Module: Kumi::Core::Compiler::AccessEmit::Ravel

Extended by:
Base
Defined in:
lib/kumi/core/compiler/access_emit/ravel.rb

Class Method Summary collapse

Methods included from Base

array_guard_code, build_array_miss_action, build_miss_action, fetch_hash_code, segment_ops

Class Method Details

.build(plan) ⇒ Object 



9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
 
# File 'lib/kumi/core/compiler/access_emit/ravel.rb', line 9

def build(plan)
  policy     = plan.on_missing || :error
  key_policy = plan.key_policy || :indifferent
  path_key   = plan.path
  segs       = segment_ops(plan.operations)

  code = +"lambda do |data|\n"
  code << "  out = []\n"
  nodev = "node0"
  depth = 0
  loop_depth = 0
  code << "  #{nodev} = data\n"

  segs.each do |seg|
    if seg == :array
      code << "  #{array_guard_code(node_var: nodev, mode: :ravel, policy: policy, path_key: path_key, map_depth: loop_depth)}\n"
      code << "  ary#{loop_depth} = #{nodev}\n"
      code << "  len#{loop_depth} = ary#{loop_depth}.length\n"
      code << "  i#{loop_depth} = -1\n"
      code << "  while (i#{loop_depth} += 1) < len#{loop_depth}\n"
      child = "node#{depth + 1}"
      code << "    #{child} = ary#{loop_depth}[i#{loop_depth}]\n"
      nodev = child
      depth += 1
      loop_depth += 1
    else
      seg.each do |(_, key, preview)|
        code << "  "
        code << fetch_hash_code(node_var: nodev, key: key, key_policy: key_policy,
                                preview_array: preview, mode: :ravel, policy: policy,
                                path_key: path_key, map_depth: loop_depth)
        code << "\n"
      end
    end
  end

  code << "  out << #{nodev}\n"
  while loop_depth.positive?
    code << "  end\n"
    loop_depth -= 1
    nodev = "node#{depth - 1}"
    depth -= 1
  end

  code << "  out\nend\n"
  code
end