sxp.md
In lobstr: Visualize R Data Structures with Trees

can inspect all atomic vectors

Code
  sxp(x)
Output
  [1] <VECSXP[6]> ()
    [2] <LGLSXP[1]> ()
    [3] <INTSXP[1]> ()
    [4] <REALSXP[1]> ()
    [5] <STRSXP[1]> ()
    [6] <CPLXSXP[1]> ()
    [7] <RAWSXP[1]> ()

can inspect functions

Code
  sxp(f)
Output
  [1] <CLOSXP> ()
    _formals [2] <LISTSXP> ()
      x [3] <SYMSXP: > ()
      y [4] <REALSXP[1]> ()
      ... [3]
    _body [5] <LANGSXP> ()
      ...
    _env [6] <ENVSXP: global> ()

can inspect environments

Code
  print(sxp(e2))
Output
  [1] <ENVSXP> ()
    _enclos [2] <ENVSXP> ()
      x [3] <REALSXP[1]> ()
      y [2]
      _enclos [4] <ENVSXP: empty> ()
Code
  print(sxp(e2, expand = "environment", max_depth = 5L))
Output
  [1] <ENVSXP> ()
    _frame <NILSXP>
    _hashtab [3] <VECSXP[5]> ()
      <NILSXP>
      <NILSXP>
      <NILSXP>
      <NILSXP>
      <NILSXP>
    _enclos [4] <ENVSXP> ()
      _frame <NILSXP>
      _hashtab [5] <VECSXP[5/2]> ()
        [6] <LISTSXP> ()
          x [7] <REALSXP[1]> ()
        [8] <LISTSXP> ()
          y [4]
        <NILSXP>
        <NILSXP>
        <NILSXP>
      _enclos [9] <ENVSXP: empty> ()

can expand altrep

Code
  x <- 1:10
  print(sxp(x, expand = "altrep", max_depth = 4L))
Output
  [1] <INTSXP[10]> (altrep )
    _class [2] <RAWSXP[144]> ()
      _attrib [3] <LISTSXP> ()
        [4] <SYMSXP: compact_intseq> ()
        [5] <SYMSXP: base> ()
        [6] <INTSXP[1]> ()
    _data1 [7] <REALSXP[3]> ()
    _data2 <NILSXP>

can inspect cons cells

Code
  cell <- new_node(1, 2)
  sxp(cell)
Output
  [1] <LISTSXP> ()
    [2] <REALSXP[1]> ()
    _cdr [3] <REALSXP[1]> ()
Code
  non_nil_terminated_list <- new_node(1, new_node(2, 3))
  sxp(non_nil_terminated_list)
Output
  [1] <LISTSXP> ()
    [2] <REALSXP[1]> ()
    [3] <REALSXP[1]> ()
    _cdr [4] <REALSXP[1]> ()