Class: Lrama::Grammar::Symbol

Inherits:
Object
  • Object
show all
Defined in:
lib/lrama/grammar/symbol.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id:, term:, alias_name: nil, number: nil, tag: nil, token_id: nil, nullable: nil, precedence: nil, printer: nil, destructor: nil) ⇒ Symbol

Returns a new instance of Symbol.



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# File 'lib/lrama/grammar/symbol.rb', line 33

def initialize(id:, term:, alias_name: nil, number: nil, tag: nil, token_id: nil, nullable: nil, precedence: nil, printer: nil, destructor: nil)
  @id = id
  @alias_name = alias_name
  @number = number
  @tag = tag
  @term = term
  @token_id = token_id
  @nullable = nullable
  @precedence = precedence
  @printer = printer
  @destructor = destructor
end

Instance Attribute Details

#accept_symbol=(value) ⇒ Object (writeonly)

: bool



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# File 'lib/lrama/grammar/symbol.rb', line 29

def accept_symbol=(value)
  @accept_symbol = value
end

#alias_name ⇒ Object

: String?



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# File 'lib/lrama/grammar/symbol.rb', line 13

def alias_name
  @alias_name
end

#destructor ⇒ Object

: Destructor?



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# File 'lib/lrama/grammar/symbol.rb', line 21

def destructor
  @destructor
end

#eof_symbol=(value) ⇒ Object (writeonly)

: bool



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# File 'lib/lrama/grammar/symbol.rb', line 26

def eof_symbol=(value)
  @eof_symbol = value
end

#error_symbol=(value) ⇒ Object (writeonly)

: bool



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# File 'lib/lrama/grammar/symbol.rb', line 27

def error_symbol=(value)
  @error_symbol = value
end

#error_token ⇒ Object

: ErrorToken



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# File 'lib/lrama/grammar/symbol.rb', line 22

def error_token
  @error_token
end

#first_set ⇒ Object

: Set



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# File 'lib/lrama/grammar/symbol.rb', line 23

def first_set
  @first_set
end

#first_set_bitmap ⇒ Object

: Bitmap::bitmap



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# File 'lib/lrama/grammar/symbol.rb', line 24

def first_set_bitmap
  @first_set_bitmap
end

#id ⇒ Object

: Lexer::Token::Base



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# File 'lib/lrama/grammar/symbol.rb', line 12

def id
  @id
end

#nullable ⇒ Object

: bool



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# File 'lib/lrama/grammar/symbol.rb', line 18

def nullable
  @nullable
end

#number ⇒ Object

: Integer



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# File 'lib/lrama/grammar/symbol.rb', line 14

def number
  @number
end

#number_bitmap ⇒ Object

: Bitmap::bitmap



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# File 'lib/lrama/grammar/symbol.rb', line 15

def number_bitmap
  @number_bitmap
end

#precedence ⇒ Object

: Precedence?



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# File 'lib/lrama/grammar/symbol.rb', line 19

def precedence
  @precedence
end

#printer ⇒ Object

: Printer?



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# File 'lib/lrama/grammar/symbol.rb', line 20

def printer
  @printer
end

#tag ⇒ Object

: Lexer::Token::Tag?



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# File 'lib/lrama/grammar/symbol.rb', line 16

def tag
  @tag
end

#term ⇒ Object (readonly)

: bool



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# File 'lib/lrama/grammar/symbol.rb', line 25

def term
  @term
end

#token_id ⇒ Object

: Integer



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# File 'lib/lrama/grammar/symbol.rb', line 17

def token_id
  @token_id
end

#undef_symbol=(value) ⇒ Object (writeonly)

: bool



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# File 'lib/lrama/grammar/symbol.rb', line 28

def undef_symbol=(value)
  @undef_symbol = value
end

Instance Method Details

#accept_symbol? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar/symbol.rb', line 78

def accept_symbol?
  !!@accept_symbol
end

#comment ⇒ Object

comment for yysymbol_kind_t



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# File 'lib/lrama/grammar/symbol.rb', line 128

def comment
  case
  when accept_symbol?
    # YYSYMBOL_YYACCEPT
    name
  when eof_symbol?
    # YYEOF
    alias_name
  when (term? && 0 < token_id && token_id < 128)
    # YYSYMBOL_3_backslash_, YYSYMBOL_14_
    display_name
  when midrule?
    # YYSYMBOL_21_1
    name
  else
    # YYSYMBOL_keyword_class, YYSYMBOL_strings_1
    display_name
  end
end

#display_name ⇒ Object 



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# File 'lib/lrama/grammar/symbol.rb', line 95

def display_name
  alias_name || name
end

#enum_name ⇒ Object

name for yysymbol_kind_t

See: b4_symbol_kind_base



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# File 'lib/lrama/grammar/symbol.rb', line 104

def enum_name
  case
  when accept_symbol?
    res = "YYACCEPT"
  when eof_symbol?
    res = "YYEOF"
  when term? && id.is_a?(Lrama::Lexer::Token::Char)
    res = number.to_s + display_name
  when term? && id.is_a?(Lrama::Lexer::Token::Ident)
    res = name
  when midrule?
    res = number.to_s + name
  when nterm?
    res = name
  else
    raise "Unexpected #{self}"
  end

  "YYSYMBOL_" + res.gsub(/\W+/, "_")
end

#eof_symbol? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar/symbol.rb', line 63

def eof_symbol?
  !!@eof_symbol
end

#error_symbol? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar/symbol.rb', line 68

def error_symbol?
  !!@error_symbol
end

#midrule? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar/symbol.rb', line 83

def midrule?
  return false if term?

  name.include?("$") || name.include?("@")
end

#name ⇒ Object 



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# File 'lib/lrama/grammar/symbol.rb', line 90

def name
  id.s_value
end

#nterm? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar/symbol.rb', line 58

def nterm?
  !term
end

#term? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar/symbol.rb', line 53

def term?
  term
end

#undef_symbol? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar/symbol.rb', line 73

def undef_symbol?
  !!@undef_symbol
end