X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=src%2Foberon.c;h=6f9395ca71b81e1f8bf1254f9715a9568bf79610;hb=d25fb653bfe19a696d3f53abd784d32ba2d3ee03;hp=5a93489b35ed197ee2ac10b262a95c042583d146;hpb=a0ff807fe0e69c50469e506836467da32f23f754;p=dsw-obn.git

diff --git a/src/oberon.c b/src/oberon.c
index 5a93489..6f9395c 100644
--- a/src/oberon.c
+++ b/src/oberon.c
@@ -10,95 +10,16 @@
 #include "../include/oberon.h"
 
 #include "oberon-internals.h"
+#include "oberon-type-compat.h"
+#include "oberon-common.h"
 #include "generator.h"
 
-enum {
-	EOF_ = 0,
-	IDENT,
-	MODULE,
-	SEMICOLON,
-	END,
-	DOT,
-	VAR,
-	COLON,
-	BEGIN,
-	ASSIGN,
-	INTEGER,
-	LPAREN,
-	RPAREN,
-	EQUAL,
-	NEQ,
-	LESS,
-	LEQ,
-	GREAT,
-	GEQ,
-	IN,
-	IS,
-	PLUS,
-	MINUS,
-	OR,
-	STAR,
-	SLASH,
-	DIV,
-	MOD,
-	AND,
-	NOT,
-	PROCEDURE,
-	COMMA,
-	RETURN,
-	CONST,
-	TYPE,
-	ARRAY,
-	OF,
-	LBRACK,
-	RBRACK,
-	RECORD,
-	POINTER,
-	TO,
-	UPARROW,
-	NIL,
-	IMPORT,
-	REAL,
-	CHAR,
-	STRING,
-	IF,
-	THEN,
-	ELSE,
-	ELSIF,
-	WHILE,
-	DO,
-	REPEAT,
-	UNTIL,
-	FOR,
-	BY,
-	LOOP,
-	EXIT,
-	LBRACE,
-	RBRACE,
-	DOTDOT,
-	CASE,
-	BAR,
-	WITH
-};
-
 // =======================================================================
 //   UTILS
 // ======================================================================= 
 
 static void
-oberon_error(oberon_context_t * ctx, const char * fmt, ...)
-{
-	va_list ptr;
-	va_start(ptr, fmt);
-	fprintf(stderr, "error: ");
-	vfprintf(stderr, fmt, ptr);
-	fprintf(stderr, "\n");
-	fprintf(stderr, "  code_index = %i\n", ctx -> code_index);
-	fprintf(stderr, "  c          = %c\n", ctx -> c);
-	fprintf(stderr, "  token      = %i\n", ctx -> token);
-	va_end(ptr);
-	exit(1);
-}
+oberon_make_copy_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args);
 
 static oberon_type_t *
 oberon_new_type_ptr(int class)
@@ -690,6 +611,7 @@ static void oberon_read_string(oberon_context_t * ctx)
 
 	ctx -> token = STRING;
 	ctx -> string = string;
+	ctx -> integer = string[0];
 }
 
 static void oberon_read_token(oberon_context_t * ctx);
@@ -975,86 +897,30 @@ oberon_expr_list(oberon_context_t * ctx, int * num_expr, oberon_expr_t ** first,
 static oberon_expr_t *
 oberon_cast_expr(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * pref)
 {
-	return oberon_new_operator(OP_CAST, pref, expr, NULL);
-}
-
-static oberon_expr_t *
-oberno_make_record_cast(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * rec)
-{
-	oberon_type_t * from = expr -> result;
-	oberon_type_t * to = rec;
-
-	if(from -> class == OBERON_TYPE_POINTER && to -> class == OBERON_TYPE_POINTER)
-	{
-		from = from -> base;
-		to = to -> base;
-	}
-
-	if(from -> class != OBERON_TYPE_RECORD || to -> class != OBERON_TYPE_RECORD)
-	{
-		oberon_error(ctx, "must be record type");
-	}
-
-	return oberon_cast_expr(ctx, expr, rec);
-}
+	oberon_expr_t * cast;
 
-static oberon_type_t *
-oberon_get_equal_expr_type(oberon_context_t * ctx, oberon_type_t * a, oberon_type_t * b)
-{
-	oberon_type_t * result;
-	if(a -> class == OBERON_TYPE_REAL && b -> class == OBERON_TYPE_INTEGER)
+	if((oberon_is_char_type(pref) && oberon_is_const_string(expr) && strlen(expr -> item.string) == 1))
 	{
-		result = a;
-	}
-	else if(b -> class == OBERON_TYPE_REAL && a -> class == OBERON_TYPE_INTEGER)
-	{
-		result = b;
-	}
-	else if(a -> class != b -> class)
-	{
-		oberon_error(ctx, "oberon_get_equal_expr_type: incompatible types");
-	}
-	else if(a -> size > b -> size)
-	{
-		result = a;
+		/* Автоматически преобразуем строку единичного размера в символ */
+		cast = oberon_new_item(MODE_CHAR, ctx -> char_type, true);
+		cast -> item.integer = expr -> item.string[0];
 	}
 	else
 	{
-		result = b;
+		cast = oberon_new_operator(OP_CAST, pref, expr, NULL);
 	}
 
-	return result;
+	return cast;
 }
 
 static void
-oberon_check_record_compatibility(oberon_context_t * ctx, oberon_type_t * from, oberon_type_t * to)
+oberon_check_dst(oberon_context_t * ctx, oberon_expr_t * dst)
 {
-	if(from -> class == OBERON_TYPE_POINTER && to -> class == OBERON_TYPE_POINTER)
-	{
-		from = from -> base;
-		to = to -> base;
-	}
-
-	if(from -> class != OBERON_TYPE_RECORD || to -> class != OBERON_TYPE_RECORD)
-	{
-		oberon_error(ctx, "not a record");
-	}
-
-	oberon_type_t * t = from;
-	while(t != NULL && t != to)
-	{
-		t = t -> base;
-	}
-
-	if(t == NULL)
+	if(dst -> read_only)
 	{
-		oberon_error(ctx, "incompatible record types");
+		oberon_error(ctx, "read-only destination");
 	}
-}
 
-static void
-oberon_check_dst(oberon_context_t * ctx, oberon_expr_t * dst)
-{
 	if(dst -> is_item == false)
 	{
 		oberon_error(ctx, "not variable");
@@ -1088,132 +954,6 @@ oberon_check_src(oberon_context_t * ctx, oberon_expr_t * src)
 	}
 }
 
-static oberon_expr_t *
-oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t * pref)
-{
-	// Допускается:
-	//  Если классы типов равны
-	//  Если INTEGER переводится в REAL
-	//  Если STRING переводится в CHAR
-	//  Если STRING переводится в ARRAY OF CHAR
-	//  Если NIL переводится в POINTER
-	//  Если NIL переводится в PROCEDURE
-
-	oberon_check_src(ctx, expr);
-
-	bool error = false;
-	if(pref -> class != expr -> result -> class)
-	{
-		if(expr -> result -> class == OBERON_TYPE_NIL)
-		{
-			if(pref -> class != OBERON_TYPE_POINTER
-				&& pref -> class != OBERON_TYPE_PROCEDURE)
-			{
-				error = true;
-			}
-		}
-		else if(expr -> result -> class == OBERON_TYPE_STRING)
-		{
-			if(pref -> class == OBERON_TYPE_CHAR)
-			{
-				if(expr -> is_item && expr -> item.mode == MODE_STRING)
-				{
-					if(strlen(expr -> item.string) != 1)
-					{
-						error = true;
-					}
-				}
-				else
-				{
-					error = true;
-				}
-			}
-			else if(pref -> class == OBERON_TYPE_ARRAY)
-			{
-				if(pref -> base -> class != OBERON_TYPE_CHAR)
-				{
-					error = true;
-				}
-			}
-			else
-			{
-				error = true;
-			}
-		}
-		else if(expr -> result -> class == OBERON_TYPE_INTEGER)
-		{
-			if(pref -> class != OBERON_TYPE_REAL)
-			{
-				error = true;
-			}
-		}
-		else
-		{
-			error = true;
-		}
-	}
-
-	if(error)
-	{
-		oberon_error(ctx, "oberon_autocast_to: incompatible types");
-	}
-
-	if(pref -> class == OBERON_TYPE_CHAR)
-	{
-		if(expr -> result -> class == OBERON_TYPE_STRING)
-		{
-			int c = expr -> item.string[0];
-			expr = oberon_new_item(MODE_CHAR, ctx -> char_type, true);
-			expr -> item.integer = c;
-		}
-	}
-	else if(pref -> class == OBERON_TYPE_INTEGER || pref -> class == OBERON_TYPE_REAL)
-	{
-		if(expr -> result -> size > pref -> size)
-		{
-			oberon_error(ctx, "incompatible size");
-		}
-		else
-		{
-			expr = oberon_cast_expr(ctx, expr, pref);
-		}
-	}
-	else if(pref -> class == OBERON_TYPE_RECORD)
-	{
-		oberon_check_record_compatibility(ctx, expr -> result, pref);
-		expr = oberno_make_record_cast(ctx, expr, pref);
-	}
-	else if(pref -> class == OBERON_TYPE_POINTER)
-	{
-		assert(pref -> base);
-		if(expr -> result -> class == OBERON_TYPE_NIL)
-		{
-			// do nothing
-		}
-		else if(expr -> result -> base -> class == OBERON_TYPE_RECORD)
-		{
-			oberon_check_record_compatibility(ctx, expr -> result, pref);
-			expr = oberno_make_record_cast(ctx, expr, pref);
-		}
-		else if(expr -> result -> base != pref -> base)
-		{
-			oberon_error(ctx, "incompatible pointer types");
-		}
-	}
-
-	return expr;
-}
-
-static void
-oberon_autocast_binary_op(oberon_context_t * ctx, oberon_expr_t ** ea, oberon_expr_t ** eb)
-{
-	oberon_type_t * a = (*ea) -> result;
-	oberon_type_t * b = (*eb) -> result;
-	oberon_type_t * preq = oberon_get_equal_expr_type(ctx, a, b);
-	*ea = oberon_autocast_to(ctx, *ea, preq);
-	*eb = oberon_autocast_to(ctx, *eb, preq);
-}
-
 static void
 oberon_autocast_call(oberon_context_t * ctx, oberon_item_t * desig)
 {
@@ -1243,19 +983,21 @@ oberon_autocast_call(oberon_context_t * ctx, oberon_item_t * desig)
 	{
 		if(param -> class == OBERON_CLASS_VAR_PARAM)
 		{
-			if(arg -> result != param -> type)
+			oberon_check_dst(ctx, arg);
+			if(!oberon_is_compatible_arrays(param, arg))
 			{
-				oberon_error(ctx, "incompatible type");
+				oberon_check_compatible_var_param(ctx, param -> type, arg -> result);
 			}
-			if(arg -> read_only)
-			{
-				oberon_error(ctx, "assign to read-only var");
-			}
-			casted[i] = arg;
+			casted[i] = oberon_cast_expr(ctx, arg, param -> type);
 		}
 		else
 		{
-			casted[i] = oberon_autocast_to(ctx, arg, param -> type);
+			oberon_check_src(ctx, arg);
+			if(!oberon_is_compatible_arrays(param, arg))
+			{
+				oberon_check_assignment_compatible(ctx, arg, param -> type);
+			}
+			casted[i] = oberon_cast_expr(ctx, arg, param -> type);
 		}
 
 		arg = arg -> next;
@@ -1453,7 +1195,7 @@ oberon_make_record_selector(oberon_context_t * ctx, oberon_expr_t * expr, char *
 		}
 	}
 
-	int read_only = 0;
+	int read_only = expr -> read_only;
 	if(field -> read_only)
 	{
 		if(field -> module != ctx -> mod)
@@ -1578,6 +1320,7 @@ oberon_designator(oberon_context_t * ctx)
 {
 	char * name;
 	oberon_expr_t * expr;
+	oberon_object_t * objtype;
 
 	expr = oberon_qualident_expr(ctx);
 
@@ -1609,13 +1352,10 @@ oberon_designator(oberon_context_t * ctx)
 				break;
 			case LPAREN:
 				oberon_assert_token(ctx, LPAREN);
-				oberon_object_t * objtype = oberon_qualident(ctx, NULL, 1);
-				if(objtype -> class != OBERON_CLASS_TYPE)
-				{
-					oberon_error(ctx, "must be type");
-				}
+				objtype = oberon_qualident(ctx, NULL, true);
 				oberon_assert_token(ctx, RPAREN);
-				expr = oberno_make_record_cast(ctx, expr, objtype -> type);
+				oberon_check_extension_of(ctx, expr -> result, objtype -> type);
+				expr = oberon_cast_expr(ctx, expr, objtype -> type);
 				break;
 			default:
 				oberon_error(ctx, "oberon_designator: wat");
@@ -1714,6 +1454,7 @@ oberon_element(oberon_context_t * ctx)
 	oberon_expr_t * e2;
 
 	e1 = oberon_expr(ctx);
+	oberon_check_src(ctx, e1);
 	if(e1 -> result -> class != OBERON_TYPE_INTEGER)
 	{
 		oberon_error(ctx, "expected integer");
@@ -1724,6 +1465,7 @@ oberon_element(oberon_context_t * ctx)
 	{
 		oberon_assert_token(ctx, DOTDOT);
 		e2 = oberon_expr(ctx);
+		oberon_check_src(ctx, e2);
 		if(e2 -> result -> class != OBERON_TYPE_INTEGER)
 		{
 			oberon_error(ctx, "expected integer");
@@ -1827,122 +1569,34 @@ oberon_factor(oberon_context_t * ctx)
 	return expr;
 }
 
-#define ITMAKESBOOLEAN(x) \
-	(((x) >= EQUAL && (x) <= GEQ) || ((x) == OR) || ((x) == AND))
-
-#define ITUSEONLYINTEGER(x) \
-	((x) >= LESS && (x) <= GEQ)
-
-#define ITUSEONLYBOOLEAN(x) \
-	(((x) == OR) || ((x) == AND))
-
-static void
-oberon_autocast_to_real(oberon_context_t * ctx, oberon_expr_t ** e)
-{
-	oberon_expr_t * expr = *e;
-	if(expr -> result -> class == OBERON_TYPE_INTEGER)
-	{
-		if(expr -> result -> size <= ctx -> real_type -> size)
-		{
-			*e = oberon_cast_expr(ctx, expr, ctx -> real_type);
-		}
-		else
-		{
-			*e = oberon_cast_expr(ctx, expr, ctx -> longreal_type);
-		}
-	}
-	else if(expr -> result -> class != OBERON_TYPE_REAL)
-	{
-		oberon_error(ctx, "required numeric type");
-	}
-}
-
 static oberon_expr_t *
 oberon_make_bin_op(oberon_context_t * ctx, int token, oberon_expr_t * a, oberon_expr_t * b)
 {
 	oberon_expr_t * expr;
 	oberon_type_t * result;
 
+	oberon_check_compatible_bin_expr_types(ctx, token, a -> result, b -> result);
+	oberon_check_src(ctx, a);
+	if(token != IS)
+	{
+		oberon_check_src(ctx, b);
+	}
+
 	bool error = false;
 	if(token == IN)
 	{
-		if(a -> result -> class != OBERON_TYPE_INTEGER)
-		{
-			oberon_error(ctx, "must be integer");
-		}
-
-		if(b -> result -> class != OBERON_TYPE_SET)
-		{
-			oberon_error(ctx, "must be set");
-		}
-
-		result = ctx -> bool_type;
-		expr = oberon_new_operator(OP_IN, result, a, b);
+		expr = oberon_new_operator(OP_IN, ctx -> bool_type, a, b);
 	}
 	else if(token == IS)
 	{
-		oberon_type_t * v = a -> result;
-		if(v -> class == OBERON_TYPE_POINTER)
-		{
-			v = v -> base;
-			if(v -> class != OBERON_TYPE_RECORD)
-			{
-				oberon_error(ctx, "must be record");
-			}
-		}
-		else if(v -> class != OBERON_TYPE_RECORD)
-		{
-			oberon_error(ctx, "must be record");
-		}		
-
-		if(b -> is_item == false || b -> item.mode != MODE_TYPE)
-		{
-			oberon_error(ctx, "requires type");
-		}
-
-		oberon_type_t * t = b -> result;
-		if(t -> class == OBERON_TYPE_POINTER)
-		{
-			t = t -> base;
-			if(t -> class != OBERON_TYPE_RECORD)
-			{
-				oberon_error(ctx, "must be record");
-			}
-		}
-		else if(t -> class != OBERON_TYPE_RECORD)
-		{
-			oberon_error(ctx, "must be record");
-		}
-
-		result = ctx -> bool_type;
-		expr = oberon_new_operator(OP_IS, result, a, b);
+		oberon_check_type_expr(ctx, b);
+		expr = oberon_new_operator(OP_IS, ctx -> bool_type, a, b);
 	}
-	else if(ITMAKESBOOLEAN(token))
+	else if((token >= EQUAL && token <= GEQ) || token == OR || token == AND)
 	{
-		if(ITUSEONLYINTEGER(token))
-		{
-			if(a -> result -> class == OBERON_TYPE_INTEGER
-				|| b -> result -> class == OBERON_TYPE_INTEGER
-				|| a -> result -> class == OBERON_TYPE_REAL
-				|| b -> result -> class == OBERON_TYPE_REAL)
-			{
-				// accept
-			}
-			else
-			{
-				oberon_error(ctx, "used only with numeric types");
-			}
-		}
-		else if(ITUSEONLYBOOLEAN(token))
-		{
-			if(a -> result -> class != OBERON_TYPE_BOOLEAN
-				|| b -> result -> class != OBERON_TYPE_BOOLEAN)
-			{
-				oberon_error(ctx, "used only with boolean type");
-			}
-		}
-
-		oberon_autocast_binary_op(ctx, &a, &b);
+		result = oberon_get_longer_type(ctx, a -> result, b -> result);
+		a = oberon_cast_expr(ctx, a, result);
+		b = oberon_cast_expr(ctx, b, result);
 		result = ctx -> bool_type;
 
 		if(token == EQUAL)
@@ -1984,38 +1638,34 @@ oberon_make_bin_op(oberon_context_t * ctx, int token, oberon_expr_t * a, oberon_
 	}
 	else if(token == SLASH)
 	{
-		if(a -> result -> class == OBERON_TYPE_SET
-			|| b -> result -> class == OBERON_TYPE_SET)
+		if(oberon_is_set_type(a -> result) && oberon_is_set_type(b -> result))
 		{
-			oberon_autocast_binary_op(ctx, &a, &b);
-			result = a -> result;
+			result = oberon_get_longer_type(ctx, a -> result, b -> result);
+			a = oberon_cast_expr(ctx, a, result);
+			b = oberon_cast_expr(ctx, b, result);
 			expr = oberon_new_operator(OP_SYM_DIFFERENCE, result, a, b);
 		}
 		else
 		{
-			oberon_autocast_to_real(ctx, &a);
-			oberon_autocast_to_real(ctx, &b);
-			oberon_autocast_binary_op(ctx, &a, &b);
-			result = a -> result;
+			result = oberon_get_longer_real_type(ctx, a -> result, b -> result);
+			a = oberon_cast_expr(ctx, a, result);
+			b = oberon_cast_expr(ctx, b, result);
 			expr = oberon_new_operator(OP_DIV, result, a, b);
 		}
 	}
 	else if(token == DIV)
 	{
-		if(a -> result -> class != OBERON_TYPE_INTEGER
-			|| b -> result -> class != OBERON_TYPE_INTEGER)
-		{
-			oberon_error(ctx, "operator DIV requires integer type");
-		}
-
-		oberon_autocast_binary_op(ctx, &a, &b);
-		expr = oberon_new_operator(OP_DIV, a -> result, a, b);
+		result = oberon_get_longer_type(ctx, a -> result, b -> result);
+		a = oberon_cast_expr(ctx, a, result);
+		b = oberon_cast_expr(ctx, b, result);
+		expr = oberon_new_operator(OP_DIV, result, a, b);
 	}
 	else
 	{
-		oberon_autocast_binary_op(ctx, &a, &b);
-		result = a -> result;
-		if(result -> class == OBERON_TYPE_SET)
+		result = oberon_get_longer_type(ctx, a -> result, b -> result);
+		a = oberon_cast_expr(ctx, a, result);
+		b = oberon_cast_expr(ctx, b, result);
+		if(oberon_is_set_type(result))
 		{
 			switch(token)
 			{
@@ -2033,8 +1683,7 @@ oberon_make_bin_op(oberon_context_t * ctx, int token, oberon_expr_t * a, oberon_
 					break;
 			}
 		}
-		else if(result -> class == OBERON_TYPE_INTEGER
-			|| result -> class == OBERON_TYPE_REAL)
+		else if(oberon_is_number_type(result))
 		{
 			switch(token)
 			{
@@ -2348,6 +1997,11 @@ oberon_formal_pars(oberon_context_t * ctx, oberon_type_t * signature)
 		{
 			oberon_error(ctx, "function result is not type");
 		}
+		if(typeobj -> type -> class == OBERON_TYPE_RECORD
+			|| typeobj -> type -> class == OBERON_TYPE_ARRAY)
+		{
+			oberon_error(ctx, "records or arrays could not be result of function");
+		}
 		signature -> base = typeobj -> type;
 	}
 }
@@ -2416,7 +2070,9 @@ oberon_make_return(oberon_context_t * ctx, oberon_expr_t * expr)
 			oberon_error(ctx, "procedure requires expression on result");
 		}
 
-		expr = oberon_autocast_to(ctx, expr, result_type);
+		oberon_check_src(ctx, expr);
+		oberon_check_assignment_compatible(ctx, expr, result_type);
+		expr = oberon_cast_expr(ctx, expr, result_type);
 	}
 
 	proc -> has_return = 1;
@@ -3226,14 +2882,19 @@ oberon_statement_seq(oberon_context_t * ctx);
 static void
 oberon_assign(oberon_context_t * ctx, oberon_expr_t * src, oberon_expr_t * dst)
 {
-	if(dst -> read_only)
+	oberon_check_dst(ctx, dst);
+	oberon_check_assignment_compatible(ctx, src, dst -> result);
+
+	if(oberon_is_string_type(src -> result))
 	{
-		oberon_error(ctx, "read-only destination");
+		src -> next = dst;
+		oberon_make_copy_call(ctx, 2, src);
+	}
+	else
+	{
+		src = oberon_cast_expr(ctx, src, dst -> result);
+		oberon_generate_assign(ctx, src, dst);
 	}
-
-	oberon_check_dst(ctx, dst);
-	src = oberon_autocast_to(ctx, src, dst -> result);
-	oberon_generate_assign(ctx, src, dst);
 }
 
 static oberon_expr_t *
@@ -3245,14 +2906,12 @@ oberon_case_labels(oberon_context_t * ctx, oberon_expr_t * val)
 	oberon_expr_t * cond2;
 
 	e1 = (oberon_expr_t *) oberon_const_expr(ctx);
-	oberon_autocast_to(ctx, e1, val -> result);
 	
 	e2 = NULL;
 	if(ctx -> token == DOTDOT)
 	{
 		oberon_assert_token(ctx, DOTDOT);
 		e2 = (oberon_expr_t *) oberon_const_expr(ctx);
-		oberon_autocast_to(ctx, e2, val -> result);
 	}
 
 	if(e2 == NULL)
@@ -3326,6 +2985,10 @@ oberon_case_statement(oberon_context_t * ctx)
 		oberon_assert_token(ctx, ELSE);
 		oberon_statement_seq(ctx);
 	}
+	else
+	{
+		oberon_generate_trap(ctx, -1);
+	}
 
 	oberon_generate_label(ctx, end);
 	oberon_assert_token(ctx, END);
@@ -3355,7 +3018,8 @@ oberon_with_guard_do(oberon_context_t * ctx, gen_label_t * end)
 
 	/* Сохраняем ссылку во временной переменной */
 	val = oberon_make_temp_var_item(ctx, type -> result);
-	cast = oberno_make_record_cast(ctx, var, type -> result);
+	//cast = oberno_make_record_cast(ctx, var, type -> result);
+	cast = oberon_cast_expr(ctx, var, type -> result);
 	oberon_assign(ctx, cast, val);
 	/* Подменяем тип у оригинальной переменной */
 	old_type = var -> item.var -> type;
@@ -3392,6 +3056,10 @@ oberon_with_statement(oberon_context_t * ctx)
 		oberon_assert_token(ctx, ELSE);
 		oberon_statement_seq(ctx);
 	}
+	else
+	{
+		oberon_generate_trap(ctx, -2);
+	}
 
 	oberon_generate_label(ctx, end);
 	oberon_assert_token(ctx, END);
@@ -3532,11 +3200,11 @@ oberon_statement(oberon_context_t * ctx)
 		index = oberon_ident_item(ctx, iname);
 		oberon_assert_token(ctx, ASSIGN);
 		from = oberon_expr(ctx);
-		oberon_assign(ctx, from, index);
 		oberon_assert_token(ctx, TO);
 		bound = oberon_make_temp_var_item(ctx, index -> result);
 		to = oberon_expr(ctx);
-		oberon_assign(ctx, to, bound);
+		oberon_assign(ctx, to, bound); // сначала temp
+		oberon_assign(ctx, from, index); // потом i
 		if(ctx -> token == BY)
 		{
 			oberon_assert_token(ctx, BY);
@@ -3955,7 +3623,6 @@ oberon_make_new_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
 		oberon_error(ctx, "too few arguments");
 	}
 
-
 	oberon_expr_t * dst;
 	dst = list_args;
 	oberon_check_dst(ctx, dst);
@@ -4031,6 +3698,110 @@ oberon_make_new_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
 	oberon_assign(ctx, src, dst);
 }
 
+static void
+oberon_make_copy_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+	if(num_args < 2)
+	{
+		oberon_error(ctx, "too few arguments");
+	}
+
+	if(num_args > 2)
+	{
+		oberon_error(ctx, "too mach arguments");
+	}
+
+	oberon_expr_t * src;
+	src = list_args;
+	oberon_check_src(ctx, src);
+
+	oberon_expr_t * dst;
+	dst = list_args -> next;
+	oberon_check_dst(ctx, dst);
+
+	if(!oberon_is_string_type(src -> result) && !oberon_is_array_of_char_type(src -> result))
+	{
+		oberon_error(ctx, "source must be string or array of char");
+	}
+
+	if(!oberon_is_array_of_char_type(dst -> result))
+	{
+		oberon_error(ctx, "dst must be array of char");
+	}
+
+	oberon_generate_copy(ctx, src, dst);
+}
+
+static void
+oberon_make_assert_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+	if(num_args < 1)
+	{
+		oberon_error(ctx, "too few arguments");
+	}
+
+	if(num_args > 2)
+	{
+		oberon_error(ctx, "too mach arguments");
+	}
+
+	oberon_expr_t * cond;
+	cond = list_args;
+	oberon_check_src(ctx, cond);
+
+	if(cond -> result -> class != OBERON_TYPE_BOOLEAN)
+	{
+		oberon_error(ctx, "expected boolean");
+	}
+
+	if(num_args == 1)
+	{
+		oberon_generate_assert(ctx, cond);
+	}
+	else
+	{
+		oberon_expr_t * num;
+		num = list_args -> next;
+		oberon_check_src(ctx, num);
+
+		if(num -> result -> class != OBERON_TYPE_INTEGER)
+		{
+			oberon_error(ctx, "expected integer");
+		}
+
+		oberon_check_const(ctx, num);
+
+		oberon_generate_assert_n(ctx, cond, num -> item.integer);
+	}
+}
+
+static void
+oberon_make_halt_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_args)
+{
+	if(num_args < 1)
+	{
+		oberon_error(ctx, "too few arguments");
+	}
+
+	if(num_args > 1)
+	{
+		oberon_error(ctx, "too mach arguments");
+	}
+
+	oberon_expr_t * num;
+	num = list_args;
+	oberon_check_src(ctx, num);
+
+	if(num -> result -> class != OBERON_TYPE_INTEGER)
+	{
+		oberon_error(ctx, "expected integer");
+	}
+
+	oberon_check_const(ctx, num);
+
+	oberon_generate_halt(ctx, num -> item.integer);
+}
+
 static void
 oberon_new_const(oberon_context_t * ctx, char * name, oberon_expr_t * expr)
 {
@@ -4067,6 +3838,9 @@ oberon_create_context(ModuleImportCallback import_module)
 
 	/* Procedures */
 	oberon_new_intrinsic(ctx, "NEW", NULL, oberon_make_new_call);
+	oberon_new_intrinsic(ctx, "COPY", NULL, oberon_make_copy_call);
+	oberon_new_intrinsic(ctx, "ASSERT", NULL, oberon_make_assert_call);
+	oberon_new_intrinsic(ctx, "HALT", NULL, oberon_make_halt_call);
 
 	return ctx;
 }