/**
* test_visitor_null_visit:
* @fn test_visitor_null_visit
* Tests whether compilerkit_visitor_visit produces appropriate results in the CompilerKitVisitor struct.
* @pre None
* @param None
* @return void
*/
void test_visitor_null_visit(void)
{
GObject *symbol;
GObject *empty_set;
CompilerKitVisitor* visitor;
g_test_message ("Testing visitor null visits");
g_test_timer_start ();
symbol = compilerkit_symbol_new ('a');
empty_set = compilerkit_empty_set_get_instance ();
visitor = check_symbol();
// Assert that visitor produces the correct result
g_assert(compilerkit_visitor_visit(visitor, symbol) == symbol);
// NULL objects will produce NULL
g_assert(compilerkit_visitor_visit(visitor, NULL) == NULL);
// Nothing registered for empty set, so return NULL
g_assert(compilerkit_visitor_visit(visitor, empty_set) == NULL);
// Decrease the reference count for objects to free them.
g_object_unref (symbol);
g_object_unref (empty_set);
g_object_unref (visitor);
// This test shouldn't take too long to run
g_assert_cmpfloat(g_test_timer_elapsed (), <=, 1);
}
/**
* test_visitor_register_identity:
* @fn test_visitor_register_identity
* Tests whether compilerkit_visitor_register_identity function works as intended.
* @pre None
* @param None
* @return void
*/
void test_visitor_register_identity (void)
{
GObject *symbol;
GObject *empty_set;
CompilerKitVisitor *visitor;
g_test_message ("Testing visitor register identity");
g_test_timer_start ();
symbol = compilerkit_symbol_new ('a');
empty_set = compilerkit_empty_set_get_instance ();
visitor = compilerkit_visitor_new();
// Register the identity function (it returns whatever GObject* gets as a parameter during the visit)
compilerkit_visitor_register_identity (visitor, COMPILERKIT_TYPE_EMPTY_SET);
// Since we didn't register the symbol, the visitor should return NULL
g_assert (compilerkit_visitor_visit (visitor, symbol) == NULL);
// The visitor should produce symbol here, since we registered the identity function for the symbol class.
g_assert (compilerkit_visitor_visit (visitor, empty_set) == empty_set);
// Decrease the reference count for objects to free them.
g_object_unref (symbol);
g_object_unref (empty_set);
g_object_unref (visitor);
// This test shouldn't take too long to run
g_assert_cmpfloat(g_test_timer_elapsed (), <=, 1);
}
/* ToNfa concatenation. */
static GObject *to_nfa_concatenation (CompilerKitVisitor *self, GObject *obj)
{
CompilerKitConcatenation *cat;
g_assert(COMPILERKIT_IS_CONCATENATION(obj));
cat = COMPILERKIT_CONCATENATION (obj);
compilerkit_visitor_visit(self, compilerkit_concatenation_get_left (cat));
compilerkit_visitor_visit(self, compilerkit_concatenation_get_right (cat));
return NULL;
}
/* ToNfa alternation. */
static GObject *to_nfa_alternation (CompilerKitVisitor *self, GObject *obj)
{
CompilerKitAlternation *alt;
g_assert(COMPILERKIT_IS_ALTERNATION(obj));
alt = COMPILERKIT_ALTERNATION (obj);
compilerkit_visitor_visit(self, compilerkit_alternation_get_left (alt));
compilerkit_visitor_visit(self, compilerkit_alternation_get_right (alt));
return NULL;
}
/* StringBuilder alternation. */
static GObject *string_builder_alternation (CompilerKitVisitor *self, GObject *obj)
{
CompilerKitAlternation *alt;
GString *str = (GString *) compilerkit_visitor_get_state(self);
g_assert(COMPILERKIT_IS_ALTERNATION(obj));
alt = COMPILERKIT_ALTERNATION (obj);
compilerkit_visitor_visit(self, compilerkit_alternation_get_left (alt));
g_string_append_c(str, '|');
compilerkit_visitor_visit(self, compilerkit_alternation_get_right (alt));
return NULL;
}
/* ToNfa complement. */
static GObject *to_nfa_complement (CompilerKitVisitor *self, GObject *obj)
{
CompilerKitComplement *comp;
g_assert(COMPILERKIT_IS_COMPLEMENT(obj));
comp = COMPILERKIT_COMPLEMENT (obj);
compilerkit_visitor_visit(self, compilerkit_complement_get_node (comp));
return NULL;
}
/* ToNfa Kleene star. */
static GObject *to_nfa_kleene_star (CompilerKitVisitor *self, GObject *obj)
{
CompilerKitKleeneStar *star;
g_assert(COMPILERKIT_IS_KLEENE_STAR(obj));
star = COMPILERKIT_KLEENE_STAR (obj);
compilerkit_visitor_visit(self, compilerkit_kleene_star_get_node (star));
return NULL;
}
/**
* compilerkit_to_string:
* @fn compilerkit_to_string
* Return a string representation of an object (i.e., regex, grammar).
* @pre None
* @param GObject* An object
* @return A string representation of the object. The caller must free the returned string with `g_free()`
* @memberof CompilerKitVisitor
*/
gchar *compilerkit_to_string (GObject *obj)
{
GString *str;
CompilerKitVisitor *visitor = compilerkit_string_builder_visitor();
compilerkit_visitor_visit(visitor, obj);
str = (GString *) compilerkit_visitor_get_state(visitor);
g_object_unref (visitor);
return g_string_free (str, FALSE);
}
/* StringBuilder production. */
static GObject *string_builder_production (CompilerKitVisitor *self, GObject *obj)
{
GString *str = (GString *) compilerkit_visitor_get_state(self);
CompilerKitProduction *production;
GList *replacement;
g_assert(COMPILERKIT_IS_PRODUCTION(obj));
production = COMPILERKIT_PRODUCTION (obj);
compilerkit_visitor_visit (self, compilerkit_production_get_variable(production));
g_string_append (str, " -> ");
replacement = compilerkit_production_get_replacement(production);
while (replacement)
{
compilerkit_visitor_visit (self, (GObject *)replacement->data);
replacement = g_list_next (replacement);
}
g_string_append (str, "\n");
return NULL;
}
/* StringBuilder complement. */
static GObject *string_builder_complement (CompilerKitVisitor *self, GObject *obj)
{
CompilerKitComplement *comp;
GString *str = (GString *) compilerkit_visitor_get_state(self);
g_assert(COMPILERKIT_IS_COMPLEMENT(obj));
comp = COMPILERKIT_COMPLEMENT (obj);
g_string_append_c (str, '!');
compilerkit_visitor_visit(self, compilerkit_complement_get_node (comp));
return NULL;
}
/* StringBuilder Kleene star. */
static GObject *string_builder_kleene_star (CompilerKitVisitor *self, GObject *obj)
{
CompilerKitKleeneStar *star;
GString *str = (GString *) compilerkit_visitor_get_state(self);
g_assert(COMPILERKIT_IS_KLEENE_STAR(obj));
star = COMPILERKIT_KLEENE_STAR (obj);
g_string_append_c (str, '(');
compilerkit_visitor_visit(self, compilerkit_kleene_star_get_node (star));
g_string_append (str, ")*");
return NULL;
}
/* StringBuilder grammar. */
static GObject *string_builder_grammar (CompilerKitVisitor *self, GObject *obj)
{
GString *str = (GString *) compilerkit_visitor_get_state(self);
GList *productions;
CompilerKitGrammar *grammar;
g_assert(COMPILERKIT_IS_GRAMMAR(obj));
grammar = COMPILERKIT_GRAMMAR (obj);
productions = compilerkit_grammar_productions (grammar);
while (productions)
{
compilerkit_visitor_visit (self, productions->data);
productions = g_list_next (productions);
}
return NULL;
}