destructuring a list comprehension produces invalid code #411

s-ol · 2020-02-19T19:49:54Z

{ a, b, c } = [a * 2 for a in *{ 1, 2, 3}]

in http://moonscript.org/compiler/:

do
  local _accum_0 = { }
  local _len_0 = 1
  local _list_0 = {
    1,
    2,
    3
  }
  for _index_0 = 1, #_list_0 do
    local a = _list_0[_index_0]
    _accum_0[_len_0] = a * 2
    _len_0 = _len_0 + 1
  end
  local a, b, c
  a, b, c = _accum_0[1], _accum_0[2], _accum_0[3]
end

leading to undefined reference to global errors in very unexpected ways.
Temporary workaround is to manually declare a,b,c like so:

local a, b, c
{ a, b, c } = [a * 2 for a in *{ 1, 2, 3}]

s-ol changed the title ~~Table destructuring and List Comprehension produce invalid code~~ destructuring a list comprehension produces invalid code Feb 21, 2020

leafo / moonscript

destructuring a list comprehension produces invalid code #411

destructuring a list comprehension produces invalid code #411

s-ol commented Feb 19, 2020 •

edited

leafo / moonscript

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destructuring a list comprehension produces invalid code #411

destructuring a list comprehension produces invalid code #411

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s-ol commented Feb 19, 2020 • edited

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s-ol commented Feb 19, 2020 •

edited