Class: Opal::Rewriters::LogicalOperatorAssignment::SendHandler
- Inherits:
-
Opal::Rewriters::LogicalOperatorAssignment
- Object
- Parser::AST::Processor
- Base
- Opal::Rewriters::LogicalOperatorAssignment
- Opal::Rewriters::LogicalOperatorAssignment::SendHandler
- Defined in:
- opal/lib/opal/rewriters/logical_operator_assignment.rb
Overview
Takes recvr.meth ||= rhs
Produces recvr.meth || recvr.meth = rhs
(lhs is a recvr.meth)
Constant Summary
Constants inherited from Opal::Rewriters::LogicalOperatorAssignment
ASSIGNMENT_STRING_NODE, ClassVariableHandler, ConstantHandler, GET_SET, GlobalVariableHandler, HANDLERS, InstanceVariableHandler, LocalVariableHandler
Constants inherited from Base
Instance Attribute Summary
Attributes inherited from Base
Class Method Summary collapse
Methods inherited from Opal::Rewriters::LogicalOperatorAssignment
new_temp, #on_and_asgn, #on_defined?, #on_or_asgn, reset_tmp_counter!
Methods inherited from Base
#append_to_body, #begin_with_stmts, #dynamic!, #error, #on_top, #prepend_to_body, #process, s, #s, #stmts_of
Class Method Details
.call(lhs, rhs, root_type) ⇒ Object
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# File 'opal/lib/opal/rewriters/logical_operator_assignment.rb', line 64 def self.call(lhs, rhs, root_type) recvr, reader_method, *args = *lhs # If recvr is a complex expression it must be cached. # MRI calls recvr in `recvr.meth ||= rhs` only once. if recvr && recvr.type == :send recvr_tmp = new_temp cache_recvr = s(:lvasgn, recvr_tmp, recvr) # $tmp = recvr recvr = s(:js_tmp, recvr_tmp) end writer_method = :"#{reader_method}=" call_reader = lhs.updated(:send, [recvr, reader_method, *args]) # $tmp.meth call_writer = lhs.updated(:send, [recvr, writer_method, *args, rhs]) # $tmp.meth = rhs get_or_set = s(root_type, call_reader, call_writer) if cache_recvr s(:begin, cache_recvr, get_or_set) else get_or_set end end |