Class: SyntaxTree::YARV::DupN
- Inherits:
-
Instruction
- Object
- Instruction
- SyntaxTree::YARV::DupN
- Defined in:
- lib/syntax_tree/yarv/instructions.rb
Overview
### Summary
‘dupn` duplicates the top `n` stack elements.
### Usage
~~~ruby Object::X ||= true ~~~
Instance Attribute Summary collapse
-
#number ⇒ Object
readonly
Returns the value of attribute number.
Instance Method Summary collapse
- #==(other) ⇒ Object
- #call(vm) ⇒ Object
- #deconstruct_keys(_keys) ⇒ Object
- #disasm(fmt) ⇒ Object
-
#initialize(number) ⇒ DupN
constructor
A new instance of DupN.
- #length ⇒ Object
- #pushes ⇒ Object
- #to_a(_iseq) ⇒ Object
Methods inherited from Instruction
#branch_targets, #canonical, #falls_through?, #leaves?, #pops, #side_effects?
Constructor Details
#initialize(number) ⇒ DupN
Returns a new instance of DupN.
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# File 'lib/syntax_tree/yarv/instructions.rb', line 1345 def initialize(number) @number = number end |
Instance Attribute Details
#number ⇒ Object (readonly)
Returns the value of attribute number.
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# File 'lib/syntax_tree/yarv/instructions.rb', line 1343 def number @number end |
Instance Method Details
#==(other) ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 1361 def ==(other) other.is_a?(DupN) && other.number == number end |
#call(vm) ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 1373 def call(vm) values = vm.pop(number) vm.push(*values) vm.push(*values) end |
#deconstruct_keys(_keys) ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 1357 def deconstruct_keys(_keys) { number: number } end |
#disasm(fmt) ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 1349 def disasm(fmt) fmt.instruction("dupn", [fmt.object(number)]) end |
#length ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 1365 def length 2 end |
#pushes ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 1369 def pushes number end |
#to_a(_iseq) ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 1353 def to_a(_iseq) [:dupn, number] end |