X-Git-Url: http://deadsoftware.ru/gitweb?p=dsw-obn.git;a=blobdiff_plain;f=src%2Foberon.c;h=b428ecf73f6bda15c85365a8d49a5dd6aafb45ad;hp=f2c901433aeb49363ef01007ed8336a1e5db1919;hb=e9b64944925eadc5022edfee26281a4814fd9124;hpb=ffca530414fc4c94c3d95b9bc52f4d0cee3326e9

diff --git a/src/oberon.c b/src/oberon.c
index f2c9014..b428ecf 100644
--- a/src/oberon.c
+++ b/src/oberon.c
@@ -64,7 +64,8 @@ enum {
 	STRING,
 	IF,
 	THEN,
-	ELSE
+	ELSE,
+	ELSIF
 };
 
 // =======================================================================
@@ -395,6 +396,10 @@ oberon_read_ident(oberon_context_t * ctx)
 	{
 		ctx -> token = ELSE;
 	}
+	else if(strcmp(ident, "ELSIF") == 0)
+	{
+		ctx -> token = ELSIF;
+	}
 }
 
 static void
@@ -2918,8 +2923,25 @@ oberon_statement(oberon_context_t * ctx)
 		oberon_generate_branch(ctx, cond, false, els);
 		oberon_statement_seq(ctx);
 		oberon_generate_goto(ctx, end);
-
 		oberon_generate_label(ctx, els);
+
+		while(ctx -> token == ELSIF)
+		{
+			els = oberon_generator_reserve_label(ctx);
+
+			oberon_assert_token(ctx, ELSIF);
+			cond = oberon_expr(ctx);
+			if(cond -> result -> class != OBERON_TYPE_BOOLEAN)
+			{
+				oberon_error(ctx, "condition must be boolean");
+			}
+			oberon_assert_token(ctx, THEN);
+			oberon_generate_branch(ctx, cond, false, els);
+			oberon_statement_seq(ctx);
+			oberon_generate_goto(ctx, end);
+			oberon_generate_label(ctx, els);
+		}
+
 		if(ctx -> token == ELSE)
 		{
 			oberon_assert_token(ctx, ELSE);