[#54738] [ruby-trunk - Bug #8358][Open] TestSprintf#test_float test failuer on mingw32 — "phasis68 (Heesob Park)" <phasis@...>

36 messages 2013/05/02

[#54749] [ruby-trunk - Feature #8361][Open] Alternative syntax for block parameter — "alexeymuranov (Alexey Muranov)" <redmine@...>

12 messages 2013/05/02

[#54798] [ruby-trunk - Bug #8370][Open] Constants MAX_MULTIPART_LENGTH in cgi\core.rb — "xibbar (Takeyuki FUJIOKA)" <xibbar@...>

17 messages 2013/05/05

[#54850] [ruby-trunk - Feature #8377][Open] Deprecate :: for method calls in 2.1 — "charliesome (Charlie Somerville)" <charliesome@...>

27 messages 2013/05/07

[#54881] [ruby-trunk - Bug #8384][Open] Cannot build ruby against OpenSSL build with "no-ec2m" — "vo.x (Vit Ondruch)" <v.ondruch@...>

16 messages 2013/05/09

[#54921] [ruby-trunk - Bug #8393][Open] A class who's parent class is in a module can go wrong if files are required in the wrong order — "eLobato (Daniel Lobato Garcia)" <elobatocs@...>

15 messages 2013/05/12

[#54939] [ruby-trunk - Bug #8399][Open] Remove usage of RARRAY_PTR in C extensions when not needed — "dbussink (Dirkjan Bussink)" <d.bussink@...>

32 messages 2013/05/12

[#55053] [ruby-trunk - Feature #8426][Open] Implement class hierarchy method caching — "charliesome (Charlie Somerville)" <charliesome@...>

21 messages 2013/05/19

[#55096] [ruby-trunk - Feature #8430][Open] Rational number literal — "mrkn (Kenta Murata)" <muraken@...>

28 messages 2013/05/21

[#55197] [ruby-trunk - Feature #8461][Open] Easy way to disable certificate checking in XMLRPC::Client — "herwinw (Herwin Weststrate)" <herwin@...>

11 messages 2013/05/29

[ruby-core:55206] [ruby-trunk - Feature #8430] Rational number literal

From: "mrkn (Kenta Murata)" <muraken@...>
Date: 2013-05-30 13:35:23 UTC
List: ruby-core #55206
Issue #8430 has been updated by mrkn (Kenta Murata).


phluid61 (Matthew Kerwin) wrote:
> How about a different symbol?  Since (({:})) is the standard mathematical symbol for ratio, why not define (({[+-]?\d+:\d+})) as an immediate Rational, and/or (({:})) as an operator?

It collides to the conditional operator, ?:, for example:

   expr ? 1:2

As I discussed with matz and akr today, the token-level implementation of // doesn't introduce incompatibility, so it can be introduced safely.
----------------------------------------
Feature #8430: Rational number literal
https://bugs.ruby-lang.org/issues/8430#change-39568

Author: mrkn (Kenta Murata)
Status: Open
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: current: 2.1.0


I would like to propose a new literal syntax for rational numbers.
The implementation is available in my github repository:
https://github.com/mrkn/ruby/commit/8ca0c9a53593e55d67f509fc403df616e2276e3a

This patch implements a notation that consists of an integer, "//", and another integer, in a row.
The first integer is the numerator, and the second is the denominator.
Whitespaces are permitted between them.

For example:
    1 // 2 == Rational(1, 2)
    1 // 1 == Rational(1, 1)
    0 // 1 == Rational(0, 1)

"0 // 0" occurs syntax error.

I think this new syntax isn't conflict with an empty regexp
because this implementation doesn't treat // as a binary operator.



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