[Bug #3137] complex.rb changes exceptions of Math

Bug #3137: complex.rb changes exceptions of Math
http://redmine.ruby-lang.org/issues/show/3137

e$B5/I<<Te(B: Yusuke E.
e$B%9%F!<%?%9e(B: Open, e$BM%@hEYe(B: Normal
e$BC4Ev<Te(B: Keiju Ishitsuka, e$B%+%F%4%je(B: lib, Target version:
1.9.2
ruby -v: ruby 1.9.2dev (2010-04-12 trunk 27317) [i686-linux]

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require e$B$9$k$He(B
Math.atan(nil) e$B$GEj$2$i$l$kNc30$,JQ$o$k!W$H$$$&Js9p$r$7$F$$$^$9!#e(B

$ ./ruby -e ‘p Math.atanh(nil)’
-e:1:in atanh': can't convert nil into Float (TypeError) from -e:1:in

$ ./ruby -rcomplex -e ‘p Math.atanh(nil)’
/home/mame/work/ruby-trunk-local/lib/ruby/1.9.1/cmath.rb:196:in
atanh': undefined methodreal?’ for nil:NilClass (NoMethodError)
from -e:1:in `’

Ruby e$B%l%Y%k$N%i%$%V%i%j$Oe(B duck typing
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e$B$D$$$G$G$9$,!"e(B[ruby-dev:40953] e$B$b8+$F$/[email protected]$5$$!#e(B

diff --git a/lib/cmath.rb b/lib/cmath.rb
index b23dac2…aa2d9bb 100644
— a/lib/cmath.rb
+++ b/lib/cmath.rb
@@ -27,6 +27,7 @@ module CMath
alias atanh! atanh

def exp(z)

  • z = Float(z)
    if z.real?
    exp!(z)
    else
    @@ -36,9 +37,9 @@ module CMath
    end
    end
  • def log(*args)
  • z, b = args
  • if z.real? and z >= 0 and (b.nil? or b >= 0)
  • def log(z, b = nil)
  • z = Float(z)
  • if z.real? and z >= 0 and (b.nil? or (b = Float(b); b >= 0))
    log!(*args)
    else
    a = Complex(log!(z.abs), z.arg)
    @@ -50,6 +51,7 @@ module CMath
    end

def log2(z)

  • z = Float(z)
    if z.real? and z >= 0
    log2!(z)
    else
    @@ -58,6 +60,7 @@ module CMath
    end

def log10(z)

  • z = Float(z)
    if z.real? and z >= 0
    log10!(z)
    else
    @@ -66,6 +69,7 @@ module CMath
    end

def sqrt(z)

  • z = Float(z)
    if z.real?
    if z < 0
    Complex(0, sqrt!(-z))
    @@ -85,6 +89,7 @@ module CMath
    end

def cbrt(z)

  • z = Float(z)
    if z.real? and z >= 0
    cbrt!(z)
    else
    @@ -93,6 +98,7 @@ module CMath
    end

def sin(z)

  • z = Float(z)
    if z.real?
    sin!(z)
    else
    @@ -102,6 +108,7 @@ module CMath
    end

def cos(z)

  • z = Float(z)
    if z.real?
    cos!(z)
    else
    @@ -111,6 +118,7 @@ module CMath
    end

def tan(z)

  • z = Float(z)
    if z.real?
    tan!(z)
    else
    @@ -119,6 +127,7 @@ module CMath
    end

def sinh(z)

  • z = Float(z)
    if z.real?
    sinh!(z)
    else
    @@ -128,6 +137,7 @@ module CMath
    end

def cosh(z)

  • z = Float(z)
    if z.real?
    cosh!(z)
    else
    @@ -137,6 +147,7 @@ module CMath
    end

def tanh(z)

  • z = Float(z)
    if z.real?
    tanh!(z)
    else
    @@ -145,6 +156,7 @@ module CMath
    end

def asin(z)

  • z = Float(z)
    if z.real? and z >= -1 and z <= 1
    asin!(z)
    else
    @@ -153,6 +165,7 @@ module CMath
    end

def acos(z)

  • z = Float(z)
    if z.real? and z >= -1 and z <= 1
    acos!(z)
    else
    @@ -161,6 +174,7 @@ module CMath
    end

def atan(z)

  • z = Float(z)
    if z.real?
    atan!(z)
    else
    @@ -169,6 +183,7 @@ module CMath
    end

def atan2(y,x)

  • x, y = Float(x), Float(y)
    if y.real? and x.real?
    atan2!(y,x)
    else
    @@ -177,6 +192,7 @@ module CMath
    end

def asinh(z)

  • z = Float(z)
    if z.real?
    asinh!(z)
    else
    @@ -185,6 +201,7 @@ module CMath
    end

def acosh(z)

  • z = Float(z)
    if z.real? and z >= 1
    acosh!(z)
    else
    @@ -193,6 +210,7 @@ module CMath
    end

def atanh(z)

  • z = Float(z)
    if z.real? and z >= -1 and z <= 1
    atanh!(z)
    else


Yusuke E. [email protected]

e$B%A%1%C%He(B #3137 e$B$,99?7$5$l$^$7$?!#e(B (by Marc-Andre L.)

A problem with the patch is that Float(“1.1”) returns 1.1.

In my todo list is “propose strict coercion methods”… I had to code
them up in Matrix

http://redmine.ruby-lang.org/issues/show/3137

e$B%A%1%C%He(B #3137 e$B$,99?7$5$l$^$7$?!#e(B (by Yusuke E.)

Target version 1.9.2e$B$+$ie(B1.9.xe$B$KJQ99e(B

Hi,

2010e$BG/e(B4e$B7ne(B12e$BF|e(B23:41 Marc-Andre L.
[email protected]:

A problem with the patch is that Float(“1.1”) returns 1.1.

In my todo list is “propose strict coercion methods”… I had to code them up in Matrix

Oh, you are right. Thanks.

I guess “strict coercion” will be good, but it is absolutely new
feature. So, let’s leave #2756 and this ticket to 1.9.3 (or later).


Yusuke ENDOH [email protected]

http://redmine.ruby-lang.org/issues/show/3137

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In the message: “[Bug #3137] complex.rb changes exceptions of Math”,
on Apr/12 23:01(JST) Yusuke E. writes:

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-e:1:in `atanh’: can’t convert nil into Float (TypeError)

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In message “Re: [ruby-dev:40967] Re: [Bug #3137] complex.rb changes
exceptions of Math”
on Tue, 13 Apr 2010 14:56:59 +0900, [email protected]
([email protected]=<ye(B) writes:

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|
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|
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In [ruby-dev:40968] the message: “[ruby-dev:40968] Re: [Bug #3137]
complex.rb changes exceptions of Math”, on Apr/13 15:19(JST) Yukihiro
Matsumoto writes:

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

|[email protected](B, Complex#atanhe$BEy$Ge(B,
|> -e:1:in `atanh’: can’t convert nil into Float (TypeError)
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def exp(z)
begin
if z.real?
exp!(z)
else
ere = exp!(z.real)
Complex(ere * cos!(z.imag),
ere * sin!(z.imag))
end
rescue NoMethodError => exp
if exp.name == :real?
raise “error”
end
raise
end
end

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|> -e:1:in `atanh’: can’t convert nil into Float (TypeError)

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def exp(z)
begin
if z.real?
exp!(z)
else
ere = exp!(z.real)
Complex(ere * cos!(z.imag),
ere * sin!(z.imag))
end
rescue NoMethodError => exp
if exp.name == :real?
return exp(Float(z))
end
raise
end
end

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In message “Re: [ruby-dev:40969] Re: [Bug #3137] complex.rb changes
exceptions of Math”
on Tue, 13 Apr 2010 16:30:38 +0900, [email protected]
([email protected]=<ye(B) writes:

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| end
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In message “Re: [ruby-dev:40971] Re: [Bug #3137] complex.rb changes
exceptions of Math”
on Tue, 13 Apr 2010 17:05:17 +0900, [email protected]
([email protected]=<ye(B) writes:

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In [ruby-dev:40970] the message: “[ruby-dev:40970] Re: [Bug #3137]
complex.rb changes exceptions of Math”, on Apr/13 16:47(JST) Yukihiro
Matsumoto writes:

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def exp(z)
begin
if z.real?
exp!(z)
else
ere = exp!(z.real)
Complex(ere * cos!(z.imag),
ere * sin!(z.imag))
end
rescue NoMethodError => exp
if exp.name == :real?
return exp!(z)
end
raise
end
end

e$B$G$7$?e(B.

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e$B7=<ye(B <<—
---------------------------------->> e-mail: [email protected] <<—

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2010e$BG/e(B4e$B7ne(B13e$BF|e(B17:11 Yukihiro M.
[email protected]:

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def tolerant_exp(x)
begin
Math.exp(x)
rescue TypeError
0
end
end

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2010e$BG/e(B4e$B7ne(B13e$BF|e(B22:42 Yusuke ENDOH [email protected]:

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In [ruby-dev:40974] the message: “[ruby-dev:40974] Re: [Bug #3137]
complex.rb changes exceptions of Math”, on Apr/13 22:42(JST) Yusuke
ENDOH writes:

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Hi,

2010/4/14 Yusuke ENDOH [email protected]:

メンテナがいないのであれば、Marc-Andre がそのうち引き取って
くれそうな気がするので、それでもいいかなと思いました。

I’ll gladly maintain cmath if it can help.

Thanks,

Marc-André

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2010e$BG/e(B4e$B7ne(B14e$BF|e(B13:32 [email protected]=<ye(B
[email protected]:

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http://redmine.ruby-lang.org/issues/show/3137

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