Class: SyntaxTree::YARV::ConcatArray

Inherits:
Object
  • Object
show all
Defined in:
lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

concatarray concatenates the two Arrays on top of the stack.

It coerces the two objects at the top of the stack into Arrays by calling to_a if necessary, and makes sure to dup the first Array if it was already an Array, to avoid mutating it when concatenating.

### Usage

~~~ruby

1, *2

~~~

Instance Method Summary collapse

Instance Method Details

#call(vm) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 675

def call(vm)
  left, right = vm.pop(2)
  vm.push([*left, *right])
end

#canonical ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 671

def canonical
  self
end

#disasm(fmt) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 651

def disasm(fmt)
  fmt.instruction("concatarray")
end

#length ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 659

def length
  1
end

#pops ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 663

def pops
  2
end

#pushes ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 667

def pushes
  1
end

#to_a(_iseq) ⇒ Object 



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# File 'lib/syntax_tree/yarv/instructions.rb', line 655

def to_a(_iseq)
  [:concatarray]
end