diff --git a/lib/ulib/base b/lib/ulib/base
index 3513247..c8c9693 100644
--- a/lib/ulib/base
+++ b/lib/ulib/base
@@ -155,6 +155,47 @@ function _seta() {
     local __s_array="$1"; shift
     eval "$__s_array=($("$@" | qlines))"
 }
+function evalx() {
+# évaluer ...
+    local val arg r=0
+    local -a cmd
+
+    local first=1
+    while [ $# -gt 0 ]; do
+        cmd=()
+        while [ $# -gt 0 ]; do
+            arg="$1"; shift
+            [ "$arg" == // ] && break
+            if [ "${arg%//}" != "$arg" ]; then
+                local tmp="${arg%//}"
+                if [ -z "${tmp//\\/}" ]; then
+                    arg="${arg#\\}"
+                    cmd=("${cmd[@]}" "$arg")
+                    continue
+                fi
+            fi
+            cmd=("${cmd[@]}" "$arg")
+        done
+
+        if [ -n "$first" ]; then
+            val="$("${cmd[@]}")" || r=$?
+        else
+            val="$("${cmd[@]}" "$val")" || r=$?
+        fi
+        first=
+    done
+    [ -n "$val" ] && echo "$val"
+    return $r
+}
+function evalp() {
+# évaluer ...
+    :
+}
+function testx() {
+# tester ...
+    :
+}
+
 function e2of() {
 # lancer la commande $@ en redirigeant la sortie d'erreur sur la sortie standard
     "$@" 2>&1