Class: Lrama::Symbol

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

Overview

Symbol is both of nterm and term ‘number` is both for nterm and term `token_id` is tokentype for term, internal sequence number for nterm

TODO: Add validation for ASCII code range for Token::Char

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#accept_symbol=(value) ⇒ Object (writeonly)

Sets the attribute accept_symbol

Parameters:

  • value —

    the value to set the attribute accept_symbol to.



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# File 'lib/lrama/grammar.rb', line 45

def accept_symbol=(value)
  @accept_symbol = value
end

#alias_name ⇒ Object

Returns the value of attribute alias_name

Returns:

  • (Object) —

    the current value of alias_name



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# File 'lib/lrama/grammar.rb', line 44

def alias_name
  @alias_name
end

#eof_symbol=(value) ⇒ Object (writeonly)

Sets the attribute eof_symbol

Parameters:

  • value —

    the value to set the attribute eof_symbol to.



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# File 'lib/lrama/grammar.rb', line 45

def eof_symbol=(value)
  @eof_symbol = value
end

#error_symbol=(value) ⇒ Object (writeonly)

Sets the attribute error_symbol

Parameters:

  • value —

    the value to set the attribute error_symbol to.



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# File 'lib/lrama/grammar.rb', line 45

def error_symbol=(value)
  @error_symbol = value
end

#id ⇒ Object

Returns the value of attribute id

Returns:

  • (Object) —

    the current value of id



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# File 'lib/lrama/grammar.rb', line 44

def id
  @id
end

#nullable ⇒ Object

Returns the value of attribute nullable

Returns:

  • (Object) —

    the current value of nullable



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# File 'lib/lrama/grammar.rb', line 44

def nullable
  @nullable
end

#number ⇒ Object

Returns the value of attribute number

Returns:

  • (Object) —

    the current value of number



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# File 'lib/lrama/grammar.rb', line 44

def number
  @number
end

#precedence ⇒ Object

Returns the value of attribute precedence

Returns:

  • (Object) —

    the current value of precedence



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# File 'lib/lrama/grammar.rb', line 44

def precedence
  @precedence
end

#printer ⇒ Object

Returns the value of attribute printer

Returns:

  • (Object) —

    the current value of printer



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# File 'lib/lrama/grammar.rb', line 44

def printer
  @printer
end

#tag ⇒ Object

Returns the value of attribute tag

Returns:

  • (Object) —

    the current value of tag



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# File 'lib/lrama/grammar.rb', line 44

def tag
  @tag
end

#term ⇒ Object

Returns the value of attribute term

Returns:

  • (Object) —

    the current value of term



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# File 'lib/lrama/grammar.rb', line 44

def term
  @term
end

#token_id ⇒ Object

Returns the value of attribute token_id

Returns:

  • (Object) —

    the current value of token_id



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# File 'lib/lrama/grammar.rb', line 44

def token_id
  @token_id
end

#undef_symbol=(value) ⇒ Object (writeonly)

Sets the attribute undef_symbol

Parameters:

  • value —

    the value to set the attribute undef_symbol to.



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# File 'lib/lrama/grammar.rb', line 45

def undef_symbol=(value)
  @undef_symbol = value
end

Instance Method Details

#accept_symbol? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar.rb', line 67

def accept_symbol?
  !!@accept_symbol
end

#comment ⇒ Object

comment for yysymbol_kind_t



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# File 'lib/lrama/grammar.rb', line 108

def comment
  case
  when accept_symbol?
    # YYSYMBOL_YYACCEPT
    id.s_value
  when eof_symbol?
    # YYEOF
    alias_name
  when (term? && 0 < token_id && token_id < 128)
    # YYSYMBOL_3_backslash_, YYSYMBOL_14_
    alias_name || id.s_value
  when id.s_value.include?("$") || id.s_value.include?("@")
    # YYSYMBOL_21_1
    id.s_value
  else
    # YYSYMBOL_keyword_class, YYSYMBOL_strings_1
    alias_name || id.s_value
  end
end

#display_name ⇒ Object 



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# File 'lib/lrama/grammar.rb', line 71

def display_name
  if alias_name
    alias_name
  else
    id.s_value
  end
end

#enum_name ⇒ Object

name for yysymbol_kind_t

See: b4_symbol_kind_base



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# File 'lib/lrama/grammar.rb', line 82

def enum_name
  case
  when accept_symbol?
    name = "YYACCEPT"
  when eof_symbol?
    name = "YYEOF"
  when term? && id.type == Token::Char
    if alias_name
      name = number.to_s + alias_name
    else
      name = number.to_s + id.s_value
    end
  when term? && id.type == Token::Ident
    name = id.s_value
  when nterm? && (id.s_value.include?("$") || id.s_value.include?("@"))
    name = number.to_s + id.s_value
  when nterm?
    name = id.s_value
  else
    raise "Unexpected #{self}"
  end

  "YYSYMBOL_" + name.gsub(/[^a-zA-Z_0-9]+/, "_")
end

#eof_symbol? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar.rb', line 55

def eof_symbol?
  !!@eof_symbol
end

#error_symbol? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar.rb', line 59

def error_symbol?
  !!@error_symbol
end

#nterm? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar.rb', line 51

def nterm?
  !term
end

#term? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/lrama/grammar.rb', line 47

def term?
  term
end

#undef_symbol? ⇒ Boolean

Returns:

  • (Boolean) 


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

def undef_symbol?
  !!@undef_symbol
end