1 source [file dirname [info script]]/testing.tcl
4 needs cmd try tclcompat
6 test tailcall-1.1 {Basic tailcall} {
7 # Demo -- a tail-recursive factorial function
12 tailcall fac [expr {$x -1}] [expr {$x * $val}]
18 test tailcall-1.2 {Tailcall in try} {
20 proc a {} { upvar x x; incr x }
21 proc b {} { upvar x x; incr x 4; try { tailcall a } finally { incr x 8 }}
26 test tailcall-1.3 {Tailcall does return} {
28 proc a {} { upvar x x; incr x }
29 proc b {} { upvar x x; incr x 4; tailcall a; incr x 8}
34 test tailcall-1.4 {uplevel tailcall} {
35 proc a {} { set ::y [info level] }
36 proc b {} { set ::x [info level]; uplevel 1 tailcall a}
41 test tailcall-1.5 {interaction of uplevel and tailcall} {
46 lappend result [uplevel 1 a c]
47 lappend result [uplevel 1 a c]