Class: Racc::Sym
Overview
Stands terminal and nonterminal symbols.
Instance Attribute Summary collapse
-
#assoc ⇒ Object
Returns the value of attribute assoc.
-
#expand ⇒ Object
readonly
Returns the value of attribute expand.
-
#heads ⇒ Object
readonly
cache.
-
#ident ⇒ Object
(also: #hash)
readonly
Returns the value of attribute ident.
-
#locate ⇒ Object
readonly
Returns the value of attribute locate.
-
#precedence ⇒ Object
Returns the value of attribute precedence.
-
#serialized ⇒ Object
writeonly
Sets the attribute serialized.
-
#value ⇒ Object
readonly
Returns the value of attribute value.
Class Method Summary collapse
Instance Method Summary collapse
- #dummy? ⇒ Boolean
-
#initialize(value, dummyp) ⇒ Sym
constructor
A new instance of Sym.
- #nonterminal? ⇒ Boolean
- #null=(n) ⇒ Object
- #nullable? ⇒ Boolean
- #rule ⇒ Object
- #self_null? ⇒ Boolean
- #serialize ⇒ Object
- #should_terminal ⇒ Object
- #should_terminal? ⇒ Boolean
- #string_symbol? ⇒ Boolean
- #term=(t) ⇒ Object
- #terminal? ⇒ Boolean
- #to_s ⇒ Object (also: #inspect)
- #useless=(f) ⇒ Object
- #useless? ⇒ Boolean
- #|(x) ⇒ Object
Constructor Details
#initialize(value, dummyp) ⇒ Sym
Returns a new instance of Sym.
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# File 'lib/racc/grammar.rb', line 972 def initialize(value, dummyp) @ident = nil @value = value @dummyp = dummyp @term = nil @nterm = nil @should_terminal = false @precedence = nil case value when Symbol @to_s = value.to_s @serialized = value.inspect @string = false when String @to_s = value.inspect @serialized = value.dump @string = true when false @to_s = '$end' @serialized = 'false' @string = false when ErrorSymbolValue @to_s = 'error' @serialized = 'Object.new' @string = false else raise ArgumentError, "unknown symbol value: #{value.class}" end @heads = [] @locate = [] @snull = nil @null = nil @expand = nil @useless = nil end |
Instance Attribute Details
#assoc ⇒ Object
Returns the value of attribute assoc.
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# File 'lib/racc/grammar.rb', line 1066 def assoc @assoc end |
#expand ⇒ Object (readonly)
Returns the value of attribute expand.
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# File 'lib/racc/grammar.rb', line 1103 def @expand end |
#heads ⇒ Object (readonly)
cache
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# File 'lib/racc/grammar.rb', line 1086 def heads @heads end |
#ident ⇒ Object (readonly) Also known as: hash
Returns the value of attribute ident.
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# File 'lib/racc/grammar.rb', line 1023 def ident @ident end |
#locate ⇒ Object (readonly)
Returns the value of attribute locate.
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# File 'lib/racc/grammar.rb', line 1087 def locate @locate end |
#precedence ⇒ Object
Returns the value of attribute precedence.
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# File 'lib/racc/grammar.rb', line 1065 def precedence @precedence end |
#serialized=(value) ⇒ Object (writeonly)
Sets the attribute serialized
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# File 'lib/racc/grammar.rb', line 1063 def serialized=(value) @serialized = value end |
#value ⇒ Object (readonly)
Returns the value of attribute value.
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# File 'lib/racc/grammar.rb', line 1027 def value @value end |
Class Method Details
.once_writer(nm) ⇒ Object
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# File 'lib/racc/grammar.rb', line 1011 def once_writer(nm) nm = nm.id2name module_eval(<<-EOS) def #{nm}=(v) raise 'racc: fatal: @#{nm} != nil' unless @#{nm}.nil? @#{nm} = v end EOS end |
Instance Method Details
#dummy? ⇒ Boolean
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# File 'lib/racc/grammar.rb', line 1029 def dummy? @dummyp end |
#nonterminal? ⇒ Boolean
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# File 'lib/racc/grammar.rb', line 1037 def nonterminal? @nterm end |
#null=(n) ⇒ Object
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# File 'lib/racc/grammar.rb', line 1099 def null=(n) @null = n end |
#nullable? ⇒ Boolean
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# File 'lib/racc/grammar.rb', line 1095 def nullable? @null end |
#rule ⇒ Object
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# File 'lib/racc/grammar.rb', line 1078 def rule Rule.new(nil, [self], UserAction.empty) end |
#self_null? ⇒ Boolean
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# File 'lib/racc/grammar.rb', line 1089 def self_null? @snull end |
#serialize ⇒ Object
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# File 'lib/racc/grammar.rb', line 1059 def serialize @serialized end |
#should_terminal ⇒ Object
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# File 'lib/racc/grammar.rb', line 1047 def should_terminal @should_terminal = true end |
#should_terminal? ⇒ Boolean
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# File 'lib/racc/grammar.rb', line 1051 def should_terminal? @should_terminal end |
#string_symbol? ⇒ Boolean
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# File 'lib/racc/grammar.rb', line 1055 def string_symbol? @string end |
#term=(t) ⇒ Object
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# File 'lib/racc/grammar.rb', line 1041 def term=(t) raise 'racc: fatal: term= called twice' unless @term.nil? @term = t @nterm = !t end |
#terminal? ⇒ Boolean
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# File 'lib/racc/grammar.rb', line 1033 def terminal? @term end |
#to_s ⇒ Object Also known as: inspect
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# File 'lib/racc/grammar.rb', line 1068 def to_s @to_s.dup end |
#useless=(f) ⇒ Object
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# File 'lib/racc/grammar.rb', line 1110 def useless=(f) @useless = f end |
#useless? ⇒ Boolean
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# File 'lib/racc/grammar.rb', line 1106 def useless? @useless end |
#|(x) ⇒ Object
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# File 'lib/racc/grammar.rb', line 1074 def |(x) rule() | x.rule end |