Foo ||= bar
becomes
defined?(Foo) ? Foo : Foo = bar
Desugar ‘x ||= y` to `defined?(x) ? x : x = y`
Dispatch enter and leave events for AliasGlobalVariableNode nodes and continue walking the tree.
Dispatch enter and leave events for BackReferenceReadNode nodes and continue walking the tree.
Dispatch enter and leave events for BlockLocalVariableNode nodes and continue walking the tree.
Dispatch enter and leave events for ClassVariableReadNode nodes and continue walking the tree.
Dispatch enter and leave events for ClassVariableWriteNode nodes and continue walking the tree.
Dispatch enter and leave events for ConstantAndWriteNode nodes and continue walking the tree.
Dispatch enter and leave events for ConstantOrWriteNode nodes and continue walking the tree.
Dispatch enter and leave events for GlobalVariableReadNode nodes and continue walking the tree.
Dispatch enter and leave events for GlobalVariableWriteNode nodes and continue walking the tree.
Dispatch enter and leave events for InstanceVariableReadNode nodes and continue walking the tree.
Dispatch enter and leave events for InstanceVariableWriteNode nodes and continue walking the tree.
Dispatch enter and leave events for LocalVariableReadNode nodes and continue walking the tree.
Dispatch enter and leave events for LocalVariableWriteNode nodes and continue walking the tree.