Update stan/math/prim/prob/yule_simon_lccdf.hpp

lingium · SteveBronder · web-flow · commit 72d4ba817c15 · 2025-09-26T13:39:31.000+08:00
Co-authored-by: Steve Bronder &lt;Stevo15025@gmail.com&gt;
diff --git a/stan/math/prim/prob/yule_simon_lccdf.hpp b/stan/math/prim/prob/yule_simon_lccdf.hpp
@@ -72,8 +72,7 @@ inline return_type_t<T_alpha> yule_simon_lccdf(const T_n& n,
     log_ccdf += lgamma(ap1) + lgamma(np1) - lgamma(nap1);
 
     if constexpr (!is_constant<T_alpha>::value) {
-      auto dlogccdf_dalpha = digamma(ap1) - digamma(nap1);
-      partials<0>(ops_partials)[i] += dlogccdf_dalpha;
+      partials<0>(ops_partials)[i] += digamma(ap1) - digamma(nap1);
     }
   }
 

Original file line number	Diff line number	Diff line change
`@@ -72,8 +72,7 @@ inline return_type_t<T_alpha> yule_simon_lccdf(const T_n& n,`
`72`	`72`	`log_ccdf += lgamma(ap1) + lgamma(np1) - lgamma(nap1);`
`73`	`73`
`74`	`74`	`if constexpr (!is_constant<T_alpha>::value) {`
`75`		`- auto dlogccdf_dalpha = digamma(ap1) - digamma(nap1);`
`76`		`- partials<0>(ops_partials)[i] += dlogccdf_dalpha;`
	`75`	`+ partials<0>(ops_partials)[i] += digamma(ap1) - digamma(nap1);`
`77`	`76`	`}`
`78`	`77`	`}`
`79`	`78`