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|
_precSpec:
IDENTIFIER
{
$$(IDENTIFIER);
}
|
QUOTE
{
$$(QUOTE);
}
;
_productionElement:
QUOTE
{
$$ = useTerminal();
}
|
IDENTIFIER
{
$$ = useSymbol();
}
|
BLOCK
{
$$ = d_scanner.block();
}
|
PREC
_precSpec
{
$$ = setPrecedence($2);
}
;
_productionElements:
_productionElements _productionElement
{
$$ = handleProductionElements($1, $2);
// process the first element, return the second
// if the 1st element is a block, handle it as a nested block
}
|
_productionElement
{
$$ = $1;
}
;
_production:
_productionElements
{
handleProductionElement($1);
// process the returned element: if it's a block, it becomes the
// production's action block
}
|
{
// nothing to do for this empty production. But do check for a typed
// nonterminal.
checkEmptyBlocktype();
}
;
_productionSeparator:
'|'
{
d_rules.addProduction(d_scanner.lineNr());
}
;
_productionList:
_productionList _productionSeparator _production
|
_production
;
_ruleName:
identifier
':'
{
openRule($1);
}
;
_rule:
_ruleName
_productionList
';'
{
updateDefaultActionLineNr();
}
;
rules:
rules _rule
|
// empty
;
|
