Support parens in calc++.

* doc/bison.texinfo (Calc++ Scanner, Calc++ Parser): Support parens.
	* examples/calc++/test (run): Check the expected output.
	Adjust callers.
	Check parens too.

examples/calc++/test

@@ -13,17 +13,26 @@ number=1
 # Exit status of this script.
 exit=true
 
-# run EXPECTED-EXIT-STATUS [PARSER-OPTIONS]
-# -----------------------------------------
+# run EXPECTED-EXIT-STATUS EXPECTED-OUTPUT [PARSER-OPTIONS]
+# ---------------------------------------------------------
 run ()
 {
   # Effective and expected exit status.
   local sta_exp=$1
   shift
-  ./calc++ "$@" input
+  local out_exp=$1
+  shift
+  ./calc++ "$@" input >out_eff
   local sta_eff=$?
+  local out_eff=`cat out_eff`
   if test $sta_eff -eq $sta_exp; then
-    printf "$me: PASS: %2d\n" $number
+    if test "$out_eff" = "$out_exp"; then
+      printf "$me: PASS: %2d\n" $number
+    else
+      printf "$me: FAIL: %2d (expected output: %s, effective: %s\n" \
+          $number "$out_exp" "$out_eff"
+      exit=false
+    fi
   else
     printf "$me: FAIL: %2d (expected status: %d, effective: %d\n" \
         $number $sta_exp $sta_eff
@@ -39,22 +48,32 @@ c := 3
 d := a + b * c
 d
 EOF
-run 0
-run 0 -p
+run 0 7
+run 0 7 -p
+
+
+cat >input <<EOF
+a := 1
+b := 2
+c := 3
+d := (a + b) * c
+d
+EOF
+run 0 9
 
 
 cat >input <<EOF
 a := 1
 d := a + b * c
 EOF
-run 1 input
+run 1 '' input
 
 
 cat >input <<EOF
 toto := 1
 toto
 EOF
-run 0 -s
+run 0 1 -s
 
-rm input
+rm input out_eff
 $exit