Class: Kumi::Core::Analyzer::ConstantEvaluator

Inherits:
Object
  • Object
show all
Defined in:
lib/kumi/core/analyzer/constant_evaluator.rb

Constant Summary collapse

NAST = 
Kumi::Core::NAST

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(call_node, registry, known_constants) ⇒ ConstantEvaluator

Returns a new instance of ConstantEvaluator.



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# File 'lib/kumi/core/analyzer/constant_evaluator.rb', line 13

def initialize(call_node, registry, known_constants)
  @node = call_node
  @registry = registry
  @known_constants = known_constants
end

Class Method Details

.evaluate(call_node, registry, known_constants = {}) ⇒ Object 



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# File 'lib/kumi/core/analyzer/constant_evaluator.rb', line 9

def self.evaluate(call_node, registry, known_constants = {})
  new(call_node, registry, known_constants).evaluate
end

Instance Method Details

#evaluate ⇒ Object 



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# File 'lib/kumi/core/analyzer/constant_evaluator.rb', line 19

def evaluate
  arg_values = @node.args.map { |arg| resolve_constant_value(arg) }

  return nil if arg_values.any?(&:nil?)

  func = @registry.function(@node.fn)

  return nil unless func.respond_to?(:folding_class_method) && func.folding_class_method

  method_name = func.folding_class_method.to_sym

  ConstantFoldingHelpers.send(method_name, *arg_values)
rescue StandardError
  nil
end