lib/min_logic.nim
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import
tables,
math
import
../core/parser,
../core/value,
../core/interpreter,
../core/utils
# Comparison operators
proc logic_module*(i: In)=
let def = i.define()
def.symbol(">") do (i: In):
var n1, n2: MinValue
i.reqTwoNumbersOrStrings n2, n1
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)
else:
i.push newVal(n1.strVal > n2.strVal)
def.symbol(">=") do (i: In):
var n1, n2: MinValue
i.reqTwoNumbersOrStrings n2, n1
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)
else:
i.push newVal(n1.strVal >= n2.strVal)
def.symbol("<") do (i: In):
var n1, n2: MinValue
i.reqTwoNumbersOrStrings n1, n2
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)
else:
i.push newVal(n1.strVal > n2.strVal)
def.symbol("<=") do (i: In):
var n1, n2: MinValue
i.reqTwoNumbersOrStrings n1, n2
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)
else:
i.push newVal(n1.strVal >= n2.strVal)
def.symbol("==") do (i: In):
var n1, n2: MinValue
i.reqTwoSimilarTypesNonSymbol n2, n1
if n1.kind == minFloat or n2.kind == minFloat:
let
a:float = if n1.kind != minFloat: n1.intVal.float else: n1.floatVal
b:float = if n2.kind != minFloat: n2.intVal.float else: n2.floatVal
if a.classify == fcNan and b.classify == fcNan:
i.push newVal(true)
else:
const
FLOAT_MIN_NORMAL = 2e-1022
FLOAT_MAX_VALUE = (2-2e-52)*2e1023
epsilon = 0.00001
let
absA = abs(a)
absB = abs(b)
diff = abs(a - b)
if a == b:
i.push newVal(true)
elif a == 0 or b == 0 or diff < FLOAT_MIN_NORMAL:
i.push newVal(diff < (epsilon * FLOAT_MIN_NORMAL))
else:
i.push newVal(diff / min((absA + absB), FLOAT_MAX_VALUE) < epsilon)
else:
i.push newVal(n1 == n2)
def.symbol("!=") do (i: In):
var n1, n2: MinValue
i.reqTwoSimilarTypesNonSymbol n2, n1
i.push newVal(not (n1 == n2))
# Boolean Logic
def.symbol("not") do (i: In):
let vals = i.expect("bool")
let b = vals[0]
i.push newVal(not b.boolVal)
def.symbol("and") do (i: In):
let vals = i.expect("bool", "bool")
let a = vals[0]
let b = vals[1]
i.push newVal(a.boolVal and b.boolVal)
def.symbol("or") do (i: In):
let vals = i.expect("bool", "bool")
let a = vals[0]
let b = vals[1]
i.push newVal(a.boolVal or b.boolVal)
def.symbol("xor") do (i: In):
let vals = i.expect("bool", "bool")
let a = vals[0]
let b = vals[1]
i.push newVal(a.boolVal xor b.boolVal)
def.symbol("string?") do (i: In):
if i.peek.kind == minString:
i.push true.newVal
else:
i.push false.newVal
def.symbol("integer?") do (i: In):
if i.peek.kind == minInt:
i.push true.newVal
else:
i.push false.newVal
def.symbol("float?") do (i: In):
if i.peek.kind == minFloat:
i.push true.newVal
else:
i.push false.newVal
def.symbol("number?") do (i: In):
if i.peek.kind == minFloat or i.peek.kind == minInt:
i.push true.newVal
else:
i.push false.newVal
def.symbol("boolean?") do (i: In):
if i.peek.kind == minBool:
i.push true.newVal
else:
i.push false.newVal
def.symbol("quotation?") do (i: In):
if i.peek.kind == minQuotation:
i.push true.newVal
else:
i.push false.newVal
def.symbol("dictionary?") do (i: In):
if i.peek.isDictionary:
i.push true.newVal
else:
i.push false.newVal
def.finalize("logic")
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