all repos — min @ 8dc873a6adb297076184b979dbb1427a81476c07

A small but practical concatenative programming language.

lib/min_seq.nim

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import 
  critbits, 
  tables,
  sequtils,
  algorithm
import 
  ../core/parser, 
  ../core/value, 
  ../core/interpreter, 
  ../core/utils
  
# Operations on sequences (data quotations)
proc seq_module*(i: In)=

  i.define()

    .symbol("concat") do (i: In):
      var q1, q2: MinValue 
      i.reqTwoQuotations q1, q2
      let q = q2.qVal & q1.qVal
      i.push q.newVal(i.scope)
  
    .symbol("first") do (i: In):
      var q: MinValue
      i.reqQuotation q
      if q.qVal.len == 0:
        raiseOutOfBounds("Quotation is empty")
      i.push q.qVal[0]
  
    .symbol("rest") do (i: In):
      var q: MinValue
      i.reqQuotation q
      if q.qVal.len == 0:
        raiseOutOfBounds("Quotation is empty")
      i.push q.qVal[1..q.qVal.len-1].newVal(i.scope)
  
    .symbol("append") do (i: In):
      var q: MinValue
      i.reqQuotation q
      let v = i.pop
      i.push newVal(q.qVal & v, i.scope)
    
    .symbol("prepend") do (i: In):
      var q: MinValue
      i.reqQuotation q
      let v = i.pop
      i.push newVal(v & q.qVal, i.scope)
    
    .symbol("get") do (i: In):
      var index, q: MinValue
      i.reqIntAndQuotation index, q
      let ix = index.intVal
      if q.qVal.len < ix or ix < 0:
        raiseOutOfBounds("Index out of bounds")
      i.push q.qVal[ix.int]
  
    .symbol("set") do (i: In):
      var val, index, q: MinValue
      i.reqInt index
      val = i.pop
      i.reqQuotation q
      let ix = index.intVal
      if q.qVal.len < ix or ix < 0:
        raiseOutOfBounds("Index out of bounds")
      q.qVal[ix.int] = val
      i.push q
  
    .symbol("remove") do (i: In):
      var index, q: MinValue
      i.reqIntAndQuotation index, q
      let ix = index.intVal
      if q.qVal.len < ix or ix < 0:
        raiseOutOfBounds("Index out of bounds")
      var res = newSeq[MinValue](0)
      for x in 0..q.qVal.len-1:
        if x == ix:
          continue
        res.add q.qVal[x]
      i.push res.newVal(i.scope)
  
    .symbol("insert") do (i: In):
      var val, index, q: MinValue
      i.reqInt index
      val = i.pop
      i.reqQuotation q
      let ix = index.intVal
      if q.qVal.len < ix or ix < 0:
        raiseOutOfBounds("Index out of bounds")
      var res = newSeq[MinValue](0)
      for x in 0..q.qVal.len-1:
        if x == ix:
          res.add val
        res.add q.qVal[x]
      i.push res.newVal(i.scope)

    .symbol("size") do (i: In):
      var q: MinValue
      i.reqQuotation q
      i.push q.qVal.len.newVal
  
    .symbol("in?") do (i: In):
      i.reqStackSize(2)
      let v = i.pop
      var q: MinValue
      i.reqQuotation q
      i.push q.qVal.contains(v).newVal 
    
    .symbol("map") do (i: In):
      var prog, list: MinValue
      i.reqTwoQuotations prog, list
      var res = newSeq[MinValue](0)
      for litem in list.qVal:
        i.push litem
        i.unquote(prog)
        res.add i.pop
      i.push res.newVal(i.scope)

    .symbol("apply") do (i: In):
      var prog: MinValue
      i.reqQuotation prog
      i.apply prog

    .symbol("reverse") do (i: In):
      var q: MinValue
      i.reqQuotation q
      var res = newSeq[MinValue](0)
      for c in countdown(q.qVal.len-1, 0):
        res.add q.qVal[c]
      i.push res.newVal(i.scope)

    .symbol("filter") do (i: In):
      var filter, list: MinValue
      i.reqTwoQuotations filter, list
      var res = newSeq[MinValue](0)
      for e in list.qVal:
        i.push e
        i.unquote(filter)
        var check = i.pop
        if check.isBool and check.boolVal == true:
          res.add e
      i.push res.newVal(i.scope)

    .symbol("reject") do (i: In):
      var filter, list: MinValue
      i.reqTwoQuotations filter, list
      var res = newSeq[MinValue](0)
      for e in list.qVal:
        i.push e
        i.unquote(filter)
        var check = i.pop
        if check.isBool and check.boolVal == false:
          res.add e
      i.push res.newVal(i.scope)

    .symbol("any?") do (i: In):
      var filter, list: MinValue
      i.reqTwoQuotations filter, list
      for e in list.qVal:
        i.push e
        i.unquote(filter)
        var check = i.pop
        if check.isBool and check.boolVal == true:
          i.push true.newVal
          return
      i.push false.newVal

    .symbol("all?") do (i: In):
      var filter, list: MinValue
      i.reqTwoQuotations filter, list
      for e in list.qVal:
        i.push e
        i.unquote(filter)
        var check = i.pop
        if check.isBool and check.boolVal == false:
          i.push false.newVal
          break
      i.push true.newVal

    .symbol("sort") do (i: In):
      var cmp, list: MinValue
      i.reqTwoQuotations cmp, list
      var i2 = i
      var minCmp = proc(a, b: MinValue): int {.closure.}=
        i2.push a
        i2.push b
        i2.unquote(cmp)
        let r = i2.pop
        if r.isBool:
          if r.isBool and r.boolVal == true:
            return 1
          else:
            return -1
        else:
          raiseInvalid("Predicate quotation must return a boolean value")
      var qList = list.qVal
      sort[MinValue](qList, minCmp)
      i.push qList.newVal(i.scope)
    
    .symbol("shorten") do (i: In):
      var n, q: MinValue
      i.reqIntAndQuotation n, q
      if n.intVal > q.qVal.len:
        raiseInvalid("Quotation is too short")
      i.push q.qVal[0..n.intVal.int-1].newVal(i.scope)

    .symbol("find") do (i: In):
      var s, test, result: MinValue
      i.reqTwoQuotations test, s
      var res = -1
      var c = 0
      for el in s.qVal:
        i.push el
        i.unquote test
        result = i.pop
        if result.isBool and result.boolVal == true:
          res = c
          break
        c.inc
      i.push res.newVal

    .symbol("reduce") do (i: In):
      var s, q, acc: MinValue
      i.reqQuotation q
      acc = i.pop
      i.reqQuotation s
      for el in s.qVal:
        i.push acc
        i.push el
        i.unquote q
        acc = i.pop
      i.push acc

    .symbol("map-reduce") do (i: In):
      var s, map, red, acc: MinValue
      i.reqThreeQuotations red, map, s
      if s.qVal.len == 0:
        raiseInvalid("Quotation must have at least one element")
      i.push s.qVal[0]
      i.unquote map
      acc = i.pop
      for ix in 1..s.qVal.len-1:
        i.push s.qVal[ix]
        i.unquote map
        i.push acc
        i.unquote red
        acc = i.pop
      i.push acc

    .symbol("partition") do (i: In):
      var s, test: MinValue
      i.reqTwoQuotations test, s
      var tseq = newSeq[MinValue](0)
      var fseq = newSeq[MinValue](0)
      for el in s.qVal:
        i.push el
        i.unquote test
        let res = i.pop
        if res.isBool and res.boolVal == true:
          tseq.add el
        else:
          fseq.add el
      i.push tseq.newVal(i.scope)
      i.push fseq.newVal(i.scope)

    .symbol("slice") do (i: In):
      var start, finish, q: MinValue
      i.reqInt finish
      i.reqInt start
      i.reqQuotation q
      let st = start.intVal
      let fn = finish.intVal
      if st < 0 or fn > q.qVal.len-1:
        raiseOutOfBounds("Index out of bounds")
      elif fn < st:
        raiseInvalid("End index must be greater than start index")
      let rng = q.qVal[st.int..fn.int]
      i.push rng.newVal(i.scope)

    .symbol("harvest") do (i: In):
      var q: MinValue
      i.reqQuotation q
      var res = newSeq[MinValue](0)
      for el in q.qVal:
        if el.isQuotation and el.qVal.len == 0:
          continue
        res.add el
      i.push res.newVal(i.scope)

    .symbol("flatten") do (i: In):
      var q: MinValue
      i.reqQuotation q
      var res = newSeq[MinValue](0)
      for el in q.qVal:
        if el.isQuotation:
          for el2 in el.qVal:
            res.add el2
        else:
          res.add el
      i.push res.newVal(i.scope)

    # Operations on dictionaries

    .symbol("dhas?") do (i: In):
      var d, k: MinValue
      i.reqStringLike k
      i.reqDictionary d
      i.push d.dhas(k).newVal

    .symbol("dget") do (i: In):
      var d, k: MinValue
      i.reqStringLike k
      i.reqDictionary d
      i.push d.dget(k)
      
    .symbol("dset") do (i: In):
      var d, k: MinValue
      i.reqStringLike k
      let m = i.pop
      i.reqDictionary d
      i.push i.dset(d, k, m) 

    .symbol("ddel") do (i: In):
      var d, k: MinValue
      i.reqStringLike k
      i.reqDictionary d
      i.push i.ddel(d, k)

    .symbol("keys") do (i: In):
      var d: MinValue
      i.reqDictionary d
      i.push i.keys(d)

    .symbol("values") do (i: In):
      var d: MinValue
      i.reqDictionary d
      i.push i.values(d)

    

    .finalize("seq")