Class: SyntaxTree::YARV::OptLength
Overview
### Summary
‘opt_length` is a specialization of `opt_send_without_block`, when the `length` method is called. There are fast paths when the receiver is either a string, hash, or array. It pops the receiver off the stack and pushes on the result of the method call.
### Usage
~~~ruby “”.length ~~~
Instance Attribute Summary collapse
Instance Method Summary
collapse
Methods inherited from Instruction
#branch_targets, #falls_through?, #leaves?, #side_effects?
Constructor Details
#initialize(calldata) ⇒ OptLength
Returns a new instance of OptLength.
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3373
def initialize(calldata)
@calldata = calldata
end
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Instance Attribute Details
#calldata ⇒ Object
Returns the value of attribute calldata.
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3371
def calldata
@calldata
end
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Instance Method Details
#==(other) ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3389
def ==(other)
other.is_a?(OptLength) && other.calldata == calldata
end
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#call(vm) ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3409
def call(vm)
canonical.call(vm)
end
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#canonical ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3405
def canonical
Send.new(calldata, nil)
end
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#deconstruct_keys(_keys) ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3385
def deconstruct_keys(_keys)
{ calldata: calldata }
end
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#disasm(fmt) ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3377
def disasm(fmt)
fmt.instruction("opt_length", [fmt.calldata(calldata)])
end
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#length ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3393
def length
2
end
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#pops ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3397
def pops
1
end
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#pushes ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3401
def pushes
1
end
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#to_a(_iseq) ⇒ Object
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# File 'lib/syntax_tree/yarv/instructions.rb', line 3381
def to_a(_iseq)
[:opt_length, calldata.to_h]
end
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