fix tcompiles

tests/compile/tcompiles.nim

@@ -1,31 +1,26 @@
-discard """
-  output: '''obj has '==': false
-int has '==': true
-false
-true
-true
-no'''
-"""
-
 # test the new 'compiles' feature:
 
 template supports(opr, x: expr): bool {.immediate.} =
   compiles(opr(x)) or compiles(opr(x, x))
 
+template ok(x: expr): stmt =
+  static: assert(x)
+
+template no(x: expr): stmt =
+  static: assert(not x)
+
 type
   TObj = object
 
 var
   myObj {.compileTime.}: TObj
 
-echo "obj has '==': ", supports(`==`, myObj)
-echo "int has '==': ", supports(`==`, 45)
+ok supports(`==`, myObj)
+ok supports(`==`, 45)
 
-echo supports(`++`, 34)
-echo supports(`not`, true)
-echo supports(`+`, 34)
+no supports(`++`, 34)
+ok supports(`not`, true)
+ok supports(`+`, 34)
+
+no compiles(4+5.0 * "hallo")
 
-when compiles(4+5.0 * "hallo"):
-  echo "yes"
-else:
-  echo "no"