Class: SyntaxTree::YARV::NewHash

Inherits:

Instruction

• Object
• Instruction
• SyntaxTree::YARV::NewHash

Defined in:

lib/syntax_tree/yarv/instructions.rb

Overview

### Summary

‘newhash` puts a new hash onto the stack, using `number` elements from the stack. `number` needs to be even. It pops `number` elements off the stack and pushes a hash onto the stack.

### Usage

~~~ruby def foo(key, value)

{ key => value }

end ~~~

Instance Attribute Summary

• #number ⇒ Object readonly

  Returns the value of attribute number.

Instance Method Summary

• #==(other) ⇒ Object
• #call(vm) ⇒ Object
• #deconstruct_keys(_keys) ⇒ Object
• #disasm(fmt) ⇒ Object
• #initialize(number) ⇒ NewHash constructor

  A new instance of NewHash.

• #length ⇒ Object
• #pops ⇒ Object
• #pushes ⇒ Object
• #to_a(_iseq) ⇒ Object

Methods inherited from Instruction

#branch_targets, #canonical, #falls_through?, #leaves?, #side_effects?

Constructor Details

#initialize(number) ⇒ NewHash

Returns a new instance of NewHash.

# File 'lib/syntax_tree/yarv/instructions.rb', line 2420

def initialize(number)
  @number = number
end

Instance Attribute Details

#number ⇒ Object (readonly)

Returns the value of attribute number.

# File 'lib/syntax_tree/yarv/instructions.rb', line 2418

def number
  @number
end

Instance Method Details

#==(other) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2436

def ==(other)
  other.is_a?(NewHash) && other.number == number
end

#call(vm) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2452

def call(vm)
  vm.push(vm.pop(number).each_slice(2).to_h)
end

#deconstruct_keys(_keys) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2432

def deconstruct_keys(_keys)
  { number: number }
end

#disasm(fmt) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2424

def disasm(fmt)
  fmt.instruction("newhash", [fmt.object(number)])
end

#length ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2440

def length
  2
end

#pops ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2444

def pops
  number
end

#pushes ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2448

def pushes
  1
end

#to_a(_iseq) ⇒ Object

# File 'lib/syntax_tree/yarv/instructions.rb', line 2428

def to_a(_iseq)
  [:newhash, number]
end