Class: Opal::Rewriters::LogicalOperatorAssignment
- Inherits:
-
Base
- Object
- Parser::AST::Processor
- Base
- Opal::Rewriters::LogicalOperatorAssignment
- Defined in:
- opal/lib/opal/rewriters/logical_operator_assignment.rb
Direct Known Subclasses
Defined Under Namespace
Classes: ConditionalSendHandler, SendHandler
Constant Summary collapse
- GET_SET =
->(get_type, set_type) { ->(lhs, rhs, root_type) { get_node = lhs.updated(get_type) # lhs condition_node = s(root_type, get_node, rhs) # lhs || rhs if %i[const cvar].include?(get_type) && root_type == :or # defined?(lhs) defined_node = s(:defined?, get_node) # LHS = defined?(LHS) ? (LHS || rhs) : rhs condition_node = s(:if, defined_node, s(:begin, condition_node), rhs) end lhs.updated(set_type, [*lhs, condition_node]) # lhs = lhs || rhs } }
- LocalVariableHandler =
Takes
lhs ||= rhs
Produceslhs = lhs || rhs
- InstanceVariableHandler =
Takes
@lhs ||= rhs
Produces@lhs = @lhs || rhs
- ConstantHandler =
Takes
LHS ||= rhs
ProducesLHS = defined?(LHS) ? (LHS || rhs) : rhs
Takes
LHS &&= rhs
ProducesLHS = LHS && rhs
- GlobalVariableHandler =
Takes
$lhs ||= rhs
Produces$lhs = $lhs || rhs
- ClassVariableHandler =
Takes
@@lhs ||= rhs
Produces@@lhs = defined?(@@lhs) ? (@@lhs || rhs) : rhs
Takes
@@lhs &&= rhs
Produces@@lhs = @@lhs && rhs
- HANDLERS =
{ lvasgn: LocalVariableHandler, ivasgn: InstanceVariableHandler, casgn: ConstantHandler, gvasgn: GlobalVariableHandler, cvasgn: ClassVariableHandler, send: SendHandler, csend: ConditionalSendHandler }.freeze
- ASSIGNMENT_STRING_NODE =
s(:str, 'assignment')
Constants inherited from Base
Instance Attribute Summary
Attributes inherited from Base
Class Method Summary collapse
Instance Method Summary collapse
-
#on_and_asgn(node) ⇒ Object
lhs &&= rhs.
-
#on_defined?(node) ⇒ Boolean
Rewrites any or_asgn and and_asgn node like
defined?(a ||= 1)
anddefined?(a &&= 1)
to a static "assignment" string node. -
#on_or_asgn(node) ⇒ Object
lhs ||= rhs.
Methods inherited from Base
#append_to_body, #begin_with_stmts, #dynamic!, #error, #on_top, #prepend_to_body, #process, s, #s, #stmts_of
Class Method Details
.new_temp ⇒ Object
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# File 'opal/lib/opal/rewriters/logical_operator_assignment.rb', line 12 def self.new_temp @@counter ||= 0 @@counter += 1 :"$logical_op_recvr_tmp_#{@@counter}" end |
.reset_tmp_counter! ⇒ Object
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# File 'opal/lib/opal/rewriters/logical_operator_assignment.rb', line 8 def self.reset_tmp_counter! @@counter = 0 end |
Instance Method Details
#on_and_asgn(node) ⇒ Object
lhs &&= rhs
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# File 'opal/lib/opal/rewriters/logical_operator_assignment.rb', line 140 def on_and_asgn(node) lhs, rhs = *node result = HANDLERS .fetch(lhs.type) { error "cannot handle LHS type: #{lhs.type}" } .call(lhs, rhs, :and) process(result) end |
#on_defined?(node) ⇒ Boolean
Rewrites any or_asgn and and_asgn node like
defined?(a ||= 1)
and
defined?(a &&= 1)
to a static "assignment" string node
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# File 'opal/lib/opal/rewriters/logical_operator_assignment.rb', line 157 def on_defined?(node) inner, _ = *node if %i[or_asgn and_asgn].include?(inner.type) ASSIGNMENT_STRING_NODE else super(node) end end |
#on_or_asgn(node) ⇒ Object
lhs ||= rhs
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# File 'opal/lib/opal/rewriters/logical_operator_assignment.rb', line 129 def on_or_asgn(node) lhs, rhs = *node result = HANDLERS .fetch(lhs.type) { error "cannot handle LHS type: #{lhs.type}" } .call(lhs, rhs, :or) process(result) end |