Class: Keisan::Functions::Range
Instance Attribute Summary
#arity, #name
Instance Method Summary
collapse
#differentiate, #unbound_variables
Constructor Details
#initialize ⇒ Range
Returns a new instance of Range.
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# File 'lib/keisan/functions/range.rb', line 4
def initialize
super("range", ::Range.new(1,3))
end
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Instance Method Details
#call(context, *args) ⇒ Object
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# File 'lib/keisan/functions/range.rb', line 8
def call(context, *args)
start, finish, shift = start_finish_shift_from_args(*args)
if shift == 1
start_finish_range(start, finish)
else
start_finish_shift_range(start, finish, shift)
end
end
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#evaluate(ast_function, context = nil) ⇒ Object
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# File 'lib/keisan/functions/range.rb', line 23
def evaluate(ast_function, context = nil)
validate_arguments!(ast_function.children.count)
context ||= Keisan::Context.new
simplify(ast_function, context)
end
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#simplify(ast_function, context = nil) ⇒ Object
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# File 'lib/keisan/functions/range.rb', line 29
def simplify(ast_function, context = nil)
validate_arguments!(ast_function.children.count)
context ||= Context.new
simplified_children = ast_function.children.map {|child| child.simplify(context)}
if simplified_children.all? {|child| child.is_a?(Keisan::AST::Number)}
Keisan::AST::List.new(call(context, *simplified_children.map(&:value)))
else
Keisan::AST::Function.new(simplified_children, "range")
end
end
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#value(ast_function, context = nil) ⇒ Object
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# File 'lib/keisan/functions/range.rb', line 18
def value(ast_function, context = nil)
validate_arguments!(ast_function.children.count)
evaluate(ast_function, context)
end
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