all repos — min @ b154ead9ac4d63e4a3e954c85016154e1066294b

A small but practical concatenative programming language.

lib/logic.nim

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

# Comparison operators

define("logic")

  .symbol(">") do (i: In):
    let n2 = i.pop
    let n1 = i.pop
    if n1.isNumber and n2.isNumber:
      if n1.isInt and n2.isInt:
        i.push newVal(n1.intVal > n2.intVal)
      elif n1.isInt and n2.isFloat:
        i.push newVal(n1.intVal.float > n2.floatVal)
      elif n1.isFloat and n2.isFloat:
        i.push newVal(n1.floatVal > n2.floatVal)
      elif n1.isFloat and n2.isInt:
        i.push newVal(n1.floatVal > n2.intVal.float)
    elif n1.isString and n2.isString:
        i.push newVal(n1.strVal > n2.strVal)
    else:
      i.error(errIncorrect, "Two numbers or two strings are required on the stack")

  .symbol(">=") do (i: In):
    let n2 = i.pop
    let n1 = i.pop
    if n1.isNumber and n2.isNumber:
      if n1.isInt and n2.isInt:
        i.push newVal(n1.intVal >= n2.intVal)
      elif n1.isInt and n2.isFloat:
        i.push newVal(n1.intVal.float >= n2.floatVal)
      elif n1.isFloat and n2.isFloat:
        i.push newVal(n1.floatVal >= n2.floatVal)
      elif n1.isFloat and n2.isInt:
        i.push newVal(n1.floatVal >= n2.intVal.float)
    elif n1.isString and n2.isString:
        i.push newVal(n1.strVal >= n2.strVal)
    else:
      i.error(errIncorrect, "Two numbers or two strings are required on the stack")
  
  .symbol("<") do (i: In):
    let n1 = i.pop
    let n2 = i.pop
    if n1.isNumber and n2.isNumber:
      if n1.isInt and n2.isInt:
        i.push newVal(n1.intVal > n2.intVal)
      elif n1.isInt and n2.isFloat:
        i.push newVal(n1.intVal.float > n2.floatVal)
      elif n1.isFloat and n2.isFloat:
        i.push newVal(n1.floatVal > n2.floatVal)
      elif n1.isFloat and n2.isInt:
        i.push newVal(n1.floatVal > n2.intVal.float)
    elif n1.isString and n2.isString:
        i.push newVal(n1.strVal > n2.strVal)
    else:
      i.error(errIncorrect, "Two numbers or two strings are required on the stack")
  
  .symbol("<=") do (i: In):
    let n1 = i.pop
    let n2 = i.pop
    if n1.isNumber and n2.isNumber:
      if n1.isInt and n2.isInt:
        i.push newVal(n1.intVal >= n2.intVal)
      elif n1.isInt and n2.isFloat:
        i.push newVal(n1.intVal.float >= n2.floatVal)
      elif n1.isFloat and n2.isFloat:
        i.push newVal(n1.floatVal >= n2.floatVal)
      elif n1.isFloat and n2.isInt:
        i.push newVal(n1.floatVal >= n2.intVal.float)
    elif n1.isString and n2.isString:
        i.push newVal(n1.strVal >= n2.strVal)
    else:
      i.error(errIncorrect, "Two numbers or two strings are required on the stack")
  
  .symbol("==") do (i: In):
    let n2 = i.pop
    let n1 = i.pop
    if (n1.kind == n2.kind or (n1.isNumber and n2.isNumber)) and not n1.isSymbol:
      i.push newVal(n1 == n2)
    else:
      i.error(errIncorrect, "Two non-symbol values of similar type are required")
  
  .symbol("!=") do (i: In):
    let n2 = i.pop
    let n1 = i.pop
    if (n1.kind == n2.kind or (n1.isNumber and n2.isNumber)) and not n1.isSymbol:
      i.push newVal(not (n1 == n2))
    else:
      i.error(errIncorrect, "Two non-symbol values of similar type are required")
  
  # Boolean Logic
  
  .symbol("not") do (i: In):
    let b = i.pop
    if b.isBool:
      i.push newVal(not b.boolVal)
    else:
      i.error(errIncorrect, "A bool value is required on the stack")
  
  .symbol("and") do (i: In):
    let a = i.pop
    let b = i.pop
    if a.isBool and b.isBool:
      i.push newVal(a.boolVal and b.boolVal)
    else:
      i.error(errIncorrect, "Two bool values are required on the stack")
  
  .symbol("or") do (i: In):
    let a = i.pop
    let b = i.pop
    if a.isBool and b.isBool:
      i.push newVal(a.boolVal or b.boolVal)
    else:
      i.error(errIncorrect, "Two bool values are required on the stack")
  
  .symbol("xor") do (i: In):
    let a = i.pop
    let b = i.pop
    if a.isBool and b.isBool:
      i.push newVal(a.boolVal xor b.boolVal)
    else:
      i.error(errIncorrect, "Two bool values are required on the stack")
  
  .symbol("string?") do (i: In):
    if i.peek.kind == minString:
      i.push true.newVal
    else:
      i.push false.newVal
  
  .symbol("int?") do (i: In):
    if i.peek.kind == minInt:
      i.push true.newVal
    else:
      i.push false.newVal
  
  .symbol("float?") do (i: In):
    if i.peek.kind == minFloat:
      i.push true.newVal
    else:
      i.push false.newVal
  
  .symbol("number?") do (i: In):
    if i.peek.kind == minFloat or i.peek.kind == minInt:
      i.push true.newVal
    else:
      i.push false.newVal
  
  .symbol("bool?") do (i: In):
    if i.peek.kind == minBool:
      i.push true.newVal
    else:
      i.push false.newVal
  
  .symbol("quotation?") do (i: In):
    if i.peek.kind == minQuotation:
      i.push true.newVal
    else:
      i.push false.newVal

  .finalize()