Class: Soroban::ValueWalker

Inherits:

Object

• Object
• Soroban::ValueWalker

show all

Includes:

Enumerable

Defined in:

lib/soroban/value_walker.rb

Overview

Instance Method Summary (collapse)

• - (Object) [](index)

  Retrieve the value of a cell within the range by index.

• - (Object) []=(index, value)

  Set the value of a cell within the range by index.

• - (Object) each

  Yield the value of each cell referenced by the supplied range.

• - (ValueWalker) initialize(range, context) constructor

  Create a new walker from a supplied range and binding.

• - (Object) to_s (also: #inspect)

  Display the range if the user outputs the binding directly.

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# File 'lib/soroban/value_walker.rb', line 10

def initialize(range, context)
  @range, @binding = range, context
  @walker = LabelWalker.new(range)
end

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# File 'lib/soroban/value_walker.rb', line 21

def [](index)
  labels = @walker.to_a
  if index < 0 || index >= labels.length
    raise Soroban::RangeError, "Index #{index} falls outside of '#{@range}'"
  end
  eval("get('#{labels[index]}')", @binding)
end

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# File 'lib/soroban/value_walker.rb', line 30

def []=(index, value)
  count = 0
  @walker.each do |label|
    if index == count
      eval("@#{label}.set('#{value}')", @binding)
      return value
    end
    count += 1
  end
  raise Soroban::RangeError, "Index #{index} falls outside of '#{@range}'"
end

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# File 'lib/soroban/value_walker.rb', line 16

def each
  @walker.each { |label| yield eval("get('#{label}')", @binding) }
end

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# File 'lib/soroban/value_walker.rb', line 43

def to_s
  @range
end