Class: MiniRuby::NativeFunction

Inherits:
Object
  • Object
show all
Extended by:
T::Sig
Defined in:
lib/miniruby/native_function.rb

Overview

A native function that is available in MiniRuby

Constant Summary collapse

Func = 
T.type_alias { T.proc.params(vm: VM, args: T::Array[Object]).returns(Object) }

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name:, param_count: 0, &func) ⇒ NativeFunction

: (name: Symbol, ?param_count: Integer) { (?) -> untyped } -> void



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# File 'lib/miniruby/native_function.rb', line 23

def initialize(name:, param_count: 0, &func)
  @name = name
  @func = func
  @param_count = param_count
end

Instance Attribute Details

#func ⇒ Object (readonly)

: Func



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# File 'lib/miniruby/native_function.rb', line 20

def func
  @func
end

#name ⇒ Object (readonly)

: Symbol



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# File 'lib/miniruby/native_function.rb', line 12

def name
  @name
end

#param_count ⇒ Object (readonly)

: Integer



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# File 'lib/miniruby/native_function.rb', line 15

def param_count
  @param_count
end

Instance Method Details

#call(vm, args) ⇒ Object

: (VM vm, Array args) -> Object



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# File 'lib/miniruby/native_function.rb', line 30

def call(vm, args)
  arg_count = args.length - 1
  if arg_count != @param_count
    raise ArgumentError, "#{@name}: got #{arg_count} arguments, expected #{@param_count}"
  end

  @func.call(vm, args)
end