X-Git-Url: http://deadsoftware.ru/gitweb?a=blobdiff_plain;f=oberon.c;h=dab60b0bb151dce64579a099f2aa59f5722a2eb6;hb=12ae486a18746b042fcc4ebbefc5449d4d3464af;hp=b56a458a6c1e979a743c9d4139b5df3044f1cdc3;hpb=89dfaf94ddbbc501020554232ce026b6584e8045;p=dsw-obn.git

diff --git a/oberon.c b/oberon.c
index b56a458..dab60b0 100644
--- a/oberon.c
+++ b/oberon.c
@@ -228,8 +228,11 @@ oberon_define_type(oberon_scope_t * scope, char * name, oberon_type_t * type, in
 static void
 oberon_get_char(oberon_context_t * ctx)
 {
-	ctx -> code_index += 1;
-	ctx -> c = ctx -> code[ctx -> code_index];
+	if(ctx -> code[ctx -> code_index])
+	{
+		ctx -> code_index += 1;
+		ctx -> c = ctx -> code[ctx -> code_index];
+	}
 }
 
 static void
@@ -379,6 +382,43 @@ oberon_skip_space(oberon_context_t * ctx)
 	}
 }
 
+static void
+oberon_read_comment(oberon_context_t * ctx)
+{
+	int nesting = 1;
+	while(nesting >= 1)
+	{
+		if(ctx -> c == '(')
+		{
+			oberon_get_char(ctx);
+			if(ctx -> c == '*')
+			{
+				oberon_get_char(ctx);
+				nesting += 1;
+			}
+		}
+		else if(ctx -> c == '*')
+		{
+			oberon_get_char(ctx);
+			if(ctx -> c == ')')
+			{
+				oberon_get_char(ctx);
+				nesting -= 1;
+			}
+		}
+		else if(ctx -> c == 0)
+		{
+			oberon_error(ctx, "unterminated comment");
+		}
+		else
+		{
+			oberon_get_char(ctx);
+		}
+	}
+}
+
+static void oberon_read_token(oberon_context_t * ctx);
+
 static void
 oberon_read_symbol(oberon_context_t * ctx)
 {
@@ -408,6 +448,12 @@ oberon_read_symbol(oberon_context_t * ctx)
 		case '(':
 			ctx -> token = LPAREN;
 			oberon_get_char(ctx);
+			if(ctx -> c == '*')
+			{
+				oberon_get_char(ctx);
+				oberon_read_comment(ctx);
+				oberon_read_token(ctx);
+			}
 			break;
 		case ')':
 			ctx -> token = RPAREN;
@@ -450,6 +496,11 @@ oberon_read_symbol(oberon_context_t * ctx)
 		case '*':
 			ctx -> token = STAR;
 			oberon_get_char(ctx);
+			if(ctx -> c == ')')
+			{
+				oberon_get_char(ctx);
+				oberon_error(ctx, "unstarted comment");
+			}
 			break;
 		case '/':
 			ctx -> token = SLASH;
@@ -480,7 +531,7 @@ oberon_read_symbol(oberon_context_t * ctx)
 			oberon_get_char(ctx);
 			break;
 		default:
-			oberon_error(ctx, "invalid char");
+			oberon_error(ctx, "invalid char %c", ctx -> c);
 			break;
 	}
 }
@@ -614,7 +665,13 @@ oberon_autocast_to(oberon_context_t * ctx, oberon_expr_t * expr, oberon_type_t *
 {
 	if(pref -> class != expr -> result -> class)
 	{
-		oberon_error(ctx, "incompatible types");
+		if(pref -> class != OBERON_TYPE_PROCEDURE)
+		{
+			if(expr -> result -> class != OBERON_TYPE_POINTER)
+			{
+				oberon_error(ctx, "incompatible types");
+			}
+		}
 	}
 
 	if(pref -> class == OBERON_TYPE_INTEGER)
@@ -685,21 +742,26 @@ oberon_autocast_call(oberon_context_t * ctx, oberon_expr_t * desig)
 	{
 		if(param -> class == OBERON_CLASS_VAR_PARAM)
 		{
-			if(arg -> is_item)
+			if(arg -> read_only)
 			{
-				switch(arg -> item.mode)
-				{
-					case MODE_VAR:
-					case MODE_INDEX:
-					case MODE_FIELD:
-					// Допустимо разыменование?
-					//case MODE_DEREF:
-						break;
-					default:
-						oberon_error(ctx, "var-parameter accept only variables");
-						break;
-				}
+				oberon_error(ctx, "assign to read-only var");
 			}
+
+			//if(arg -> is_item)
+			//{
+			//	switch(arg -> item.mode)
+			//	{
+			//		case MODE_VAR:
+			//		case MODE_INDEX:
+			//		case MODE_FIELD:
+			//		// Допустимо разыменование?
+			//		//case MODE_DEREF:
+			//			break;
+			//		default:
+			//			oberon_error(ctx, "var-parameter accept only variables");
+			//			break;
+			//	}
+			//}
 		}
 		oberon_autocast_to(ctx, arg, param -> type);
 		arg = arg -> next;
@@ -2513,6 +2575,71 @@ oberon_make_abs_call(oberon_context_t * ctx, int num_args, oberon_expr_t * list_
 	return expr;
 }
 
+static void
+oberon_make_new_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 * dst;
+	dst = list_args;
+
+	oberon_type_t * type;
+	type = dst -> result;
+
+	if(type -> class != OBERON_TYPE_POINTER)
+	{
+		oberon_error(ctx, "not a pointer");
+	}
+
+	type = type -> base;
+
+	oberon_expr_t * src;
+	src = oberon_new_item(MODE_NEW, dst -> result, 0);
+	src -> item.num_args = 0;
+	src -> item.args = NULL;
+
+	if(type -> class == OBERON_TYPE_ARRAY)
+	{
+		// Пригодится при работе с открытыми массивами
+		/*
+		int dim = 1;
+		oberon_expr_t * sizes = NULL;
+		oberon_expr_t * last_size = NULL;
+		sizes = last_size = oberon_new_item(MODE_INTEGER, ctx -> int_type, 1);
+		sizes -> item.integer = type -> size;
+		oberon_type_t * base = type -> base;
+		while(base -> class == OBERON_TYPE_ARRAY)
+		{
+			oberon_expr_t * size;
+			size = last_size = oberon_new_item(MODE_INTEGER, ctx -> int_type, 1);
+			size -> item.integer = base -> size;
+
+			last_size -> next = size;
+			last_size = size;
+			base = base -> base;
+			dim += 1;
+		}
+		*/
+
+		src -> item.num_args = 0;
+		src -> item.args = NULL;
+	}
+	else if(type -> class != OBERON_TYPE_RECORD)
+	{
+		oberon_error(ctx, "oberon_make_new_call: wat");
+	}
+
+	oberon_assign(ctx, src, dst);
+}
+
 oberon_context_t *
 oberon_create_context(ModuleImportCallback import_module)
 {
@@ -2528,6 +2655,7 @@ oberon_create_context(ModuleImportCallback import_module)
 
 	register_default_types(ctx);
 	oberon_new_intrinsic(ctx, "ABS", oberon_make_abs_call, NULL);
+	oberon_new_intrinsic(ctx, "NEW", NULL, oberon_make_new_call);
 
 	return ctx;
 }