next steps for closure iterators

koch.nim

@@ -42,7 +42,7 @@ Possible Commands:
   csource [options]        builds the C sources for installation
   zip                      builds the installation ZIP package
   inno [options]           builds the Inno Setup installer (for Windows)
-  tests                    run the testsuite
+  tests [options]          run the testsuite
   update                   updates nimrod to the latest version from github
                            (compile koch with -d:withUpdate to enable)
   temp options             creates a temporary compiler for testing
@@ -260,11 +260,14 @@ when defined(withUpdate):
 
 # -------------- tests --------------------------------------------------------
 
+template `|`(a, b): expr = (if a.len > 0: a else: b)
+
 proc tests(args: string) =
   # we compile the tester with taintMode:on to have a basic
   # taint mode test :-)
-  exec("nimrod cc --taintMode:on tests/testament/tester")
-  exec(getCurrentDir() / "tests/testament/tester".exe & " all")
+  exec "nimrod cc --taintMode:on tests/testament/tester"
+  exec quoteShell(getCurrentDir() / "tests/testament/tester".exe) & " " &
+      (args|"all")
 
 proc temp(args: string) =
   var output = "compiler" / "nimrod".exe