From: demoonlit@... Date: 2017-01-25T00:54:45+00:00 Subject: [ruby-core:79250] [Ruby trunk Bug#13152] Numeric parsing differences between ruby <-> crystal Issue #13152 has been updated by yuta tomino. Ada ~~~ with Ada.Integer_Text_IO; procedure pow is begin Ada.Integer_Text_IO.Put (-2 ** 4); end; ~~~ -16 ---------------------------------------- Bug #13152: Numeric parsing differences between ruby <-> crystal https://bugs.ruby-lang.org/issues/13152#change-62664 * Author: Jabari Zakiya * Status: Rejected * Priority: Normal * Assignee: * Target version: * ruby -v: * Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN ---------------------------------------- I noticed this difference between ruby and crystal when converting a gem. ```ruby puts -2**4 -> -16 (ruby) || 16 (crystal) puts (-2)**4 -> 16 (both) ``` ruby parses `-2**4` as `-(2**4)`, while crystal does `(-2)**4`, which is more intuitive. This creates need to be careful converting negative number usage from ruby <-> crystal. (I haven't investigated differences with other languages.) Using parentheses to explicitly create intended outcomes can overcome this. However, on the heels of the discussion/decision to not change the default rounding behavior of numerics in 2.4.0 would it also be worth it to change this parsing behavior to make this more natural and intuitive, as in crystal? -- https://bugs.ruby-lang.org/ Unsubscribe: