NAME
MarpaX::ESLIF::Grammar::Rule::Properties - ESLIF Grammar Rule Properties
VERSION
version 6.0.17
SYNOPSIS
use MarpaX::ESLIF;
my $eslif = MarpaX::ESLIF->new();
my $data = do { local $/; <DATA> };
my $eslifGrammar = MarpaX::ESLIF::Grammar->new($eslif, $data);
my $ruleProperties = $eslifGrammar->ruleProperties(0);
my $rulePropertiesByLevel = $eslifGrammar->rulePropertiesByLevel(0, 0);
__DATA__
#
# This is an example of a calculator grammar
#
:start ::= Expression
:default ::= action => do_op
symbol-action => do_symbol
:desc ::= 'Calculator'
:discard ::= whitespaces event => discard_whitespaces$
:discard ::= comment event => discard_comment$
event ^Number = predicted Number
event Number$ = completed Number
Number ::= NUMBER action => ::shift
event Expression$ = completed Expression
event ^Expression = predicted Expression
Expression ::=
Number action => do_int
| '(' Expression ')' assoc => group action => ::copy[1]
|| Expression '**' Expression assoc => right
|| Expression '*' Expression
| Expression '/' Expression
|| Expression '+' Expression
| Expression '-' Expression
whitespaces ::= WHITESPACES
comment ::= /(?:(?:(?:\/\/)(?:[^\n]*)(?:\n|\z))|(?:(?:\/\*)(?:(?:[^\*]+|\*(?!\/))*)(?:\*\/)))/u
:symbol ::= NUMBER pause => before event => ^NUMBER
:symbol ::= NUMBER pause => after event => NUMBER$
:desc ~ 'Calculator Tokens'
NUMBER ~ /[\d]+/ name => 'NUMBER Lexeme'
WHITESPACES ~ [\s]+ name => 'WHITESPACES Lexeme'$self->getId
Returns Rule's id (always >= 0)
$self->getDescription
Returns Rule's description (auto-generated if there is not "name" keyword in the grammar)
$self->getShow
Returns Rule's show
$self->getLhsId
Returns Rule's LHS symbol id (always >= 0)
$self->getSeparatorId
Returns Rule's separator symbol id (< 0 if the rule is not a sequence)
$self->getRhsIds
Returns Rule's RHS ids (none for a null rule or a sequence)
$self->getSkipIndices
Returns Rule's RHS skip indices (none for a null rule)
$self->getExceptionId
Returns Rule's exception id (< 0 if there is no exception)
$self->getAction
Returns Rule's action (null if none)
$self->getDiscardEvent
Returns Rule's discard event name (only when LHS is ":discard" and "event" keyword is present)
$self->isDiscardEventInitialState
Returns Rule's discard initial state is on ?
$self->getDiscardEventInitialState
Returns Rule's discard initial state is on ?
Alias to isDiscardEventInitialState()
$self->getRank
Returns Rule's rank (defaults to 0)
$self->isNullRanksHigh
Returns Rule rank high when it is a nullable ?
$self->getNullRanksHigh
Returns Rule rank high when it is a nullable ?
Alias to isNullRanksHigh()
$self->isSequence
Returns Rule is a sequence ?
$self->getSequence
Returns Rule is a sequence ?
Alias to isSequence()
$self->isProper
Returns Rule's separation is proper ? (meaningful only when it is sequence)
$self->getProper
Returns Rule's separation is proper ? (meaningful only when it is sequence)
Alias to isProper()
$self->getMinimum
Returns Rule's minimum number of RHS (meaningful only when rule is a sequence)
$self->getPropertyBitSet
Returns Rule's low-level property bits (combination of MarpaX::ESLIF::Grammar::Rule::PropertyBitSet values)
$self->isHideseparator
Returns Hide separator in action callback ? (meaningful only when rule is a sequence)
$self->getHideseparator
Returns Hide separator in action callback ? (meaningful only when rule is a sequence)
Alias to isHideseparator()
DESCRIPTION
ESLIF Grammar Rule Properties.
Calls to grammar's currentRuleProperties() or rulePropertiesByLevel() methods outputs an instance of this class.
SEE ALSO
MarpaX::ESLIF::Rule::PropertyBitSet
1;
AUTHOR
Jean-Damien Durand <jeandamiendurand@free.fr>
COPYRIGHT AND LICENSE
This software is copyright (c) 2017 by Jean-Damien Durand.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.