Class: Kalc::Ast::FunctionCall

Inherits:
Object
  • Object
show all
Defined in:
lib/kalc/ast.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, variable_list) ⇒ FunctionCall

Returns a new instance of FunctionCall.



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# File 'lib/kalc/ast.rb', line 239

def initialize(name, variable_list)
  @name = name
  @variable_list = variable_list
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/kalc/ast.rb', line 236

def name
  @name
end

#variable_list ⇒ Object (readonly)

Returns the value of attribute variable_list.



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# File 'lib/kalc/ast.rb', line 237

def variable_list
  @variable_list
end

Instance Method Details

#eval(context) ⇒ Object 



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# File 'lib/kalc/ast.rb', line 244

def eval(context)
  to_call = context.get_function(@name)
  raise "Unknown function #{@name}" unless to_call

  to_call.call(context, *@variable_list)
rescue ArgumentError
  raise "Argument Error. Function #{@name} was called with #{@variable_list.count} parameters. " \
       "It needs at least #{to_call.parameters.select { |a| a.first == :req }.count - 1} parameters"
end