Class: Rubycli::Arguments::TokenStream

Inherits:
Object
  • Object
show all
Defined in:
lib/rubycli/arguments/token_stream.rb

Overview

Lightweight mutable cursor over CLI tokens.

Instance Method Summary collapse

Constructor Details

#initialize(tokens) ⇒ TokenStream

Returns a new instance of TokenStream.



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# File 'lib/rubycli/arguments/token_stream.rb', line 7

def initialize(tokens)
  @tokens = Array(tokens).dup
  @index = 0
end

Instance Method Details

#advance(count = 1) ⇒ Object 



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# File 'lib/rubycli/arguments/token_stream.rb', line 20

def advance(count = 1)
  @index += count
end

#consume ⇒ Object 



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# File 'lib/rubycli/arguments/token_stream.rb', line 24

def consume
  value = current
  advance
  value
end

#consume_remaining ⇒ Object 



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# File 'lib/rubycli/arguments/token_stream.rb', line 30

def consume_remaining
  remaining = @tokens[@index..] || []
  @index = @tokens.length
  remaining
end

#current ⇒ Object 



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# File 'lib/rubycli/arguments/token_stream.rb', line 12

def current
  @tokens[@index]
end

#finished? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubycli/arguments/token_stream.rb', line 36

def finished?
  @index >= @tokens.length
end

#peek(offset = 1) ⇒ Object 



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# File 'lib/rubycli/arguments/token_stream.rb', line 16

def peek(offset = 1)
  @tokens[@index + offset]
end