Class: TokenString::Impl

Inherits:
Object
  • Object
show all
Defined in:
lib/token_string.rb

Overview

The value type that implements the whole shebang.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(format, tokens) ⇒ Impl

:nodoc:



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# File 'lib/token_string.rb', line 84

def initialize( format, tokens)
  # this should be called only from TokenString.from & TokenString.make
  @format, @tokens = format, tokens
end

Instance Attribute Details

#format ⇒ Object (readonly)

Returns the value of attribute format.



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# File 'lib/token_string.rb', line 81

def format
  @format
end

#tokens ⇒ Object (readonly)

Returns the value of attribute tokens.



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# File 'lib/token_string.rb', line 81

def tokens
  @tokens
end

Instance Method Details

#==(other) ⇒ Object

Two such strings should be equal independent of the representation



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# File 'lib/token_string.rb', line 111

def ==(other)
  return false unless other
  other.tokens == tokens
end

#clone ⇒ Object

Clones



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# File 'lib/token_string.rb', line 117

def clone
  Impl.new( format, tokens.map{|t|t})
end

#derive!(*args) ⇒ Object Also known as: derive

Equal to calling clone.surround()



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# File 'lib/token_string.rb', line 154

def derive!(*args)
  clone.surround( *args)
end

#force(new_format) ⇒ Object

Make this Impl a different type.

This method simply sets format to the given new format.



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# File 'lib/token_string.rb', line 100

def force(new_format)
  @format = new_format
  self
end

#lines ⇒ Object

Some string methods that may get called on us



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# File 'lib/token_string.rb', line 162

def lines; [to_s]; end

#postfix(*pf) ⇒ Object

Appends a token to the end of the tokens



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# File 'lib/token_string.rb', line 136

def postfix( *pf )
  tokens.push(*TokenString.linearize_tokens(pf))
  self
end

#postfix!(*pf) ⇒ Object

Equal to calling .clone.postfix(…)



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# File 'lib/token_string.rb', line 142

def postfix!( *pf )
  clone.postfix(*pf)
end

#prefix(*pf) ⇒ Object

Appends a token to the beginning to the tokens



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# File 'lib/token_string.rb', line 125

def prefix( *pf )
  tokens.unshift(*TokenString.linearize_tokens(pf))
  self
end

#prefix!(*pf) ⇒ Object

Equal to calling .clone.prefix(…)



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# File 'lib/token_string.rb', line 131

def prefix!( *pf )
  clone.prefix(*pf)
end

#surround(prefix_, *postfix_) ⇒ Object

Equal to calling prefix(<prefix>).postfix(<postfix>)



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# File 'lib/token_string.rb', line 147

def surround( prefix_, *postfix_ )
  prefix( prefix_ )
  postfix( *postfix_ ) unless postfix_.empty?
  self
end

#to(new_format) ⇒ Object

“cast” this Imple to a different type. These casts use the same underlying buffer to be cheap.



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# File 'lib/token_string.rb', line 91

def to(new_format)
  Impl.new( new_format, tokens )
end

#to_s ⇒ Object

Convert to string



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# File 'lib/token_string.rb', line 106

def to_s
  TokenString.convert_tokens_to( @tokens, @format )
end