3 files changed, 17 insertions, 0 deletions
diff --git a/src/emap/init.c b/src/emap/init.c
index 7313d74..73ea165 100644
--- a/src/emap/init.c
+++ b/src/emap/init.c
@@ -119,6 +119,7 @@ HPExport void plugin_init (void)
     addScriptCommand("failedrefindex", "i", failedRefIndex);
     addScriptCommand("downrefindex", "ii", downRefIndex);
     addScriptCommand("successrefindex", "ii", successRefIndex);
+    addScriptCommand("isstr", "v", isStr);
 
     do_init_langs();
 
diff --git a/src/emap/script.c b/src/emap/script.c
index 8c0b15c..18df0b5 100644
--- a/src/emap/script.c
+++ b/src/emap/script.c
@@ -1357,3 +1357,18 @@ BUILDIN(successRefIndex)
 
     return true;
 }
+
+// return paramater type
+// 0 - int
+// 1 - string
+// 2 - other
+BUILDIN(isStr)
+{
+    if (script_isinttype(st, 2))
+        script_pushint(st, 0);
+    else if (script_isstringtype(st, 2))
+        script_pushint(st, 1);
+    else
+        script_pushint(st, 2);
+    return true;
+}
diff --git a/src/emap/script.h b/src/emap/script.h
index 3cf023a..17518a4 100644
--- a/src/emap/script.h
+++ b/src/emap/script.h
@@ -47,5 +47,6 @@ BUILDIN(isUnitWalking);
 BUILDIN(failedRefIndex);
 BUILDIN(downRefIndex);
 BUILDIN(successRefIndex);
+BUILDIN(isStr);
 
 #endif  // EVOL_MAP_SCRIPT