Class: SyntaxTree::YARV::ConcatStrings
- Inherits:
-
Instruction
- Object
- Instruction
- SyntaxTree::YARV::ConcatStrings
- Defined in:
- lib/syntax_tree/yarv/instructions.rb
Overview
### Summary
‘concatstrings` pops a number of strings from the stack joins them together into a single string and pushes that string back on the stack.
This does no coercion and so is always used in conjunction with ‘objtostring` and `anytostring` to ensure the stack contents are always strings.
### Usage
~~~ruby “#5” ~~~
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) ⇒ ConcatStrings
constructor
A new instance of ConcatStrings.
- #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) ⇒ ConcatStrings
Returns a new instance of ConcatStrings.
723 724 725 |
# File 'lib/syntax_tree/yarv/instructions.rb', line 723 def initialize(number) @number = number end |
Instance Attribute Details
#number ⇒ Object (readonly)
Returns the value of attribute number.
721 722 723 |
# File 'lib/syntax_tree/yarv/instructions.rb', line 721 def number @number end |
Instance Method Details
#==(other) ⇒ Object
739 740 741 |
# File 'lib/syntax_tree/yarv/instructions.rb', line 739 def ==(other) other.is_a?(ConcatStrings) && other.number == number end |
#call(vm) ⇒ Object
755 756 757 |
# File 'lib/syntax_tree/yarv/instructions.rb', line 755 def call(vm) vm.push(vm.pop(number).join) end |
#deconstruct_keys(_keys) ⇒ Object
735 736 737 |
# File 'lib/syntax_tree/yarv/instructions.rb', line 735 def deconstruct_keys(_keys) { number: number } end |
#disasm(fmt) ⇒ Object
727 728 729 |
# File 'lib/syntax_tree/yarv/instructions.rb', line 727 def disasm(fmt) fmt.instruction("concatstrings", [fmt.object(number)]) end |
#length ⇒ Object
743 744 745 |
# File 'lib/syntax_tree/yarv/instructions.rb', line 743 def length 2 end |
#pops ⇒ Object
747 748 749 |
# File 'lib/syntax_tree/yarv/instructions.rb', line 747 def pops number end |
#pushes ⇒ Object
751 752 753 |
# File 'lib/syntax_tree/yarv/instructions.rb', line 751 def pushes 1 end |
#to_a(_iseq) ⇒ Object
731 732 733 |
# File 'lib/syntax_tree/yarv/instructions.rb', line 731 def to_a(_iseq) [:concatstrings, number] end |