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Contents
# frozen_string_literal: true
require 'opal/rewriters/base'
module Opal
module Rewriters
class ExplicitWriterReturn < Base
def initialize
@in_masgn = false
end
TMP_NAME = '$writer'
GET_ARGS_NODE = s(:lvar, TMP_NAME)
RETURN_ARGS_NODE = s(:jsattr,
GET_ARGS_NODE,
s(:send, s(:jsattr, GET_ARGS_NODE, s(:str, 'length')), :-, s(:int, 1)),
)
def on_send(node)
return super if @in_masgn
recv, method_name, *args = *node
if method_name.to_s =~ /#{REGEXP_START}\w+=#{REGEXP_END}/ || method_name.to_s == '[]='
set_args_node = s(:lvasgn, TMP_NAME, s(:array, *process_all(args)))
s(:begin,
set_args_node,
node.updated(nil, [recv, method_name, s(:splat, GET_ARGS_NODE)]),
RETURN_ARGS_NODE,
)
else
super
end
end
# Multiple assignment is handled by Opal::Nodes::MassAssignNode
#
# For example, "self.a, self.b = 1, 2" parses to:
# s(:masgn,
# s(:mlhs,
# s(:send,
# s(:self), :a=),
# s(:send,
# s(:self), :b=)),
# s(:array,
# s(:int, 1),
# s(:int, 2)))
#
# And this AST rewriter skips this node.
def on_masgn(node)
@in_masgn = true
result = super
@in_masgn = false
result
end
end
end
end
Version data entries
21 entries across 21 versions & 1 rubygems