Variable floatConst

Parse floats.

Remarks

Example

  run(float("123"))       => Ok(123)
  run(float("3.1415"))    => Ok(3.1415)
  run(float("0.1234"))    => Ok(0.1234)
  run(float(".1234"))     => Ok(0.1234)
  run(float("1e-42"))     => Ok(1e-42)
  run(float("6.022e23"))  => Ok(6.022e23)
  run(float("6.022E23"))  => Ok(6.022e23)
  run(float("6.022e+23")) => Ok(6.022e23)

If you want to disable literals like .123 (like in Elm) you could write something like this:

  elmFloat : Parser Float
  elmFloat =
    oneOf
      [ symbol "."
          |. problem "floating point numbers must start with a digit, like 0.25"
      , float
      ]

Note: If you want a parser for both Int and Float literals, check out number below. It will be faster than using oneOf to combining int and float yourself.