class Racc::Rule
Attributes
action[R]
hash[R]
ident[RW]
ptrs[R]
specified_prec[RW]
symbols[R]
target[RW]
Public Class Methods
new(target, syms, act)
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# File racc-1.7.3/lib/racc/grammar.rb, line 608 def initialize(target, syms, act) @target = target @symbols = syms @action = act @alternatives = [] @ident = nil @hash = nil @ptrs = nil @precedence = nil @specified_prec = nil @null = nil @useless = nil end
Public Instance Methods
==(other)
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# File racc-1.7.3/lib/racc/grammar.rb, line 687 def ==(other) other.kind_of?(Rule) and @ident == other.ident end
[](idx)
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# File racc-1.7.3/lib/racc/grammar.rb, line 691 def [](idx) @symbols[idx] end
accept?()
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# File racc-1.7.3/lib/racc/grammar.rb, line 707 def accept? if tok = @symbols[-1] tok.anchor? else false end end
each(&block)
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# File racc-1.7.3/lib/racc/grammar.rb, line 715 def each(&block) @symbols.each(&block) end
each_rule() { |self| ... }
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# File racc-1.7.3/lib/racc/grammar.rb, line 636 def each_rule(&block) yield self @alternatives.each(&block) end
empty?()
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# File racc-1.7.3/lib/racc/grammar.rb, line 699 def empty? @symbols.empty? end
hash=(n)
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# File racc-1.7.3/lib/racc/grammar.rb, line 646 def hash=(n) @hash = n ptrs = [] @symbols.each_with_index do |sym, idx| ptrs.push LocationPointer.new(self, idx, sym) end ptrs.push LocationPointer.new(self, @symbols.size, nil) @ptrs = ptrs end
inspect()
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# File racc-1.7.3/lib/racc/grammar.rb, line 683 def inspect "#<Racc::Rule id=#{@ident} (#{@target})>" end
null=(n)
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# File racc-1.7.3/lib/racc/grammar.rb, line 678 def null=(n) @null = n end
nullable?()
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# File racc-1.7.3/lib/racc/grammar.rb, line 677 def nullable?() @null end
prec(sym, &block)
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# File racc-1.7.3/lib/racc/grammar.rb, line 664 def prec(sym, &block) @specified_prec = sym if block unless @action.empty? raise CompileError, 'both of rule action block and prec block given' end @action = UserAction.proc(block) end self end
precedence()
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# File racc-1.7.3/lib/racc/grammar.rb, line 656 def precedence @specified_prec || @precedence end
precedence=(sym)
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# File racc-1.7.3/lib/racc/grammar.rb, line 660 def precedence=(sym) @precedence ||= sym end
replace(src, dest)
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# File racc-1.7.3/lib/racc/grammar.rb, line 719 def replace(src, dest) @target = dest @symbols = @symbols.map {|s| s == src ? dest : s } end
rule()
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# File racc-1.7.3/lib/racc/grammar.rb, line 632 def rule self end
size()
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# File racc-1.7.3/lib/racc/grammar.rb, line 695 def size @symbols.size end
to_s()
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# File racc-1.7.3/lib/racc/grammar.rb, line 703 def to_s "#<rule#{@ident}>" end
useless=(u)
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# File racc-1.7.3/lib/racc/grammar.rb, line 681 def useless=(u) @useless = u end
useless?()
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# File racc-1.7.3/lib/racc/grammar.rb, line 680 def useless?() @useless end
|(x)
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# File racc-1.7.3/lib/racc/grammar.rb, line 627 def |(x) @alternatives.push x.rule self end