TODO:

• Complex Type
  • Complex-Float
  • Complex Integer
  • Complex Rational
    • (make-rectangular 1/2 2/4)
    • (/ 10+10i 10+2i) works in Kawa (Lips convert to Float)
    • Complex NaN e.g. +nan.0+5.0i
    • Complex Infinite e.g. 3.0+inf.0i
  • Mixed complex 1/2+0.1i (all combinations)
  • Rational Complex literal
    • inexact #i1/2+2/4i -> (exact->inexact 1/2+2/4i).
  • big num complex 10e+10i.
• Float Type
• Rational
• BigInteger
• Number literals
• hex octal and binary and decimal literals (#b #o #x #d)
  • binary/hex/octal with complex and rational #b1/100 #b100+100i
• big literal numbers in scientific notation should parse as big int
• #e #i exact inexact literals that do conversion
  • #b#x #x#b replace in tokenizer (1/4 == 0.25)
  • #i#b1/100 inexact rational binary
  • big exact fractions #e1e-1000 or #e1.2e-1000
• +nan.0 and -nan.0 return by parser
• proper negative 0
• Case insensitive mnemonics
• string->number should parse all tokens #[ieoxb]
• proper casting and all combination of operations
• properly working string->number
• Unit tests for operations (all types)
  • sqrt
  • abs
    • nan
    • inf
  • /
    • nan
    • inf
  • number->string (check if they are ok)
  • string->number
  • +
    • nan
    • inf
  • -
    • nan
    • inf
  • *
    • nan
    • inf
  • modulo integer integer (test types)
  • quotient integer integer (test types)
  • reminder int int (test types)
  • max
  • min
  • gcd integer ...
  • lcm integer ...
  • exp
  • expt
  • log
  • trigonometry
    • sin
    • cos
    • tan
    • asin
    • acos
    • atan
  • round, truncate, floor, ceiling
  • positive? / negative?
  • exact->inexact
  • inexact->exact
  • comparisons < > <= >= =
    • nan
    • inf

Bugs

• atan should work on single complex number #299
• expt should work with rationals #300
• log should accept two arguments #301
• inexact->exact on complex literal without real value #340
• expt on rational values #424
• Fraction expt of negative values #426
• Comparison with +nan.0 returns #t #472