Implement elsif

include/elna/gcc/elna-generic.h

@@ -34,6 +34,8 @@ namespace gcc
         void build_binary_operation(bool condition, source::binary_expression *expression,
             tree_code operator_code, tree left, tree right, tree target_type);
 
+        void make_if_branch(source::conditional_statements& branch, tree goto_endif);
+
     public:
         generic_visitor(std::shared_ptr<source::symbol_table<tree>> symbol_table);
 

include/elna/source/ast.h

@@ -617,6 +617,8 @@ namespace source
         std::vector<statement *> *m_alternative;
 
     public:
+        std::vector<conditional_statements *> branches;
+
         if_statement(const struct position position, conditional_statements *body,
                 std::vector<statement *> *alternative = nullptr);
         virtual void accept(parser_visitor *visitor) override;