all repos — min @ 854dc391e4724d549431001635e1523d8e42a672

A small but practical concatenative programming language.

lib/num.nim

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import tables
import 
  ../core/types,
  ../core/parser, 
  ../core/interpreter, 
  ../core/utils

  # Arithmetic
  
define("num")

  .symbol("+") do (i: In):
    let a = i.pop
    let b = i.pop
    if a.isInt:
      if b.isInt:
        i.push newVal(a.intVal + b.intVal)
      elif b.isFloat:
        i.push newVal(a.intVal.float + b.floatVal)
      else:
        i.error(errTwoNumbersRequired)
    elif a.isFloat:
      if b.isFloat:
        i.push newVal(a.floatVal + b.floatVal)
      elif b.isInt:
        i.push newVal(a.floatVal + b.intVal.float)
      else:
        i.error(errTwoNumbersRequired)
  
  .symbol("-") do (i: In):
    let a = i.pop
    let b = i.pop
    if a.isInt:
      if b.isInt:
        i.push newVal(b.intVal - a.intVal)
      elif b.isFloat:
        i.push newVal(b.floatVal - a.intVal.float)
      else:
        i.error(errTwoNumbersRequired)
    elif a.isFloat:
      if b.isFloat:
        i.push newVal(b.floatVal - a.floatVal)
      elif b.isInt:
        i.push newVal(b.intVal.float - a.floatVal) 
      else:
        i.error(errTwoNumbersRequired)
  
  .symbol("*") do (i: In):
    let a = i.pop
    let b = i.pop
    if a.isInt:
      if b.isInt:
        i.push newVal(a.intVal * b.intVal)
      elif b.isFloat:
        i.push newVal(a.intVal.float * b.floatVal)
      else:
        i.error(errTwoNumbersRequired)
    elif a.isFloat:
      if b.isFloat:
        i.push newVal(a.floatVal * b.floatVal)
      elif b.isInt:
        i.push newVal(a.floatVal * b.intVal.float)
      else:
        i.error(errTwoNumbersRequired)
  
  .symbol("/") do (i: In):
    let a = i.pop
    let b = i.pop
    if a.isInt:
      if b.isInt:
        i.push newVal(b.intVal / a.intVal)
      elif b.isFloat:
        i.push newVal(b.floatVal / a.intVal.float)
      else:
        i.error(errTwoNumbersRequired)
    elif a.isFloat:
      if b.isFloat:
        i.push newVal(b.floatVal / a.floatVal)
      elif b.isInt:
        i.push newVal(b.intVal.float / a.floatVal) 
      else:
        i.error(errTwoNumbersRequired)
  
  .symbol("div") do (i: In):
    let b = i.pop
    let a = i.pop
    if a.isInt and b.isInt:
      i.push(newVal(a.intVal div b.intVal))
    else:
      i.error errIncorrect, "Two integers are required on the stack"
  
  .symbol("mod") do (i: In):
    let b = i.pop
    let a = i.pop
    if a.isInt and b.isInt:
      i.push(newVal(a.intVal mod b.intVal))
    else:
      i.error errIncorrect, "Two integers are required on the stack"
  
  .finalize()