tpl: Modify error messages of after, first, and last

Modified the messages functions after, first, and last threw on being passed invalid parameters (index or limit) to be more standardised and resemble what Go compiler would throw.

Fixes #6415

diff --git a/tpl/collections/collections.go b/tpl/collections/collections.go
index 95079436fde618fdb8b6e42b91b3718b02a1370d..df8aaa6c7dbd54070e302d52b461548a7f6a2108 100644 (file)
--- a/tpl/collections/collections.go
+++ b/tpl/collections/collections.go
@@ -61,7 +61,7 @@ func (ns *Namespace) After(index interface{}, seq interface{}) (interface{}, err
        }
 
        if indexv < 0 {
-               return nil, errors.New("can't return negative/empty count of items from sequence")
+               return nil, errors.New("sequence bounds out of range [" + cast.ToString(indexv) + ":]")
        }
 
        seqv := reflect.ValueOf(seq)
@@ -219,7 +219,7 @@ func (ns *Namespace) First(limit interface{}, seq interface{}) (interface{}, err
        }
 
        if limitv < 0 {
-               return nil, errors.New("can't return negative count of items from sequence")
+               return nil, errors.New("sequence length must be non-negative")
        }
 
        seqv := reflect.ValueOf(seq)
@@ -379,7 +379,7 @@ func (ns *Namespace) Last(limit interface{}, seq interface{}) (interface{}, erro
        }
 
        if limitv < 0 {
-               return nil, errors.New("can't return negative/empty count of items from sequence")
+               return nil, errors.New("sequence length must be non-negative")
        }
 
        seqv := reflect.ValueOf(seq)