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#!/usr/bin/env dbqn

# Process BQN runtime

impl  •FLines "r.bqn"

chrs
  "+-×÷⋆√⌊⌈|¬∧∨<>≠=≤≥≡≢⊣⊢⥊∾≍↑↓↕«»⌽⍉/⍋⍒⊏⊑⊐⊒∊⍷⊔!"
  "˙˜˘¨⌜⁼´˝`"
  "∘○⊸⟜⌾⊘◶⎉⚇⍟"

nc  ¨chrs
chr  chrs
itr  0˜chr

init  " "¨(/"_"¨nc/011)¨(nc/"FMD")¨(nc+´↑⥊"ABC"•a)
post  " "¨/"_"¨nc/001
names  init¨'0'¨post

Inc  {
  ichr𝕩
  n0  itr{n1+𝕩}(i⊑⊢)itr
  names((iinit)('0'+n)ipost)(i⊑⊢)names
}

# Required functionality passed in as an argument
def  "IsArray","Type","Log","GroupLen","GroupOrd"
keep  "!+-×÷⋆⌊=≤≢⥊⊑↕⌜`⊘"
len  def+keep
ki  chrkeep
kt  (+`nc)(((def)¯1↓⊣)+⊔)ki
names  (¨ktchr)(ki)names


E_isdef  (3≤≠)0,´chr," ","←↩"˜¨3
E_proc  ({𝕨𝕩}´ {𝕨•_R_𝕩}¨(≠↑chr˜) def){
  lchr
  q`𝕩='"'  q`q<𝕩=''' ⋄ f←¬∨`q<𝕩='#'
   (((l×f/q)+chr) (l)names,¨ ) f/𝕩
}
E_redef  { # handles [fmd] [←↩]
  tail  E_proc 3𝕩 # must use old def
  Inc 𝕩
  (E_proc 1𝕩)  "←"  tail
}

ref  ∾∾(@+10)¨ E_isdefE_procE_redef¨ impl∾<"⟨""⟩"˜1↓⥊","˘chr