Implement while loops

include/elna/gcc/elna-diagnostic.h

@@ -8,6 +8,12 @@
 
 #include "elna/source/result.h"
 
-location_t elna_gcc_location(const elna::source::position *position);
+namespace elna
+{
+namespace gcc
+{
+    location_t get_location(const elna::source::position *position);
 
-const char *elna_gcc_print_type(tree type);
+    const char *print_type(tree type);
+}
+}

include/elna/gcc/elna-generic.h

@@ -20,6 +20,9 @@ namespace gcc
         tree current_statements{ NULL_TREE };
         tree current_expression{ NULL_TREE };
         std::unordered_map<std::string, tree> symbol_map;
+        tree main_fndecl{ NULL_TREE };
+
+        tree build_label_decl (const char *name, location_t loc);
 
     public:
         void visit(source::program *program) override;
@@ -30,6 +33,8 @@ namespace gcc
         void visit(source::declaration *declaration) override;
         void visit(source::variable_expression *expression) override;
         void visit(source::assign_statement *statement) override;
+        void visit(source::if_statement *statement) override;
+        void visit(source::while_statement *statement) override;
     };
 }
 }

include/elna/source/ast.h

@@ -486,5 +486,7 @@ namespace source
         expression& operand();
         unary_operator operation() const noexcept;
     };
+
+    const char *print_binary_operator(const binary_operator operation);
 }
 }