NAME
MarpaX::ESLIF::Grammar::Symbol::Properties - ESLIF Grammar Symbol Properties
VERSION
version 6.0.16
SYNOPSIS
use MarpaX::ESLIF;
my $eslif = MarpaX::ESLIF->new();
my $data = do { local $/; <DATA> };
my $eslifGrammar = MarpaX::ESLIF::Grammar->new($eslif, $data);
my $symbolProperties = $eslifGrammar->symbolProperties(0);
my $symbolPropertiesByLevel = $eslifGrammar->symbolPropertiesByLevel(0, 0);
__DATA__
#
# This is an example of a calculator grammar
#
:start ::= Expression
:default ::= action => do_op
symbol-action => do_symbol
:desc ::= 'Calculator'
:discard ::= whitespaces event => discard_whitespaces$
: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->getType
Returns the type, c.f. MarpaX::ESLIF::Symbol::Type
$self->isStart
Returns if this is the start symbol
$self->getStart
Returns if this is the start symbol
Alias to isStart()
$self->isDiscard
Returns if this is the discard symbol
$self->getDiscard
Returns if this is the discard symbol
Alias to isDiscard()
$self->isDiscardRhs
Returns if this is a RHS of a discard rule
$self->isDiscardRhs
Returns if this is a RHS of a discard rule
Alias to isDiscardRhs()
$self->isLhs
Returns if this is an LHS
$self->getLhs
Returns if this is an LHS
Alias to isLhs()
$self->isTop
Returns if this is the first symbol of the grammar
$self->getTop
Returns if this is the first symbol of the grammar
Alias to isTop()
$self->getId
Returns the id
$self->getDescription
Returns the description
$self->getEventBefore
Returns the event before name, null if there is none
$self->isEventBeforeInitialState
Returns if the event before initial state is on, meaningless if there is no event before
$self->getEventBeforeInitialState
Returns if the event before initial state is on, meaningless if there is no event before
Alias to isEventBeforeInitialState()
$self->getEventAfter
Returns the event after name, null if there is none
$self->isEventAfterInitialState
Returns if the event after initial state is on, meaningless if there is no event after
$self->getEventAfterInitialState
Returns if the event after initial state is on, meaningless if there is no event after
Alias to isEventAfterInitialState()
$self->getEventPredicted
Returns the event predicted name, null if there is none
$self->isEventPredictedInitialState
Returns if the event predicted initial state is on, meaningless if there is no prediction event
$self->getEventPredictedInitialState
Returns if the event predicted initial state is on, meaningless if there is no prediction event
Alias to isEventPredictedInitialState()
$self->getEventNulled
Returns the null event name, null if there is none - used internally for ":discard[on]" and ":discard[off]" in particular
$self->isEventNulledInitialState
Returns the nulled event initial state, meaningless if there is nulled event
$self->getEventNulledInitialState
Returns the nulled event initial state, meaningless if there is nulled event
Alias isEventNulledInitialState()
$self->getEventCompleted
Returns the completion event name, null if there is none
$self->isEventCompletedInitialState
Returns the completion event initial state, meaningless if there is no completion event
$self->getEventCompletedInitialState
Returns the completion event initial state, meaningless if there is no completion event
Alias to isEventCompletedInitialState()
$self->getDiscardEvent
Returns the discard event, null if there is none
$self->isDiscardEventInitialState
Returns the discard event initial state, meaningless if there is no discard event
$self->isDiscardEventInitialState
Returns the discard event initial state, meaningless if there is no discard event
Alias to isDiscardEventInitialState()
$self->getLookupResolvedLeveli
Returns the grammar level to which it is resolved, can be different to the grammar used when this is a lexeme
$self->getPriority
Returns the symbol priority
$self->getNullableAction
Returns the nullable action, null if there is none
$self->getPropertyBitSet
Returns the low-level properties (combination of MarpaX::ESLIF::Symbol::PropertyBitSet values)
$self->getEventBitSet
Returns the low-level events (combination of MarpaX::ESLIF::Symbol::EventBitSet values)
$self->getSymbolAction
Returns the symbol specific action, null if there is none
$self->getIfAction
Returns the symbol if action, null if there is none
$self->getGeneratorAction
Returns the symbol generator action, null if there is none
$self->isVerbose
Returns if the symbol is verbose
$self->getVerbose
Returns if the symbol is verbose
Alias to isVerbose()
DESCRIPTION
ESLIF Grammar Symbol Properties.
Calls to grammar's currentSymbolProperties() or symbolPropertiesByLevel() methods outputs an instance of this class.
SEE ALSO
MarpaX::ESLIF::Symbol::Type, MarpaX::ESLIF::Symbol::PropertyBitSet, MarpaX::ESLIF::Symbol::EventBitSet
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.