Test results covering change: Let expressions now in XPath

 X LetExpr001:

let $x := "92233720368547758" return $x

 X LetExpr002:

let $x := 92233720368547758 return $x

 X LetExpr003:

let $x := 92233720368547758+1 return $x

 X LetExpr004:

let $x := xs:long("92233720368547758") return $x

 X LetExpr005:

let $x := xs:long("-92233720368547758")+1 return $x

 X LetExpr006:

let $x := xs:double("1.7976931348623157E308") return $x

 X LetExpr008:

let $x:=1, $y:=$x+1 return $x

 X LetExpr010:

let $x:=(1,2,3), $y:=$x+1 return $y

 X LetExpr011:

let $x :=(1 to 100)[. mod 5 eq 0] return $x

 X LetExpr012:

let $x :=(1 to 100)[. mod 5 eq 0], $y := $x[. mod 10 eq 0] return $y

 X LetExpr013:

let $x:="hello", $y:=concat($x," there") return $y

 X LetExpr014:

let $x := "1", $y := $x+1 return $y

 X LetExpr015:

let $x := (0,0.1e-1,2.0,'a',"cat",'',true()) return $x

 X LetExpr020a:

let $a := 1 let $b := $a let $c := $a+$b return ($c)

 X LetExpr021:

let $a := $b return ($a)

 X K-LetExprWithout-1:

let $i := 5, $j := 20 * $i return $i, $j

 X K-LetExprWithout-2:

let $i = 5 return 3

 X K-LetExprWithout-3:

let $i in 5 return 3

 X K2-LetExprWithout-25:

let $a := 1 return for $b in 1 return if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else if ($b) then 1 else ()

 X xquery10keywords2:

let $x := (/) return $x /ancestor-or-self /ancestor /and /as /ascending /at /attribute /base-uri /boundary-space /by /case /cast /castable /child /collation /comment /construction /copy-namespaces /declare /default /descendant-or-self /descendant /descending /div /document-node /document /element /else /empty-sequence /empty /encoding /eq /every /except /external /following-sibling /following /for /function /ge /greatest /gt /idiv /if /import /in /inherit /instance /intersect /is /item /lax /le /least /let /lt /mod /module /module /namespace /ne /no-inherit /no-preserve /node /of /option /or /order /ordered /ordering /parent /preceding-sibling /preceding /preserve /processing-instruction /return /satisfies /schema-attribute /schema-element /schema /self /some /stable /strict /strip /text /then /to /treat /typeswitch /union /unordered /validate /variable /version /where /xquery

 X xquery30keywords2:

let $x := (/) return $x /NaN /allowing /ancestor-or-self /ancestor /and /as /ascending /at /attribute /base-uri /boundary-space /by /case /cast /castable /catch /child /collation /comment /construction /context /copy-namespaces /count /decimal-format /decimal-separator /declare /default /descendant-or-self /descendant /descending /digit /div /document-node /document /element /else /empty-sequence /empty /encoding /end /eq /every /except /external /following-sibling /following /for /function /ge /greatest /group /grouping-separator /gt /idiv /if /import /in /infinity /inherit /instance /intersect /is /item /lax /le /least /let /lt /minus-sign /mod /module /namespace-node /namespace /ne /next /no-inherit /no-preserve /node /of /only /option /or /order /ordered /ordering /parent /pattern-separator /per-mille /percent /preceding-sibling /preceding /preserve /previous /processing-instruction /return /satisfies /schema-attribute /schema-element /schema /self /sliding /some /stable /start /strict /strip /switch /text /then /to /treat /try /tumbling /type /typeswitch /union /unordered /validate /variable /version /when /where /window /xquery /zero-digit