Class: Opal::Rewriters::LogicalOperatorAssignment::ConditionalSendHandler
- Inherits:
-
Opal::Rewriters::LogicalOperatorAssignment
- Object
- Parser::AST::Processor
- Base
- Opal::Rewriters::LogicalOperatorAssignment
- Opal::Rewriters::LogicalOperatorAssignment::ConditionalSendHandler
- Defined in:
- opal/lib/opal/rewriters/logical_operator_assignment.rb
Overview
Takes recvr&.meth ||= rhs
Produces recvr.nil? ? nil : recvr.meth ||= rhs
NOTE: Later output of this handler gets post-processed by this rewriter again
using SendHandler to recvr.nil? ? nil : (recvr.meth || recvr.meth = rhs)
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
94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 |
# File 'opal/lib/opal/rewriters/logical_operator_assignment.rb', line 94 def self.call(lhs, rhs, root_type) root_type = :"#{root_type}_asgn" recvr, meth, *args = *lhs recvr_tmp = new_temp cache_recvr = s(:lvasgn, recvr_tmp, recvr) # $tmp = recvr recvr = s(:js_tmp, recvr_tmp) recvr_is_nil = s(:send, recvr, :nil?) # recvr.nil? plain_send = lhs.updated(:send, [recvr, meth, *args]) # recvr.meth plain_or_asgn = s(root_type, plain_send, rhs) # recvr.meth ||= rhs s(:begin, cache_recvr, s(:if, recvr_is_nil, # if recvr.nil? s(:nil), # nil # else plain_or_asgn # recvr.meth ||= rhs ), ) # end end |