# frozen_string_literal: true # :markup: markdown module Prism module Translation class Parser # A builder that knows how to convert more modern Ruby syntax # into whitequark/parser gem's syntax tree. class Builder < ::Parser::Builders::Default # It represents the `it` block argument, which is not yet implemented in the Parser gem. def itarg n(:itarg, [:it], nil) end # The following three lines have been added to support the `it` block parameter syntax in the source code below. # # if args.type == :itarg # block_type = :itblock # args = :it # # https://github.com/whitequark/parser/blob/v3.3.7.1/lib/parser/builders/default.rb#L1122-L1155 def block(method_call, begin_t, args, body, end_t) _receiver, _selector, *call_args = *method_call if method_call.type == :yield diagnostic :error, :block_given_to_yield, nil, method_call.loc.keyword, [loc(begin_t)] end last_arg = call_args.last if last_arg && (last_arg.type == :block_pass || last_arg.type == :forwarded_args) diagnostic :error, :block_and_blockarg, nil, last_arg.loc.expression, [loc(begin_t)] end if args.type == :itarg block_type = :itblock args = :it elsif args.type == :numargs block_type = :numblock args = args.children[0] else block_type = :block end if [:send, :csend, :index, :super, :zsuper, :lambda].include?(method_call.type) n(block_type, [ method_call, args, body ], block_map(method_call.loc.expression, begin_t, end_t)) else # Code like "return foo 1 do end" is reduced in a weird sequence. # Here, method_call is actually (return). actual_send, = *method_call block = n(block_type, [ actual_send, args, body ], block_map(actual_send.loc.expression, begin_t, end_t)) n(method_call.type, [ block ], method_call.loc.with_expression(join_exprs(method_call, block))) end end end end end end