From 1c579b6d1584ef41e6dcf5965d4c1e7eaf97fd05 Mon Sep 17 00:00:00 2001
From: Peter Tseng <pht24@cornell.edu>
Date: Thu, 9 Nov 2017 22:44:52 -0800
Subject: [PATCH 1/2] all-your-base: Be decisive about zeroes

all-your-base 2.0.0

In https://github.com/exercism/problem-specifications/pull/280 we made
the explicit choice to leave various cases `expected: null` where tracks
can make their own decisions (leading zeroes, the representations of
zero, whether empty sequence is acceptable as input).

There are four affected cases.

https://github.com/exercism/problem-specifications/issues/473 results in
a discussion that some post-processing is necessary, based on the
decisions that a given track makes. One might even imagine that each
individual generator may have to reimplement base translation to arrive
at the proper answers for each case.

To ease the process of translation, instead we make some canonical
choices, explicitly show what the choices are, and offer that tracks may
make a different choice if desired.

A previous proposal did not receive support:
https://github.com/exercism/problem-specifications/pull/468

However, this proposal differs because it does change the comments at
the top of the file.

Closes #1002 by mutual exclusion
---
 exercises/all-your-base/canonical-data.json | 31 ++++++++-------------
 1 file changed, 11 insertions(+), 20 deletions(-)

diff --git a/exercises/all-your-base/canonical-data.json b/exercises/all-your-base/canonical-data.json
index d3ee05d277..402d62278d 100644
--- a/exercises/all-your-base/canonical-data.json
+++ b/exercises/all-your-base/canonical-data.json
@@ -1,23 +1,14 @@
 {
   "exercise": "all-your-base",
-  "version": "1.1.0",
+  "version": "2.0.0",
   "comments": [
-    "It's up to each track do decide:",
+    "This canonical data makes the following choices:",
+    "1. Zero is always represented in outputs as [0] instead of [].",
+    "2. In no other instances are leading zeroes present in any outputs.",
+    "3. Leading zeroes are accepted in inputs.",
+    "4. An empty sequence of input digits is considered zero, rather than an error.",
     "",
-    "1. What's the canonical representation of zero?",
-    " - []?",
-    " - [0]?",
-    "",
-    "2. What representations of zero are allowed?",
-    " - []?",
-    " - [0]?",
-    " - [0,0]?",
-    "",
-    "3. Are leading zeroes allowed?",
-    "",
-    "4. How should invalid input be handled?",
-    "",
-    "All the undefined cases are marked as null.",
+    "Tracks that wish to make different decisions for these choices may translate appropriately.",
     "",
     "All your numeric-base are belong to [2..]. :)"
   ],
@@ -92,7 +83,7 @@
       "input_base": 2,
       "input_digits": [],
       "output_base": 10,
-      "expected": null
+      "expected": [0]
     },
     {
       "description": "single zero",
@@ -100,7 +91,7 @@
       "input_base": 10,
       "input_digits": [0],
       "output_base": 2,
-      "expected": null
+      "expected": [0]
     },
     {
       "description": "multiple zeros",
@@ -108,7 +99,7 @@
       "input_base": 10,
       "input_digits": [0, 0, 0],
       "output_base": 2,
-      "expected": null
+      "expected": [0]
     },
     {
       "description": "leading zeros",
@@ -116,7 +107,7 @@
       "input_base": 7,
       "input_digits": [0, 6, 0],
       "output_base": 10,
-      "expected": null
+      "expected": [4, 2]
     },
     {
       "description": "first base is one",

From 89723f43c2123243ed2a234e13630243535b606c Mon Sep 17 00:00:00 2001
From: Peter Tseng <pht24@cornell.edu>
Date: Fri, 10 Nov 2017 23:57:50 -0800
Subject: [PATCH 2/2] SQUASH: 1.2.0, and merging in the other order

That means we temporarily restore the "invalids are null" text, only to
remove it in #1000
---
 exercises/all-your-base/canonical-data.json | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/exercises/all-your-base/canonical-data.json b/exercises/all-your-base/canonical-data.json
index 402d62278d..e747042374 100644
--- a/exercises/all-your-base/canonical-data.json
+++ b/exercises/all-your-base/canonical-data.json
@@ -1,6 +1,6 @@
 {
   "exercise": "all-your-base",
-  "version": "2.0.0",
+  "version": "1.2.0",
   "comments": [
     "This canonical data makes the following choices:",
     "1. Zero is always represented in outputs as [0] instead of [].",
@@ -10,6 +10,11 @@
     "",
     "Tracks that wish to make different decisions for these choices may translate appropriately.",
     "",
+    "It's up to each track do decide:",
+    "How should invalid input be handled?",
+    "",
+    "All the undefined cases are marked as null.",
+    "",
     "All your numeric-base are belong to [2..]. :)"
   ],
   "cases": [