Adjusted the examples for zaach#205/342 to showcase the latest kernel…

… optimizations too: when there's no match, i.e. a parse error, then the parser still invokes `parseError()` like in the old days and has it throw an exception if you don't override it, but you can also make it return `false` to turn the parser into a true *matcher*, returning `true` or `false` whether the input parses correctly or not! See examples/issue-205-2.jison.

examples/issue-205-2.jison

@@ -18,6 +18,7 @@ X                     return 'COMMON1';
 /lex
 
 
+%options no-default-action no-try-catch
 
 
 %token PREFIX1 PREFIX2 SUFFIX1 SUFFIX2
@@ -70,6 +71,33 @@ parser.main = function () {
         }
     }
 
+
+    console.log("\nAnd now the failing inputs: even these deliver a result:\n");
+
+
+    // set up an aborting error handler which does not throw an exception
+    // but returns a special parse 'result' instead:
+    var errmsg = null;
+    var errReturnValue = false;
+    parser.yy.parseError = function (msg, hash) {
+        errmsg = msg;
+        return errReturnValue;
+    };
+
+    var testset_not_ok = ['a', 'b', 'aB', 'bA', '?', 'AA', 'BB', 'aa', 'bb', '?A', '?a'];
+    var base = i;
+    var rv;
+    for (var i = 0, len = testset_not_ok.length; i < len; i++) {
+        try {
+            rv = parser.parse(testset_not_ok[i]);
+            console.log("test #" +  (base + i) + ": '" +  testset_not_ok[i] + "' ==> ", rv);
+            assert.strictEqual(rv, errReturnValue);
+        } catch (ex) {
+            console.log("test #" +  (base + i) + ": '" +  testset_not_ok[i] + "' ==> EXCEPTION: ", ex);
+            throw ex;
+        }
+    }
+
     // if you get past the assert(), you're good.
     console.log("tested OK");
 };

examples/issue-205.jison

@@ -14,6 +14,7 @@ B                     return 'SUFFIX2';
 /lex
 
 
+%options no-default-action no-try-catch
 
 
 %token PREFIX1 PREFIX2 SUFFIX1 SUFFIX2
@@ -66,6 +67,33 @@ parser.main = function () {
         }
     }
 
+
+    console.log("\nAnd now the failing inputs: even these deliver a result:\n");
+
+
+    // set up an aborting error handler which does not throw an exception
+    // but returns a special parse 'result' instead:
+    var errmsg = null;
+    var errReturnValue = '@@@';
+    parser.yy.parseError = function (msg, hash) {
+        errmsg = msg;
+        return errReturnValue;
+    };
+
+    var testset_not_ok = ['a', 'b', 'aB', 'bA', '?', 'AA', 'BB', 'aa', 'bb', '?A', '?a'];
+    var base = i;
+    var rv;
+    for (var i = 0, len = testset_not_ok.length; i < len; i++) {
+        try {
+            rv = parser.parse(testset_not_ok[i]);
+            console.log("test #" +  (base + i) + ": '" +  testset_not_ok[i] + "' ==> ", rv);
+            assert.strictEqual(rv, errReturnValue);
+        } catch (ex) {
+            console.log("test #" +  (base + i) + ": '" +  testset_not_ok[i] + "' ==> EXCEPTION: ", ex);
+            throw ex;
+        }
+    }
+
     // if you get past the assert(), you're good.
     console.log("tested OK");
 };