Removed parsing support traits to have extends and implements.

Author: Guilherme Blanco

Zend/tests/traits/bug55524.phpt

@@ -12,4 +12,4 @@ trait Foo extends Base {
 echo 'DONE';
 ?>
 --EXPECTF--
-Fatal error: A trait (Foo) cannot extend a class. Traits can only be composed from other traits with the 'use' keyword. Error in %s on line %d
+Parse error: syntax error, unexpected 'extends' (T_EXTENDS), expecting '{' in %s on line %d

Zend/tests/traits/bugs/interfaces.phpt

@@ -16,4 +16,4 @@ trait THello implements MyInterface {
 
 ?>
 --EXPECTF--	
-Fatal error: Cannot use 'MyInterface' as interface on 'THello' since it is a Trait in %s on line %d
+Parse error: syntax error, unexpected 'implements' (T_IMPLEMENTS), expecting '{' in %s on line %d

Zend/zend_compile.c

@@ -4457,12 +4457,6 @@ void zend_compile_implements(znode *class_node, zend_ast *ast) /* {{{ */
 
 		zend_op *opline;
 
-		/* Traits can not implement interfaces */
-		if (ZEND_CE_IS_TRAIT(CG(active_class_entry))) {
-			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use '%s' as interface on '%s' "
-				"since it is a Trait", name->val, CG(active_class_entry)->name->val);
-		}
-
 		if (!zend_is_const_default_class_ref(class_ast)) {
 			zend_error_noreturn(E_COMPILE_ERROR,
 				"Cannot use '%s' as interface name as it is reserved", name->val);
@@ -4536,12 +4530,6 @@ void zend_compile_class_decl(zend_ast *ast) /* {{{ */
 	}
 
 	if (extends_ast) {
-		if (ZEND_CE_IS_TRAIT(ce)) {
-			zend_error_noreturn(E_COMPILE_ERROR, "A trait (%s) cannot extend a class. "
-				"Traits can only be composed from other traits with the 'use' keyword. Error",
-				name->val);
-		}
-
 		if (!zend_is_const_default_class_ref(extends_ast)) {
 			zend_string *extends_name = zend_ast_get_str(extends_ast);
 			zend_error_noreturn(E_COMPILE_ERROR,

Zend/zend_language_parser.y

@@ -445,8 +445,8 @@ class_modifier:
 
 trait_declaration_statement:
 		T_TRAIT { $<num>$ = CG(zend_lineno); }
-		T_STRING extends_from implements_list backup_doc_comment '{' class_statement_list '}'
-			{ $$ = zend_ast_create_decl(ZEND_AST_CLASS, ZEND_ACC_TRAIT, $<num>2, $6, zend_ast_get_str($3), $4, $5, $8); }
+		T_STRING backup_doc_comment '{' class_statement_list '}'
+			{ $$ = zend_ast_create_decl(ZEND_AST_CLASS, ZEND_ACC_TRAIT, $<num>2, $4, zend_ast_get_str($3), NULL, NULL, $6); }
 ;
 
 interface_declaration_statement: