scc

commit a8acad8243a648e895baebf39b5672b8209a30c6
parent 5e36187eb6fac0a74254d40302033d0f043f8e72
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Tue, 28 Aug 2012 20:43:56 +0200

Added tree structure for continue

Diffstat:
M
flow.c
 | 
18
+++++++++++++++++-
M
syntax.h
 | 
2
+-
M
tree.c
 | 
1
+

3 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/flow.c b/flow.c
@@ -159,6 +159,22 @@ _break(void)
 }
 
 static struct node *
+_continue(void)
+{
+	register unsigned char *bp;
+
+	expect(CONTINUE);
+	expect(';');
+
+	for (bp = blocks; bp < blockp && *bp == OSWITCH; ++bp)
+		; /* nothing */
+	if (bp == blockp)
+		error("continue statement not within loop");
+
+	return node1(OCONT, NULL);
+}
+
+static struct node *
 stmt(void)
 {
 	register struct node *np;
@@ -170,7 +186,7 @@ stmt(void)
 	case FOR:      return _for();
 	case DO:       return _do();
 	case WHILE:    return _while();
-	case CONTINUE:
+	case CONTINUE: return _continue();
 	case BREAK:    return _break();
 	case RETURN:
 	case GOTO:     return _goto();
diff --git a/syntax.h b/syntax.h
@@ -11,7 +11,7 @@ enum opcode {
 	OBOR, OAND, OOR, OTERN, OASSIGN, OA_MUL, OA_DIV,
 	OA_MOD, OA_ADD, OA_SUB, OA_SHL, OA_SHR, OA_AND,
 	OA_XOR, OA_OR, OSYM, OCOMP, OSWITCH, OIF, OFOR,
-	OFEXP, ODO, OWHILE, OLABEL, OGOTO, OBREAK,
+	OFEXP, ODO, OWHILE, OLABEL, OGOTO, OBREAK, OCONT
 };
 
 struct node;
diff --git a/tree.c b/tree.c
@@ -186,6 +186,7 @@ prtree_helper(register struct node *np)
 		[OLABEL] = {2, "label"},
 		[OGOTO] = {1, "goto"},
 		[OBREAK] = {1, "break"},
+		[OCONT] = {1, "cont"},
 	};
 	if (!np) {
 		fputs(" nil", stdout);