use new ChainRulesCore (#319)

oxinabox · web-flow · commit cd18efb2c5f7 · 2021-06-02T14:04:55.000-04:00
diff --git a/Project.toml b/Project.toml
@@ -8,8 +8,8 @@ LogExpFunctions = "2ab3a3ac-af41-5b50-aa03-7779005ae688"
 OpenSpecFun_jll = "efe28fd5-8261-553b-a9e1-b2916fc3738e"
 
 [compat]
-ChainRulesCore = "0.9.40"
-ChainRulesTestUtils = "0.6.8"
+ChainRulesCore = "0.9.44, 0.10"
+ChainRulesTestUtils = "0.6.8, 0.7"
 LogExpFunctions = "0.2"
 OpenSpecFun_jll = "0.5"
 julia = "1.3"
diff --git a/src/chainrules.jl b/src/chainrules.jl
@@ -105,7 +105,7 @@ ChainRulesCore.@scalar_rule(
 ChainRulesCore.@scalar_rule(
     polygamma(m, x),
     (
-        ChainRulesCore.DoesNotExist(),
+        ChainRulesCore.NoTangent(),
         polygamma(m + 1, x),
     ),
 )
@@ -122,7 +122,11 @@ ChainRulesCore.@scalar_rule(
 )
 
 # actually is the absolute value of the logorithm of gamma paired with sign gamma
-ChainRulesCore.@scalar_rule(logabsgamma(x), digamma(x), ChainRulesCore.Zero())
+ChainRulesCore.@scalar_rule(
+    logabsgamma(x),
+    digamma(x),
+    ChainRulesCore.ZeroTangent()
+)
 
 ChainRulesCore.@scalar_rule(loggamma(x), digamma(x))
 ChainRulesCore.@scalar_rule(

Original file line number	Diff line number	Diff line change
`@@ -105,7 +105,7 @@ ChainRulesCore.@scalar_rule(`
`105`	`105`	`ChainRulesCore.@scalar_rule(`
`106`	`106`	`polygamma(m, x),`
`107`	`107`	`(`
`108`		`- ChainRulesCore.DoesNotExist(),`
	`108`	`+ ChainRulesCore.NoTangent(),`
`109`	`109`	`polygamma(m + 1, x),`
`110`	`110`	`),`
`111`	`111`	`)`
`@@ -122,7 +122,11 @@ ChainRulesCore.@scalar_rule(`
`122`	`122`	`)`
`123`	`123`
`124`	`124`	`# actually is the absolute value of the logorithm of gamma paired with sign gamma`
`125`		`-ChainRulesCore.@scalar_rule(logabsgamma(x), digamma(x), ChainRulesCore.Zero())`
	`125`	`+ChainRulesCore.@scalar_rule(`
	`126`	`+ logabsgamma(x),`
	`127`	`+ digamma(x),`
	`128`	`+ ChainRulesCore.ZeroTangent()`
	`129`	`+)`
`126`	`130`
`127`	`131`	`ChainRulesCore.@scalar_rule(loggamma(x), digamma(x))`
`128`	`132`	`ChainRulesCore.@scalar_rule(`