From: DeaDDooMER <deaddoomer@deadsoftware.ru>
Date: Mon, 24 Jul 2017 19:27:59 +0000 (+0300)
Subject: Реализованы неявные объявления типов наперёд
X-Git-Url: http://deadsoftware.ru/gitweb?a=commitdiff_plain;h=3376c57aa304940b405940c6463df71c7c1c7f01;p=dsw-obn.git

Реализованы неявные объявления типов наперёд
---

diff --git a/generator.c b/generator.c
index f65b066..a802a96 100644
--- a/generator.c
+++ b/generator.c
@@ -93,20 +93,7 @@ oberon_generator_init_type(oberon_context_t * ctx, oberon_type_t * type)
 	}
 	else if(type -> class == OBERON_TYPE_RECORD)
 	{
-		// TODO type exstension
-
-		int num_fields = type -> num_decl;
-		gcc_jit_field * fields[num_fields];
-		oberon_object_t * o = type -> decl;
-		for(int i = 0; i < num_fields; i++)
-		{
-			assert(o -> class == OBERON_CLASS_FIELD);
-			gen_var_t * var = o -> gen_var;
-			fields[i] = var -> gcc_field;
-			o = o -> next;
-		}
-
-		gcc_struct = gcc_jit_context_new_struct_type(gcc_context, NULL, "", num_fields, fields);
+		gcc_struct = gcc_jit_context_new_opaque_struct(gcc_context, NULL, "");
 		gcc_type = gcc_jit_struct_as_type(gcc_struct);
 	}
 	else if(type -> class == OBERON_TYPE_POINTER)
@@ -144,6 +131,32 @@ oberon_generator_init_type(oberon_context_t * ctx, oberon_type_t * type)
 	gen_type -> gcc_struct = gcc_struct;
 }
 
+void
+oberon_generator_init_record(oberon_context_t * ctx, oberon_type_t * type)
+{
+	assert(type -> class == OBERON_TYPE_RECORD);
+
+	gen_type_t * gen_type = type -> gen_type;
+	gcc_jit_struct * gcc_struct = gen_type -> gcc_struct;
+
+	// TODO type exstension
+
+	int num_fields = type -> num_decl;
+	gcc_jit_field * fields[num_fields];
+	oberon_object_t * o = type -> decl;
+	for(int i = 0; i < num_fields; i++)
+	{
+		assert(o -> class == OBERON_CLASS_FIELD);
+		gen_var_t * var = o -> gen_var;
+		fields[i] = var -> gcc_field;
+		o = o -> next;
+	}
+
+	gcc_jit_struct_set_fields (gcc_struct, NULL, num_fields, fields);
+
+	//gcc_struct = gcc_jit_context_new_struct_type(gcc_context, NULL, "", num_fields, fields);
+}
+
 void
 oberon_generator_init_var(oberon_context_t * ctx, oberon_object_t * var)
 {
diff --git a/generator.h b/generator.h
index 2957aa8..085c2ca 100644
--- a/generator.h
+++ b/generator.h
@@ -4,6 +4,7 @@
 
 void oberon_generator_init_context(oberon_context_t * ctx);
 void oberon_generator_init_type(oberon_context_t * ctx, oberon_type_t * type);
+void oberon_generator_init_record(oberon_context_t * ctx, oberon_type_t * type);
 void oberon_generator_init_var(oberon_context_t * ctx, oberon_object_t * var);
 void oberon_generator_init_proc(oberon_context_t * ctx, oberon_object_t * proc);
 void oberon_generator_destroy_context(oberon_context_t * ctx);
diff --git a/notes b/notes
index 0be804b..d895de7 100644
--- a/notes
+++ b/notes
@@ -1,6 +1,5 @@
 - нету процедуры NEW
 - не реализовано расширение типа record
-- не реализовано преждевременное объявление типа
 - не реализованы многомерные массивы
 
 - не реализованы локальные объявления в процедурах
diff --git a/oberon.c b/oberon.c
index 7ca600e..847e9c7 100644
--- a/oberon.c
+++ b/oberon.c
@@ -172,8 +172,6 @@ oberon_define_field(oberon_context_t * ctx, oberon_type_t * rec, char *  name, o
 	field -> type = type;
 
 	rec -> num_decl += 1;
-	oberon_generator_init_var(ctx, field);
-
 	x -> next = field;
 }
 
@@ -189,7 +187,7 @@ oberon_find_object_in_list(oberon_object_t * list, char * name)
 }
 
 static oberon_object_t *
-oberon_find_object(oberon_scope_t * scope, char * name)
+oberon_find_object(oberon_scope_t * scope, char * name, int check_it)
 {
 	oberon_object_t * result = NULL;
 
@@ -200,7 +198,7 @@ oberon_find_object(oberon_scope_t * scope, char * name)
 		s = s -> up;
 	}
 
-	if(result == NULL)
+	if(check_it && result == NULL)
 	{
 		oberon_error(scope -> ctx, "undefined ident %s", name);
 	}
@@ -236,6 +234,7 @@ oberon_define_type(oberon_scope_t * scope, char * name, oberon_type_t * type)
 	return id;
 }
 
+/*
 static oberon_type_t *
 oberon_find_type(oberon_scope_t * scope, char * name)
 {
@@ -247,6 +246,7 @@ oberon_find_type(oberon_scope_t * scope, char * name)
 
 	return x -> type;
 }
+*/
 
 static oberon_object_t *
 oberon_define_var(oberon_scope_t * scope, int class, char * name, oberon_type_t * type)
@@ -254,7 +254,6 @@ oberon_define_var(oberon_scope_t * scope, int class, char * name, oberon_type_t
 	oberon_object_t * var;
 	var = oberon_define_object(scope, name, class);
 	var -> type = type;
-	oberon_generator_init_var(scope -> ctx, var);
 	return var;
 }
 
@@ -279,7 +278,6 @@ oberon_define_proc(oberon_scope_t * scope, char * name, oberon_type_t * signatur
 	oberon_object_t * proc;
 	proc = oberon_define_object(scope, name, OBERON_CLASS_PROC);
 	proc -> type = signature;
-	oberon_generator_init_proc(scope -> ctx, proc);
 	return proc;
 }
 
@@ -563,7 +561,7 @@ static void oberon_expect_token(oberon_context_t * ctx, int token);
 static oberon_expr_t * oberon_expr(oberon_context_t * ctx);
 static void oberon_assert_token(oberon_context_t * ctx, int token);
 static char * oberon_assert_ident(oberon_context_t * ctx);
-static oberon_type_t * oberon_type(oberon_context_t * ctx);
+static void oberon_type(oberon_context_t * ctx, oberon_type_t ** type);
 
 static oberon_expr_t *
 oberon_new_operator(int op, oberon_type_t * result, oberon_expr_t * left, oberon_expr_t * right)
@@ -809,7 +807,7 @@ oberon_designator(oberon_context_t * ctx)
 	oberon_expr_t * expr;
 
 	name = oberon_assert_ident(ctx);
-	var = oberon_find_object(ctx -> decl, name);
+	var = oberon_find_object(ctx -> decl, name, 1);
 
 	switch(var -> class)
 	{
@@ -1203,132 +1201,16 @@ oberon_assert_ident(oberon_context_t * ctx)
 	return ident;
 }
 
-static oberon_type_t *
-oberon_make_array_type(oberon_context_t * ctx, int dim, oberon_item_t * size, oberon_type_t * base)
-{
-	assert(dim == 1);
-	oberon_type_t * newtype;
-
-	if(size -> mode != MODE_INTEGER)
-	{
-		oberon_error(ctx, "requires integer constant");
-	}
-
-	newtype = oberon_new_type_ptr(OBERON_TYPE_ARRAY);
-	newtype -> dim = dim;
-	newtype -> size = size -> integer;
-	newtype -> base = base;
-	oberon_generator_init_type(ctx, newtype);
-
-	return newtype;
-}
-
 static void
-oberon_field_list(oberon_context_t * ctx, oberon_type_t * rec)
-{
-	if(ctx -> token == IDENT)
-	{
-		char * name;
-		oberon_type_t * type;
-		name = oberon_assert_ident(ctx);
-		oberon_assert_token(ctx, COLON);
-		type = oberon_type(ctx);
-		oberon_define_field(ctx, rec, name, type);
-	}
-}
-
-static oberon_type_t *
-oberon_make_pointer(oberon_context_t * ctx, oberon_type_t * type)
-{
-	if(type -> class == OBERON_TYPE_POINTER)
-	{
-		return type;
-	}
-
-	if(type -> class == OBERON_TYPE_INTEGER
-		|| type -> class == OBERON_TYPE_BOOLEAN
-		|| type -> class == OBERON_TYPE_PROCEDURE
-		|| type -> class == OBERON_TYPE_VOID)
-	{
-		oberon_error(ctx, "oberon not support pointers to non structure types");
-	}
-
-	oberon_type_t * newtype;
-	newtype = oberon_new_type_ptr(OBERON_TYPE_POINTER);
-	newtype -> base = type;
-
-	oberon_generator_init_type(ctx, newtype);
-
-	return newtype;
-}
-
-static oberon_type_t * oberon_opt_formal_pars(oberon_context_t * ctx, int class);
-
-static oberon_type_t *
-oberon_type(oberon_context_t * ctx)
+oberon_var_decl(oberon_context_t * ctx)
 {
+	char * name;
 	oberon_type_t * type;
+	type = oberon_new_type_ptr(OBERON_TYPE_VOID);
 
-	if(ctx -> token == IDENT)
-	{
-		char * name = oberon_assert_ident(ctx);
-		type = oberon_find_type(ctx -> decl, name);
-	}
-	else if(ctx -> token == ARRAY)
-	{
-		oberon_assert_token(ctx, ARRAY);
-		oberon_item_t * size = oberon_const_expr(ctx);
-		oberon_assert_token(ctx, OF);
-		oberon_type_t * base = oberon_type(ctx);
-		type = oberon_make_array_type(ctx, 1, size, base);
-	}
-	else if(ctx -> token == RECORD)
-	{
-		type = oberon_new_type_ptr(OBERON_TYPE_RECORD);
-		oberon_object_t * list = malloc(sizeof *list);
-	        memset(list, 0, sizeof *list);
-		type -> num_decl = 0;
-		type -> base = NULL;
-		type -> decl = list;
-
-		oberon_assert_token(ctx, RECORD);
-		oberon_field_list(ctx, type);
-		while(ctx -> token == SEMICOLON)
-		{
-			oberon_assert_token(ctx, SEMICOLON);
-			oberon_field_list(ctx, type);
-		}
-		oberon_assert_token(ctx, END);
-
-		type -> decl = type -> decl -> next;
-		oberon_generator_init_type(ctx, type);
-	}
-	else if(ctx -> token == POINTER)
-	{
-		oberon_assert_token(ctx, POINTER);
-		oberon_assert_token(ctx, TO);
-		type = oberon_type(ctx);
-		type = oberon_make_pointer(ctx, type);
-	}
-	else if(ctx -> token == PROCEDURE)
-	{
-		oberon_assert_token(ctx, PROCEDURE);
-		type = oberon_opt_formal_pars(ctx, OBERON_TYPE_PROCEDURE);
-	}
-	else
-	{
-		oberon_error(ctx, "invalid type declaration");
-	}
-
-	return type;
-}
-
-static void
-oberon_var_decl(oberon_context_t * ctx)
-{
-	char * name = oberon_assert_ident(ctx);
+	name = oberon_assert_ident(ctx);
 	oberon_assert_token(ctx, COLON);
-	oberon_type_t * type = oberon_type(ctx);
+	oberon_type(ctx, &type);
 	oberon_define_var(ctx -> decl, OBERON_CLASS_VAR, name, type);
 }
 
@@ -1368,7 +1250,8 @@ oberon_fp_section(oberon_context_t * ctx, int * num_decl)
 	oberon_assert_token(ctx, COLON);
 
 	oberon_type_t * type;
-	type = oberon_type(ctx);
+	type = oberon_new_type_ptr(OBERON_TYPE_VOID);
+	oberon_type(ctx, &type);
 
 	oberon_object_t * first;
 	first = oberon_make_param(ctx, modifer_token, name, type);
@@ -1380,24 +1263,18 @@ oberon_fp_section(oberon_context_t * ctx, int * num_decl)
 #define ISFPSECTION \
 	((ctx -> token == VAR) || (ctx -> token == IDENT))
 
-static oberon_type_t *
-oberon_formal_pars(oberon_context_t * ctx)
+static void
+oberon_formal_pars(oberon_context_t * ctx, oberon_type_t * signature)
 {
-	oberon_type_t * tp;
-	tp = oberon_new_type_ptr(OBERON_TYPE_PROCEDURE);
-	tp -> num_decl = 0;
-	tp -> base = ctx -> void_type;
-	tp -> decl = NULL;
-
 	oberon_assert_token(ctx, LPAREN);
 
 	if(ISFPSECTION)
 	{
-		tp -> decl = oberon_fp_section(ctx, &tp -> num_decl);
+		signature -> decl = oberon_fp_section(ctx, &signature -> num_decl);
 		while(ctx -> token == SEMICOLON)
 		{
 			oberon_assert_token(ctx, SEMICOLON);
-			oberon_fp_section(ctx, &tp -> num_decl);
+			oberon_fp_section(ctx, &signature -> num_decl);
 		}
 	}
 
@@ -1406,32 +1283,24 @@ oberon_formal_pars(oberon_context_t * ctx)
 	if(ctx -> token == COLON)
 	{
 		oberon_assert_token(ctx, COLON);
-		tp -> base = oberon_type(ctx);
+		oberon_type(ctx, &signature -> base);
 	}
-
-	oberon_generator_init_type(ctx, tp);
-	return tp;
 }
 
-static oberon_type_t *
-oberon_opt_formal_pars(oberon_context_t * ctx, int class)
+static void
+oberon_opt_formal_pars(oberon_context_t * ctx, oberon_type_t ** type)
 {
 	oberon_type_t * signature;
+	signature = *type;
+	signature -> class = OBERON_TYPE_PROCEDURE;
+	signature -> num_decl = 0;
+	signature -> base = ctx -> void_type;
+	signature -> decl = NULL;
 
 	if(ctx -> token == LPAREN)
 	{
-		signature = oberon_formal_pars(ctx);
-	}
-	else
-	{
-		signature = oberon_new_type_ptr(class);
-		signature -> num_decl = 0;
-		signature -> base = ctx -> void_type;
-		signature -> decl = NULL;
-		oberon_generator_init_type(ctx, signature);
+		oberon_formal_pars(ctx, signature);
 	}
-
-	return signature;
 }
 
 static void
@@ -1471,7 +1340,8 @@ oberon_proc_decl(oberon_context_t * ctx)
 	oberon_open_scope(ctx);
 
 	oberon_type_t * signature;
-	signature = oberon_opt_formal_pars(ctx, OBERON_TYPE_PROCEDURE);
+	signature = oberon_new_type_ptr(OBERON_TYPE_VOID);
+	oberon_opt_formal_pars(ctx, &signature);
 
 	oberon_object_t * proc;
 	proc = oberon_define_proc(this_proc_def_scope, name, signature);
@@ -1528,6 +1398,140 @@ oberon_const_decl(oberon_context_t * ctx)
 	constant -> value = value;
 }
 
+static void
+oberon_make_array_type(oberon_context_t * ctx, int dim, oberon_item_t * size, oberon_type_t * base, oberon_type_t ** type)
+{
+	assert(dim == 1);
+	if(size -> mode != MODE_INTEGER)
+	{
+		oberon_error(ctx, "requires integer constant");
+	}
+
+	oberon_type_t * arr;
+	arr = *type;
+	arr -> class = OBERON_TYPE_ARRAY;
+	arr -> dim = dim;
+	arr -> size = size -> integer;
+	arr -> base = base;
+}
+
+static void
+oberon_field_list(oberon_context_t * ctx, oberon_type_t * rec)
+{
+	if(ctx -> token == IDENT)
+	{
+		char * name;
+		oberon_type_t * type;
+		type = oberon_new_type_ptr(OBERON_TYPE_VOID);
+
+		name = oberon_assert_ident(ctx);
+		oberon_assert_token(ctx, COLON);
+		oberon_type(ctx, &type);
+		oberon_define_field(ctx, rec, name, type);
+	}
+}
+
+static void
+oberon_qualident_type(oberon_context_t * ctx, oberon_type_t ** type)
+{
+	char * name;
+	oberon_object_t * to;
+
+	name = oberon_assert_ident(ctx);
+	to = oberon_find_object(ctx -> decl, name, 0);
+
+	if(to != NULL)
+	{
+		if(to -> class != OBERON_CLASS_TYPE)
+		{
+			oberon_error(ctx, "not a type");
+		}
+	}
+	else
+	{
+		to = oberon_define_object(ctx -> decl, name, OBERON_CLASS_TYPE);
+		to -> type = oberon_new_type_ptr(OBERON_TYPE_VOID);
+	}
+
+	*type = to -> type;
+}
+
+static void oberon_opt_formal_pars(oberon_context_t * ctx, oberon_type_t ** type);
+
+/*
+ * Правило граматики "type". Указатель type должен указывать на существующий объект!
+ */
+
+static void
+oberon_type(oberon_context_t * ctx, oberon_type_t ** type)
+{
+	if(ctx -> token == IDENT)
+	{
+		oberon_qualident_type(ctx, type);
+	}
+	else if(ctx -> token == ARRAY)
+	{
+		oberon_assert_token(ctx, ARRAY);
+
+		oberon_item_t * size;
+		size = oberon_const_expr(ctx);
+
+		oberon_assert_token(ctx, OF);
+
+		oberon_type_t * base;
+		base = oberon_new_type_ptr(OBERON_TYPE_VOID);
+		oberon_type(ctx, &base);
+
+		oberon_make_array_type(ctx, 1, size, base, type);
+	}
+	else if(ctx -> token == RECORD)
+	{
+		oberon_type_t * rec;
+		rec = *type;
+		rec -> class = OBERON_TYPE_RECORD;
+		oberon_object_t * list = malloc(sizeof *list);
+	        memset(list, 0, sizeof *list);
+		rec -> num_decl = 0;
+		rec -> base = NULL;
+		rec -> decl = list;
+
+		oberon_assert_token(ctx, RECORD);
+		oberon_field_list(ctx, rec);
+		while(ctx -> token == SEMICOLON)
+		{
+			oberon_assert_token(ctx, SEMICOLON);
+			oberon_field_list(ctx, rec);
+		}
+		oberon_assert_token(ctx, END);
+
+		rec -> decl = rec -> decl -> next;
+		*type = rec;
+	}
+	else if(ctx -> token == POINTER)
+	{
+		oberon_assert_token(ctx, POINTER);
+		oberon_assert_token(ctx, TO);
+
+		oberon_type_t * base;
+		base = oberon_new_type_ptr(OBERON_TYPE_VOID);
+		oberon_type(ctx, &base);
+
+		oberon_type_t * ptr;
+		ptr = *type;
+		ptr -> class = OBERON_TYPE_POINTER;
+		ptr -> base = base;
+	}
+	else if(ctx -> token == PROCEDURE)
+	{
+		oberon_assert_token(ctx, PROCEDURE);
+		oberon_opt_formal_pars(ctx, type);
+	}
+	else
+	{
+		oberon_error(ctx, "invalid type declaration");
+	}
+}
+
 static void
 oberon_type_decl(oberon_context_t * ctx)
 {
@@ -1536,11 +1540,313 @@ oberon_type_decl(oberon_context_t * ctx)
 	oberon_type_t * type;
 
 	name = oberon_assert_ident(ctx);
+
+	newtype = oberon_find_object(ctx -> decl, name, 0);
+	if(newtype == NULL)
+	{
+		newtype = oberon_define_object(ctx -> decl, name, OBERON_CLASS_TYPE);
+		newtype -> type = oberon_new_type_ptr(OBERON_TYPE_VOID);
+		assert(newtype -> type);
+	}
+	else
+	{
+		if(newtype -> class != OBERON_CLASS_TYPE)
+		{
+			oberon_error(ctx, "mult definition");
+		}
+
+		if(newtype -> linked)
+		{
+			oberon_error(ctx, "mult definition - already linked");
+		}
+	}
+
 	oberon_assert_token(ctx, EQUAL);
-	type = oberon_type(ctx);
 
-	newtype = oberon_define_object(ctx -> decl, name, OBERON_CLASS_TYPE);
+	type = newtype -> type;
+	oberon_type(ctx, &type);
+
+	if(type -> class == OBERON_TYPE_VOID)
+	{
+		oberon_error(ctx, "recursive alias declaration");
+	}
+
 	newtype -> type = type;
+	newtype -> linked = 1;
+}
+
+static void oberon_prevent_recursive_object(oberon_context_t * ctx, oberon_object_t * x);
+static void oberon_prevent_recursive_type(oberon_context_t * ctx, oberon_type_t * type);
+
+static void
+oberon_prevent_recursive_pointer(oberon_context_t * ctx, oberon_type_t * type)
+{
+	if(type -> class != OBERON_TYPE_POINTER
+		&& type -> class != OBERON_TYPE_ARRAY)
+	{
+		return;
+	}
+
+	if(type -> recursive)
+	{
+		oberon_error(ctx, "recursive pointer declaration");
+	}
+
+	if(type -> base -> class == OBERON_TYPE_POINTER)
+	{
+		oberon_error(ctx, "attempt to make pointer to pointer");
+	}
+
+	type -> recursive = 1;
+
+	oberon_prevent_recursive_pointer(ctx, type -> base);
+
+	type -> recursive = 0;
+}
+
+static void
+oberon_prevent_recursive_record(oberon_context_t * ctx, oberon_type_t * type)
+{
+	if(type -> class != OBERON_TYPE_RECORD)
+	{
+		return;
+	}
+
+	if(type -> recursive)
+	{
+		oberon_error(ctx, "recursive record declaration");
+	}
+
+	type -> recursive = 1;
+
+	int num_fields = type -> num_decl;
+	oberon_object_t * field = type -> decl;
+	for(int i = 0; i < num_fields; i++)
+	{
+		oberon_prevent_recursive_object(ctx, field);
+		field = field -> next;
+	}
+
+	type -> recursive = 0;	
+}
+static void
+oberon_prevent_recursive_procedure(oberon_context_t * ctx, oberon_type_t * type)
+{
+	if(type -> class != OBERON_TYPE_PROCEDURE)
+	{
+		return;
+	}
+
+	if(type -> recursive)
+	{
+		oberon_error(ctx, "recursive procedure declaration");
+	}
+
+	type -> recursive = 1;
+
+	int num_fields = type -> num_decl;
+	oberon_object_t * field = type -> decl;
+	for(int i = 0; i < num_fields; i++)
+	{
+		oberon_prevent_recursive_object(ctx, field);
+		field = field -> next;
+	}
+
+	type -> recursive = 0;	
+}
+
+static void
+oberon_prevent_recursive_array(oberon_context_t * ctx, oberon_type_t * type)
+{
+	if(type -> class != OBERON_TYPE_ARRAY)
+	{
+		return;
+	}
+
+	if(type -> recursive)
+	{
+		oberon_error(ctx, "recursive array declaration");
+	}
+
+	type -> recursive = 1;
+
+	oberon_prevent_recursive_type(ctx, type -> base);
+
+	type -> recursive = 0;
+}
+
+static void
+oberon_prevent_recursive_type(oberon_context_t * ctx, oberon_type_t * type)
+{
+	if(type -> class == OBERON_TYPE_POINTER)
+	{
+		oberon_prevent_recursive_pointer(ctx, type);
+	}
+	else if(type -> class == OBERON_TYPE_RECORD)
+	{
+		oberon_prevent_recursive_record(ctx, type);
+	}
+	else if(type -> class == OBERON_TYPE_ARRAY)
+	{
+		oberon_prevent_recursive_array(ctx, type);
+	}
+	else if(type -> class == OBERON_TYPE_PROCEDURE)
+	{
+		oberon_prevent_recursive_procedure(ctx, type);
+	}
+}
+
+static void
+oberon_prevent_recursive_object(oberon_context_t * ctx, oberon_object_t * x)
+{
+	switch(x -> class)
+	{
+		case OBERON_CLASS_VAR:
+		case OBERON_CLASS_TYPE:
+		case OBERON_CLASS_PARAM:
+		case OBERON_CLASS_VAR_PARAM:
+		case OBERON_CLASS_FIELD:
+			oberon_prevent_recursive_type(ctx, x -> type);
+			break;
+		case OBERON_CLASS_CONST:
+		case OBERON_CLASS_PROC:
+			break;
+		default:
+			oberon_error(ctx, "oberon_prevent_recursive_object: wat");
+			break;
+	}
+}
+
+static void
+oberon_prevent_recursive_decl(oberon_context_t * ctx)
+{
+	oberon_object_t * x = ctx -> decl -> list -> next;
+
+	while(x)
+	{
+		oberon_prevent_recursive_object(ctx, x);
+		x = x -> next;
+	}
+}
+
+static void oberon_initialize_object(oberon_context_t * ctx, oberon_object_t * x);
+static void oberon_initialize_type(oberon_context_t * ctx, oberon_type_t * type);
+
+static void
+oberon_initialize_record_fields(oberon_context_t * ctx, oberon_type_t * type)
+{
+	if(type -> class != OBERON_TYPE_RECORD)
+	{
+		return;
+	}
+
+	int num_fields = type -> num_decl;
+	oberon_object_t * field = type -> decl;
+	for(int i = 0; i < num_fields; i++)
+	{
+		if(field -> type -> class == OBERON_TYPE_POINTER)
+		{
+			oberon_initialize_type(ctx, field -> type);
+		}
+
+		oberon_initialize_object(ctx, field);
+		field = field -> next;
+	}
+
+	oberon_generator_init_record(ctx, type);
+}
+
+static void
+oberon_initialize_type(oberon_context_t * ctx, oberon_type_t * type)
+{
+	if(type -> class == OBERON_TYPE_VOID)
+	{
+		oberon_error(ctx, "undeclarated type");
+	}
+
+	if(type -> initialized)
+	{
+		return;
+	}
+
+	type -> initialized = 1;
+
+	if(type -> class == OBERON_TYPE_POINTER)
+	{
+		if(type -> base -> class == OBERON_TYPE_RECORD)
+		{
+			oberon_generator_init_type(ctx, type -> base);
+			oberon_generator_init_type(ctx, type);
+		}
+		else
+		{
+			oberon_initialize_type(ctx, type -> base);
+			oberon_generator_init_type(ctx, type);
+		}
+	}
+	else if(type -> class == OBERON_TYPE_ARRAY)
+	{
+		oberon_generator_init_type(ctx, type);
+		oberon_initialize_type(ctx, type -> base);		
+	}
+	else if(type -> class == OBERON_TYPE_RECORD)
+	{
+		oberon_generator_init_type(ctx, type);
+		oberon_initialize_record_fields(ctx, type);
+	}
+	else if(type -> class == OBERON_TYPE_PROCEDURE)
+	{
+		int num_fields = type -> num_decl;
+		oberon_object_t * field = type -> decl;
+		for(int i = 0; i < num_fields; i++)
+		{
+			oberon_initialize_object(ctx, field);
+			field = field -> next;
+		}		
+
+		oberon_generator_init_type(ctx, type);
+	}
+	else
+	{
+		oberon_generator_init_type(ctx, type);
+	}
+}
+
+static void
+oberon_initialize_object(oberon_context_t * ctx, oberon_object_t * x)
+{
+	printf("oberon_initialize_object: name %s class %i\n", x -> name, x -> class);
+	switch(x -> class)
+	{
+		case OBERON_CLASS_TYPE:
+			oberon_initialize_type(ctx, x -> type);
+			break;
+		case OBERON_CLASS_VAR:
+		case OBERON_CLASS_PARAM:
+		case OBERON_CLASS_VAR_PARAM:
+		case OBERON_CLASS_FIELD:
+			oberon_initialize_type(ctx, x -> type);
+			oberon_generator_init_var(ctx, x);
+			break;
+		case OBERON_CLASS_CONST:
+		case OBERON_CLASS_PROC:
+			break;
+		default:
+			oberon_error(ctx, "oberon_prevent_recursive_object: wat");
+			break;
+	}
+}
+
+static void
+oberon_initialize_decl(oberon_context_t * ctx)
+{
+	oberon_object_t * x = ctx -> decl -> list;
+
+	while(x -> next)
+	{
+		oberon_initialize_object(ctx, x -> next);
+		x = x -> next;
+	}	
 }
 
 static void
@@ -1576,6 +1882,9 @@ oberon_decl_seq(oberon_context_t * ctx)
 		}
 	}
 
+	oberon_prevent_recursive_decl(ctx);
+	oberon_initialize_decl(ctx);
+
 	while(ctx -> token == PROCEDURE)
 	{
 		oberon_proc_decl(ctx);
diff --git a/oberon.h b/oberon.h
index 16044d4..41cec62 100644
--- a/oberon.h
+++ b/oberon.h
@@ -104,6 +104,8 @@ struct oberon_type_s
 	oberon_type_t * base;
 	oberon_object_t * decl;
 
+	int recursive;
+	int initialized;
 	gen_type_t * gen_type;
 };
 
@@ -142,6 +144,7 @@ struct oberon_object_s
 	char * name;
 	int class;
 
+	int linked;
 	oberon_type_t * type;
 	oberon_item_t * value;
 	oberon_object_t * next;
diff --git a/test.c b/test.c
index 8f3edc4..960bef8 100644
--- a/test.c
+++ b/test.c
@@ -4,19 +4,19 @@
 
 static const char source[] =
 	"MODULE Test;"
-	""
 	"TYPE"
-	"	MyInt = INTEGER;"
-	"	MyRec = POINTER TO RECORD"
-	"		a : MyInt;"
-	"		next : MyRec;"
-	"	END;"
+	"	MyArr = ARRAY 3 OF INTEGER;"
+	"	MyArrPtr = POINTER TO MyArr;"
+	"	MyRec = POINTER TO MyRecDesc;"
+	"	MyRecDesc = RECORD next : POINTER TO MyRecDesc END;"
 	""
 	"VAR"
-	"	r : MyRec;"
+	"	a : MyArr;"
+	"	b : MyArrPtr;"
+	"	c : MyRec;"
+	"	d : MyRecDesc;"
 	""
 	"BEGIN"
-	"	"
 	"END Test."
 ;
 
diff --git a/test/Test b/test/Test
new file mode 100755
index 0000000..2c0d983
Binary files /dev/null and b/test/Test differ
diff --git a/test/Test.Mod b/test/Test.Mod
new file mode 100644
index 0000000..5454854
--- /dev/null
+++ b/test/Test.Mod
@@ -0,0 +1,6 @@
+MODULE Test;
+
+TYPE
+	MyArr = POINTER TO ARRAY OF MyArr;
+
+END Test.
diff --git a/test/Test.c b/test/Test.c
new file mode 100644
index 0000000..c1cde12
--- /dev/null
+++ b/test/Test.c
@@ -0,0 +1,32 @@
+/* voc 2.1.0 [2017/06/08] for gcc LP64 on arch xtpam */
+
+#define SHORTINT INT8
+#define INTEGER  INT16
+#define LONGINT  INT32
+#define SET      UINT32
+
+#include "SYSTEM.h"
+
+struct Test__1 {
+	char _prvt0[1];
+};
+
+typedef
+	struct Test__1 *Test_MyRecDesc;
+
+
+
+export ADDRESS *Test__1__typ;
+
+
+
+__TDESC(Test__1, 1, 0) = {__TDFLDS("", 1), {-8}};
+
+export int main(int argc, char **argv)
+{
+	__INIT(argc, argv);
+	__REGMAIN("Test", 0);
+	__INITYP(Test__1, Test__1, 0);
+/* BEGIN */
+	__FINI;
+}
diff --git a/test/make.sh b/test/make.sh
new file mode 100755
index 0000000..74c6cf1
--- /dev/null
+++ b/test/make.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -e
+
+voc Test.Mod -m