Update src/rule_definition_tools.jl

Co-authored-by: Lyndon White <oxinabox@ucc.asn.au>
JuliaDiff · May 27, 2021 · 08453d5 · 08453d5
1 parent 4ca0f15
commit 08453d5
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/rule_definition_tools.jl b/src/rule_definition_tools.jl
@@ -56,7 +56,8 @@ derivative/setup expressions.
 This macro assumes complex functions are holomorphic. In general, for non-holomorphic
 functions, the `frule` and `rrule` must be defined manually.
 
-Prefer using `true` over `1.0` to express multiplicative identity.
+If the derivative is one, (e.g. for identity functions) `true` can be used as the most 
+general multiplicative identity.
 
 The `@setup` argument can be elided if no setup code is need. In other
 words: