Class: Antlr4::Runtime::VocabularyImpl
- Inherits:
-
Vocabulary
- Object
- Vocabulary
- Antlr4::Runtime::VocabularyImpl
- Defined in:
- lib/antlr4/runtime/vocabulary_impl.rb
Constant Summary collapse
- EMPTY_VOCABULARY =
VocabularyImpl.new(@@empty_names, @@empty_names, @@empty_names)
- @@empty_names =
[]
Class Method Summary collapse
Instance Method Summary collapse
- #display_name(token_type) ⇒ Object
-
#initialize(literal_names, symbolic_names, display_names = nil) ⇒ VocabularyImpl
constructor
A new instance of VocabularyImpl.
- #literal_name(token_type) ⇒ Object
- #symbolic_name(token_type) ⇒ Object
Methods inherited from Vocabulary
Constructor Details
#initialize(literal_names, symbolic_names, display_names = nil) ⇒ VocabularyImpl
Returns a new instance of VocabularyImpl.
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# File 'lib/antlr4/runtime/vocabulary_impl.rb', line 6 def initialize(literal_names, symbolic_names, display_names = nil) @literal_names = !literal_names.nil? ? literal_names : @@empty_names @symbolic_names = !symbolic_names.nil? ? symbolic_names : @@empty_names @display_names = !display_names.nil? ? display_names : @@empty_names # See note here on -1 part: https:#github.com/antlr/antlr4/pull/1146 @max_token_type = [@display_names.length, @literal_names.length, @symbolic_names.length].max - 1 end |
Class Method Details
.from_token_names(token_names) ⇒ Object
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# File 'lib/antlr4/runtime/vocabulary_impl.rb', line 16 def self.from_token_names(token_names) return EMPTY_VOCABULARY if token_names.nil? || token_names.empty? @literal_names = Array.new(token_names) @symbolic_names = Array.new(token_names) i = 0 while i < token_names.length token_name = token_names[i] if token_name.nil? i += 1 next end unless token_name.empty? first_char = token_name[0] if first_char == '\'' @symbolic_names[i] = nil i += 1 next end end # wasn't a literal or symbolic name @literal_names[i] = nil @symbolic_names[i] = nil i += 1 end VocabularyImpl.new(@literal_names, @symbolic_names, token_names) end |
Instance Method Details
#display_name(token_type) ⇒ Object
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# File 'lib/antlr4/runtime/vocabulary_impl.rb', line 65 def display_name(token_type) if token_type >= 0 && token_type < @display_names.length disp_name = @display_names[token_type] return disp_name unless disp_name.nil? end lit_name = literal_name(token_type) return lit_name unless lit_name.nil? sym_name = symbolic_name(token_type) return sym_name unless sym_name.nil? Integer.to_s(token_type) end |
#literal_name(token_type) ⇒ Object
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# File 'lib/antlr4/runtime/vocabulary_impl.rb', line 47 def literal_name(token_type) if token_type >= 0 && token_type < @literal_names.length return @literal_names[token_type] end nil end |
#symbolic_name(token_type) ⇒ Object
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# File 'lib/antlr4/runtime/vocabulary_impl.rb', line 55 def symbolic_name(token_type) if token_type >= 0 && token_type < @symbolic_names.length return @symbolic_names[token_type] end return 'EOF' if token_type == Token::EOF token_type.to_s end |