Module: Precision

Precision is a mixin for concrete numeric classes with precision. Here, `precision’ means the fineness of approximation of a real number, so, this module should not be included into anything which is not a subset of Real (so it should not be included in classes such as Complex or Matrix).

Methods

included prec prec_f prec_i

Public Class methods

included(p1)

call_seq:

  included

When the Precision module is mixed-in to a class, this included method is used to add our default induced_from implementation to the host class.

Public Instance methods

num.prec(klass) => a_klass

Converts self into an instance of klass. By default, prec invokes

   klass.induced_from(num)

and returns its value. So, if klass.induced_from doesn’t return an instance of klass, it will be necessary to reimplement prec.

num.prec_f => Integer

Returns an Float converted from num. It is equivalent to prec(Float).

num.prec_i => Integer

Returns an Integer converted from num. It is equivalent to prec(Integer).