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lib/mathn.rb: remove built-in methods

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* lib/mathn.rb (Fixnum#**, Bignum#**, Float#**, Rational#**):
  remove as these are now built-in.  [ruby-core:63973] [Bug #10086]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47290 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-08-26 12:07:57 +00:00
parent 092c647cb7
commit 63683cb46d
2 changed files with 12 additions and 136 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Tue Aug 26 21:07:56 2014 gogo tanaka <mail@tanakakazuki.com>
* lib/mathn.rb (Fixnum#**, Bignum#**, Float#**, Rational#**):
remove as these are now built-in. [ruby-core:63973] [Bug #10086]
Tue Aug 26 20:46:55 2014 Tanaka Akira <akr@fsij.org>
* time.c (rb_time_unmagnify_to_float): Avoid double rounding.

143
lib/mathn.rb
View file

@ -5,9 +5,8 @@
##
# = mathn
#
# mathn is a library for changing the way Ruby does math. If you need
# more precise rounding with multiple division or exponentiation
# operations, then mathn is the right tool.
# mathn serves to make mathematical operations more precise in Ruby
# and to integrate other mathematical standard libraries.
#
# Without mathn:
#
@ -17,7 +16,7 @@
#
# 3 / 2 => 3/2 # Rational
#
# mathn features late rounding and lacks truncation of intermediate results:
# mathn keeps value in exact terms.
#
# Without mathn:
#
@ -55,7 +54,7 @@ unless defined?(Math.exp!)
end
##
# When mathn is required, Fixnum's division and exponentiation are enhanced to
# When mathn is required, Fixnum's division is enhanced to
# return more precise values from mathematical expressions.
#
# 2/3*3 # => 0
@ -71,25 +70,13 @@ class Fixnum
# 1/3 # => (1/3)
alias / quo
alias power! ** unless method_defined? :power!
##
# Exponentiate by +other+
def ** (other)
if self < 0 && other.round != other
Complex(self, 0.0) ** other
else
power!(other)
end
end
end
##
# When mathn is required Bignum's division and exponentiation are enhanced to
# When mathn is required Bignum's division is enhanced to
# return more precise values from mathematical expressions.
#
# (2**72) / ((2**70) * 3) # => 4/3
class Bignum
remove_method :/
@ -100,103 +87,6 @@ class Bignum
# (2**72) / ((2**70) * 3) # => 4/3
alias / quo
alias power! ** unless method_defined? :power!
##
# Exponentiate by +other+
def ** (other)
if self < 0 && other.round != other
Complex(self, 0.0) ** other
else
power!(other)
end
end
end
##
# When mathn is required Rational is changed to simplify the use of Rational
# operations.
#
# Normal behaviour:
#
# Rational.new!(1,3) ** 2 # => Rational(1, 9)
# (1 / 3) ** 2 # => 0
#
# require 'mathn' behaviour:
#
# (1 / 3) ** 2 # => 1/9
class Rational
remove_method :**
##
# Exponentiate by +other+
#
# (1/3) ** 2 # => 1/9
def ** (other)
if other.kind_of?(Rational)
other2 = other
if self < 0
return Complex(self, 0.0) ** other
elsif other == 0
return Rational(1,1)
elsif self == 0
return Rational(0,1)
elsif self == 1
return Rational(1,1)
end
npd = numerator.prime_division
dpd = denominator.prime_division
if other < 0
other = -other
npd, dpd = dpd, npd
end
for elm in npd
elm[1] = elm[1] * other
if !elm[1].kind_of?(Integer) and elm[1].denominator != 1
return Float(self) ** other2
end
elm[1] = elm[1].to_i
end
for elm in dpd
elm[1] = elm[1] * other
if !elm[1].kind_of?(Integer) and elm[1].denominator != 1
return Float(self) ** other2
end
elm[1] = elm[1].to_i
end
num = Integer.from_prime_division(npd)
den = Integer.from_prime_division(dpd)
Rational(num,den)
elsif other.kind_of?(Integer)
if other > 0
num = numerator ** other
den = denominator ** other
elsif other < 0
num = denominator ** -other
den = numerator ** -other
elsif other == 0
num = 1
den = 1
end
Rational(num, den)
elsif other.kind_of?(Float)
Float(self) ** other
else
x , y = other.coerce(self)
x ** y
end
end
end
##
@ -299,22 +189,3 @@ module Math
module_function :sqrt
module_function :rsqrt
end
##
# When mathn is required, Float is changed to handle Complex numbers.
class Float
alias power! **
##
# Exponentiate by +other+
def ** (other)
if self < 0 && other.round != other
Complex(self, 0.0) ** other
else
power!(other)
end
end
end