Sha256: 4704e39de550c7be3d797a486cf8c9363dd4aee02beec66ec9ee5d38b03065f7
Contents?: true
Size: 1.79 KB
Versions: 5
Compression:
Stored size: 1.79 KB
Contents
module Ruby2JS
class Converter
# (block
# (send nil :x)
# (args
# (arg :a))
# (lvar :a))
handle :block do |call, args, block|
if
@state == :statement and args.children.length == 1 and
call.children.first and call.children.first.type == :begin and
call.children[1] == :step and
[:irange, :erange].include? call.children.first.children.first.type
then
# convert combinations of range, step and block to a for loop
var = args.children.first
expression = call.children.first.children.first
comp = (expression.type == :irange ? '<=' : '<')
put "for (var "; parse var; put " = "; parse expression.children.first
put "; "; parse var; put " #{comp} "; parse expression.children.last
put "; "; parse var; put " += "; parse call.children[2]; puts ") {"
scope block
sput "}"
elsif
call.children[0] == nil and call.children[1] == :function and
call.children[2..-1].all? do |child|
child.type == :lvar or (child.type == :send and
child.children.length == 2 and child.children[0] == nil and
Symbol === child.children[1])
end
then
# accommodate javascript style syntax: convert function blocks with
# simple arguments into an anonymous function
args = call.children[2..-1].map {|arg| s(:arg, arg.children.last)}
parse @ast.updated(:block, [s(:send, nil, :proc),
s(:args, *args), block])
else
# convert blocks into method calls with an additional argument
# consisting of an anonymous function
block ||= s(:begin)
function = @ast.updated(:def, [nil, args, block])
parse s(:send, *call.children, function)
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems