We need headers for bInd and std::placeholders inside bind.

kiwifb · Matthias Koeppe · commit ce15f1eaf4a0 · 2024-04-30T22:02:23.000-07:00
diff --git a/src/sage/modular/arithgroup/farey.cpp b/src/sage/modular/arithgroup/farey.cpp
@@ -736,6 +736,7 @@ size_t FareySymbol::nu3() const {
 }
 
 size_t FareySymbol::rank_pi() const {
+  using namespace std::placeholders;
   if( index() == 2 ) return 1;
   return count_if(pairing.begin(), pairing.end(),
                   bind(greater<int>(), placeholders::_1, 0))/2;

Original file line number	Diff line number	Diff line change
`@@ -736,6 +736,7 @@ size_t FareySymbol::nu3() const {`
`736`	`736`	`}`
`737`	`737`
`738`	`738`	`size_t FareySymbol::rank_pi() const {`
	`739`	`+ using namespace std::placeholders;`
`739`	`740`	`if( index() == 2 ) return 1;`
`740`	`741`	`return count_if(pairing.begin(), pairing.end(),`
`741`	`742`	`bind(greater<int>(), placeholders::_1, 0))/2;`