Remove lastElem

ast/pos.go

@@ -39,7 +39,7 @@ func (c *CTE) End() token.Pos { return c.Rparen + 1 }
 func (s *Select) Pos() token.Pos { return s.Select }
 
 func (s *Select) End() token.Pos {
-	return firstValidEnd(s.Limit, s.OrderBy, s.Having, s.GroupBy, s.Where, s.From, lastElem(s.Results))
+	return firstValidEnd(s.Limit, s.OrderBy, s.Having, s.GroupBy, s.Where, s.From, s.Results[len(s.Results)-1])
 }
 
 func (c *CompoundQuery) Pos() token.Pos {

ast/util.go

@@ -52,12 +52,6 @@ func sqlJoin[T Node](elems []T, sep string) string {
 
 // Helper functions for Pos(), End()
 
-// lastElem returns last element of slice s.
-// This function corresponds to NodeSliceVar[$] in ast.go.
-func lastElem[T any](s []T) T {
-	return s[len(s)-1]
-}
-
 // firstValidEnd returns the first valid Pos() in argument.
 // "valid" means the node is not nil and Pos().Invalid() is not true.
 // This function corresponds to "(n0 ?? n1 ?? ...).End()"
@@ -87,5 +81,5 @@ func lastEnd[T Node](s []T) token.Pos {
 	if len(s) == 0 {
 		return token.InvalidPos
 	}
-	return lastElem(s).End()
+	return s[len(s)-1].End()
 }