor[0] == '`')
{
$name = substr($this->yystack[$this->yyidx + 0]->minor, 1, strlen($this->yystack[$this->yyidx + 0]->minor) - 2);
}
else
{
$name = $this->yystack[$this->yyidx + 0]->minor;
}
$this->_retvalue = new OqlName($name, $this->m_iColPrev);
#line 125 "oql-parser.y"
function yy_r44(){
if ($this->yystack[$this->yyidx + 0]->minor[0] == '`')
{
$name = substr($this->yystack[$this->yyidx + 0]->minor, 1, strlen($this->yystack[$this->yyidx + 0]->minor) - 2);
}
else
{
$name = $this->yystack[$this->yyidx + 0]->minor;
}
$this->_retvalue = new OqlName($name, $this->m_iColPrev);
}
#line 1335 "oql-parser.php"
#line 115 "oql-parser.y"
#line 137 "oql-parser.y"
function yy_r45(){$this->_retvalue=$this->yystack[$this->yyidx + 0]->minor; }
#line 1338 "oql-parser.php"
#line 116 "oql-parser.y"
#line 138 "oql-parser.y"
function yy_r46(){$this->_retvalue=stripslashes(substr($this->yystack[$this->yyidx + 0]->minor, 1, strlen($this->yystack[$this->yyidx + 0]->minor) - 2)); }
#line 1341 "oql-parser.php"
@@ -1446,9 +1446,9 @@ static public $yy_action = array(
*/
function yy_syntax_error($yymajor, $TOKEN)
{
#line 3 "oql-parser.y"
throw new OQLParserException($this->m_sSourceQuery, $this->m_iLine, $this->m_iCol, $this->tokenName($yymajor), $TOKEN);
#line 25 "oql-parser.y"
throw new OQLParserException($this->m_sSourceQuery, $this->m_iLine, $this->m_iCol, $this->tokenName($yymajor), $TOKEN);
#line 1457 "oql-parser.php"
}
@@ -1601,70 +1601,69 @@ throw new OQLParserException($this->m_sSourceQuery, $this->m_iLine, $this->m_iCo
}
} while ($yymajor != self::YYNOCODE && $this->yyidx >= 0);
}
}#line 164 "oql-parser.y"
class OQLParserException extends OQLException
{
public function __construct($sInput, $iLine, $iCol, $sTokenName, $sTokenValue)
{
$sIssue = "Unexpected token $sTokenName";
parent::__construct($sIssue, $sInput, $iLine, $iCol, $sTokenValue);
}
}
class OQLParser extends OQLParserRaw
{
// dirty, but working for us (no other mean to get the final result :-(
protected $my_result;
public function GetResult()
{
return $this->my_result;
}
// More info on the source query and the current position while parsing it
// Data used when an exception is raised
protected $m_iLine; // still not used
protected $m_iCol;
protected $m_iColPrev; // this is the interesting one, because the parser will reduce on the next token
protected $m_sSourceQuery;
public function __construct($sQuery)
{
$this->m_iLine = 0;
$this->m_iCol = 0;
$this->m_iColPrev = 0;
$this->m_sSourceQuery = $sQuery;
// no constructor - parent::__construct();
}
public function doParse($token, $value, $iCurrPosition = 0)
{
$this->m_iColPrev = $this->m_iCol;
$this->m_iCol = $iCurrPosition;
return parent::DoParse($token, $value);
}
public function doFinish()
{
$this->doParse(0, 0);
return $this->my_result;
}
public function __destruct()
{
// Bug in the original destructor, causing an infinite loop !
// This is a real issue when a fatal error occurs on the first token (the error could not be seen)
if (is_null($this->yyidx))
{
$this->yyidx = -1;
}
parent::__destruct();
}
}
#line 1677 "oql-parser.php"
}#line 186 "oql-parser.y"
class OQLParserException extends OQLException
{
public function __construct($sInput, $iLine, $iCol, $sTokenName, $sTokenValue)
{
$sIssue = "Unexpected token $sTokenName";
parent::__construct($sIssue, $sInput, $iLine, $iCol, $sTokenValue);
}
}
class OQLParser extends OQLParserRaw
{
// dirty, but working for us (no other mean to get the final result :-(
protected $my_result;
public function GetResult()
{
return $this->my_result;
}
// More info on the source query and the current position while parsing it
// Data used when an exception is raised
protected $m_iLine; // still not used
protected $m_iCol;
protected $m_iColPrev; // this is the interesting one, because the parser will reduce on the next token
protected $m_sSourceQuery;
public function __construct($sQuery)
{
$this->m_iLine = 0;
$this->m_iCol = 0;
$this->m_iColPrev = 0;
$this->m_sSourceQuery = $sQuery;
// no constructor - parent::__construct();
}
public function doParse($token, $value, $iCurrPosition = 0)
{
$this->m_iColPrev = $this->m_iCol;
$this->m_iCol = $iCurrPosition;
return parent::DoParse($token, $value);
}
public function doFinish()
{
$this->doParse(0, 0);
return $this->my_result;
}
public function __destruct()
{
// Bug in the original destructor, causing an infinite loop !
// This is a real issue when a fatal error occurs on the first token (the error could not be seen)
if (is_null($this->yyidx))
{
$this->yyidx = -1;
}
parent::__destruct();
}
}
#line 1676 "oql-parser.php"