From 2462184c64a201ac159c5618d9aa10ac794dfb97 Mon Sep 17 00:00:00 2001
From: Shuhei Kadowaki <aviatesk@gmail.com>
Date: Thu, 13 Jul 2023 23:31:17 +0900
Subject: [PATCH] add .gitattributes to ignore changes in Manifest.toml

---
 .gitattributes |  1 +
 test/rules.jl  | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 .gitattributes
 create mode 100644 test/rules.jl

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..233a73cc
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+Manifest.toml linguist-generated=true
diff --git a/test/rules.jl b/test/rules.jl
new file mode 100644
index 00000000..71328c5e
--- /dev/null
+++ b/test/rules.jl
@@ -0,0 +1,40 @@
+module rules
+
+using Test, Diffractor, ChainRulesCore
+using Diffractor: var"'"
+
+# invalidation for rrule
+rrule_demo(x) = sin(x)
+function rrule_demo_pullback(x)
+    return function (Δx)
+        return NoTangent(), Δx*cos(x)
+    end
+end
+function ChainRulesCore.rrule(::typeof(rrule_demo), x)
+    return rrule_demo(x), rrule_demo_pullback(x)
+end
+@test cos(42) == rrule_demo'(42)
+function rrule_demo_pullback(x)
+    return function (Δx)
+        return NoTangent(), Δx*sin(x)
+    end
+end
+@test sin(42) == rrule_demo'(42)
+
+# invalidation for frule
+frule_demo(x) = sin(x)
+function frule_demo_impl(Δx, x)
+    sinx, cosx = sincos(x)
+    return (sinx, sinx * Δx)
+end
+function ChainRulesCore.frule((_, Δx), ::typeof(frule_demo), x)
+    return frule_demo_impl(Δx, x)
+end
+@test cos(42) == frule_demo'(42)
+function frule_demo_impl(Δx, x)
+    sinx, cosx = sincos(x)
+    return (sinx, sinx * Δx)
+end
+@test sin(42) == frule_demo'(42)
+
+end # module rules