data.list.destutter | Mathlib porting status

Changes since the initial port

The following section lists changes to this file in mathlib3 and mathlib4 that occured after the initial port. Most recent changes are shown first. Hovering over a commit will show all commits associated with the same mathlib3 commit.

Changes in mathlib3

7b78d177

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

f2f413b9

bump to nightly-2023-09-24-06

mathlib commit https://github.com/leanprover-community/mathlib/commit/ce64cd319bb6b3e82f31c2d38e79080d377be451

5655435f

Diff

@@ -3,7 +3,7 @@ Copyright (c) 2022 Eric Rodriguez. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Eric Rodriguez, Eric Wieser
 -/
-import Mathbin.Data.List.Chain
+import Data.List.Chain
 
 #align_import data.list.destutter from "leanprover-community/mathlib"@"f2f413b9d4be3a02840d0663dace76e8fe3da053"

f2f413b9

bump to nightly-2023-07-20-09

mathlib commit https://github.com/leanprover-community/mathlib/commit/8ea5598db6caeddde6cb734aa179cc2408dbd345

9c56d0dd

Diff

@@ -2,14 +2,11 @@
 Copyright (c) 2022 Eric Rodriguez. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Eric Rodriguez, Eric Wieser
-
-! This file was ported from Lean 3 source module data.list.destutter
-! leanprover-community/mathlib commit f2f413b9d4be3a02840d0663dace76e8fe3da053
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Data.List.Chain
 
+#align_import data.list.destutter from "leanprover-community/mathlib"@"f2f413b9d4be3a02840d0663dace76e8fe3da053"
+
 /-!
 # Destuttering of Lists

f2f413b9

bump to nightly-2023-05-28-04

mathlib commit https://github.com/leanprover-community/mathlib/commit/917c3c072e487b3cccdbfeff17e75b40e45f66cb

6797a637

Diff

@@ -138,9 +138,7 @@ theorem destutter'_of_chain (h : l.Chain R a) : l.destutter' R a = a :: l :=
 #print List.destutter'_eq_self_iff /-
 @[simp]
 theorem destutter'_eq_self_iff (a) : l.destutter' R a = a :: l ↔ l.Chain R a :=
-  ⟨fun h => by
-    rw [← chain', ← h]
-    exact l.destutter'_is_chain' R a, destutter'_of_chain _ _⟩
+  ⟨fun h => by rw [← chain', ← h]; exact l.destutter'_is_chain' R a, destutter'_of_chain _ _⟩
 #align list.destutter'_eq_self_iff List.destutter'_eq_self_iff
 -/

f2f413b9

bump to nightly-2023-02-21-16

mathlib commit https://github.com/leanprover-community/mathlib/commit/bd9851ca476957ea4549eb19b40e7b5ade9428cc

1107b979

Changes in mathlib4

mathlib3

mathlib4

7b78d177

chore: banish Type _ and Sort _ (#6499)

We remove all possible occurences of Type _ and Sort _ in favor of Type* and Sort*.

This has nice performance benefits.

32de3f67

Diff

@@ -28,7 +28,7 @@ adjacent, chain, duplicates, remove, list, stutter, destutter
 -/
 
 
-variable {α : Type _} (l : List α) (R : α → α → Prop) [DecidableRel R] {a b : α}
+variable {α : Type*} (l : List α) (R : α → α → Prop) [DecidableRel R] {a b : α}
 
 namespace List

7b78d177

chore: script to replace headers with #align_import statements (#5979)

depends on: #5966

Co-authored-by: Eric Wieser <wieser.eric@gmail.com> Co-authored-by: Scott Morrison <scott.morrison@gmail.com>

89aa3a3b

Diff

@@ -2,14 +2,11 @@
 Copyright (c) 2022 Eric Rodriguez. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Eric Rodriguez, Eric Wieser
-
-! This file was ported from Lean 3 source module data.list.destutter
-! leanprover-community/mathlib commit 7b78d1776212a91ecc94cf601f83bdcc46b04213
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Data.List.Chain
 
+#align_import data.list.destutter from "leanprover-community/mathlib"@"7b78d1776212a91ecc94cf601f83bdcc46b04213"
+
 /-!
 # Destuttering of Lists

7b78d177

chore: format by line breaks (#1523)

During porting, I usually fix the desired format we seem to want for the line breaks around by with

awk '{do {{if (match($0, "^  by$") && length(p) < 98) {p=p " by";} else {if (NR!=1) {print p}; p=$0}}} while (getline == 1) if (getline==0) print p}' Mathlib/File/Im/Working/On.lean

I noticed there are some more files that slipped through.

This pull request is the result of running this command:

grep -lr "^  by\$" Mathlib | xargs -n 1 awk -i inplace '{do {{if (match($0, "^  by$") && length(p) < 98 && not (match(p, "^[ \t]*--"))) {p=p " by";} else {if (NR!=1) {print p}; p=$0}}} while (getline == 1) if (getline==0) print p}'

Co-authored-by: Moritz Firsching <firsching@google.com>

d6d859a7

Diff

@@ -64,8 +64,7 @@ theorem destutter'_singleton : [b].destutter' R a = if R a b then [a, b] else [a
   split_ifs with h <;> simp! [h]
 #align list.destutter'_singleton List.destutter'_singleton
 
-theorem destutter'_sublist (a) : l.destutter' R a <+ a :: l :=
-  by
+theorem destutter'_sublist (a) : l.destutter' R a <+ a :: l := by
   induction' l with b l hl generalizing a
   · simp
   rw [destutter']
@@ -74,8 +73,7 @@ theorem destutter'_sublist (a) : l.destutter' R a <+ a :: l :=
   · exact (hl a).trans ((l.sublist_cons b).cons_cons a)
 #align list.destutter'_sublist List.destutter'_sublist
 
-theorem mem_destutter' (a) : a ∈ l.destutter' R a :=
-  by
+theorem mem_destutter' (a) : a ∈ l.destutter' R a := by
   induction' l with b l hl
   · simp
   rw [destutter']
@@ -94,8 +92,7 @@ theorem destutter'_is_chain : ∀ l : List α, ∀ {a b}, R a b → (l.destutter
     · exact destutter'_is_chain l h
 #align list.destutter'_is_chain List.destutter'_is_chain
 
-theorem destutter'_is_chain' (a) : (l.destutter' R a).Chain' R :=
-  by
+theorem destutter'_is_chain' (a) : (l.destutter' R a).Chain' R := by
   induction' l with b l hl generalizing a
   · simp
   rw [destutter']
@@ -104,8 +101,7 @@ theorem destutter'_is_chain' (a) : (l.destutter' R a).Chain' R :=
   · exact hl a
 #align list.destutter'_is_chain' List.destutter'_is_chain'
 
-theorem destutter'_of_chain (h : l.Chain R a) : l.destutter' R a = a :: l :=
-  by
+theorem destutter'_of_chain (h : l.Chain R a) : l.destutter' R a = a :: l := by
   induction' l with b l hb generalizing a
   · simp
   obtain ⟨h, hc⟩ := chain_cons.mp h

7b78d177

feat: Port/data.list.destutter (#1466)

feat: Port/Data.List.Destutter

Co-authored-by: Moritz Firsching <firsching@google.com>

c15ba021

`data.list.destutter` ⟷ `Mathlib.Data.List.Destutter`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 2 + 92

data.list.destutter ⟷ Mathlib.Data.List.Destutter

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 2 + 92

`data.list.destutter` ⟷ `Mathlib.Data.List.Destutter`