Class: Dentaku::AST::If

Inherits:
Function show all
Defined in:
lib/dentaku/ast/functions/if.rb

Constant Summary

Constants inherited from Function

Function::DIG

Constants inherited from Node

Node::STATIC_CONTEXT, Node::STATIC_MODE_KEY

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Function

#accept, get, register, register_class, registry, volatile?

Methods inherited from Node

arity, #name, precedence, #pure?, resolve_class

Constructor Details

#initialize(predicate, left, right) ⇒ If

Returns a new instance of If.



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# File 'lib/dentaku/ast/functions/if.rb', line 16

def initialize(predicate, left, right)
  @predicate = predicate
  @left      = left
  @right     = right
end

Instance Attribute Details

#left ⇒ Object (readonly)

Returns the value of attribute left.



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# File 'lib/dentaku/ast/functions/if.rb', line 6

def left
  @left
end

#predicate ⇒ Object (readonly)

Returns the value of attribute predicate.



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# File 'lib/dentaku/ast/functions/if.rb', line 6

def predicate
  @predicate
end

#right ⇒ Object (readonly)

Returns the value of attribute right.



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# File 'lib/dentaku/ast/functions/if.rb', line 6

def right
  @right
end

Class Method Details

.max_param_count ⇒ Object 



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# File 'lib/dentaku/ast/functions/if.rb', line 12

def self.max_param_count
  3
end

.min_param_count ⇒ Object 



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# File 'lib/dentaku/ast/functions/if.rb', line 8

def self.min_param_count
  3
end

Instance Method Details

#args ⇒ Object 



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# File 'lib/dentaku/ast/functions/if.rb', line 22

def args
  [predicate, left, right]
end

#dependencies(context = {}) ⇒ Object 



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# File 'lib/dentaku/ast/functions/if.rb', line 38

def dependencies(context = {})
  return all_arg_dependencies(context) if static_mode?(context) || !predicate.pure?

  predicate.value(context) ? left.dependencies(context) : right.dependencies(context)
rescue Dentaku::Error
  all_arg_dependencies(context)
end

#node_type ⇒ Object 



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# File 'lib/dentaku/ast/functions/if.rb', line 30

def node_type
  :condition
end

#type ⇒ Object 



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# File 'lib/dentaku/ast/functions/if.rb', line 34

def type
  left.type
end

#value(context = {}) ⇒ Object 



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# File 'lib/dentaku/ast/functions/if.rb', line 26

def value(context = {})
  predicate.value(context) ? left.value(context) : right.value(context)
end