core: support integer expressions in various commands

For convenience, many commands now accept integer expressions
rather than only simple integers.

These are:

    loop, range, incr, string repeat, lrepeat, pack, unpack, rand

This simplifies many cases where previously expr {} or $() was required.
e.g.

    foreach i [range 4+1 2*$b] { ... }
    string repeat 2**$n a

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/dict2.test b/tests/dict2.test
index 493cf91..2a36dc1 100644
--- a/tests/dict2.test
+++ b/tests/dict2.test
@@ -316,14 +316,14 @@ test dict-11.9 {dict incr command} -returnCodes error -body {
 	dict-sort $dictv
 } -cleanup {
     unset dictv
-} -result {expected integer but got "dummy"}
+} -match glob -result {expected integer *but got "dummy"}
 test dict-11.10 {dict incr command} -returnCodes error -body {
     set dictv {a 1}
     dict incr dictv a dummy
 	dict-sort $dictv
 } -cleanup {
     unset dictv
-} -result {expected integer but got "dummy"}
+} -match glob -result {expected integer *but got "dummy"}
 test dict-11.11 {dict incr command} -setup {
     unset -nocomplain dictv
 } -body {