scc

commit 5e36187eb6fac0a74254d40302033d0f043f8e72
parent d7f2425b01e1c9643b82d5c565d73a0aee04384c
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Tue, 28 Aug 2012 20:41:27 +0200

Added tree structure for break statement

Diffstat:
M
flow.c
 | 
12
+++++++++++-
M
syntax.h
 | 
2
+-
M
tree.c
 | 
3
++-

3 files changed, 14 insertions(+), 3 deletions(-)
diff --git a/flow.c b/flow.c
@@ -149,6 +149,16 @@ label(void)
 }
 
 static struct node *
+_break(void)
+{
+	expect(BREAK);
+	expect(';');
+	if (blockp == blocks)
+		error("break statement not within loop or switch");
+	return node1(OBREAK, NULL);
+}
+
+static struct node *
 stmt(void)
 {
 	register struct node *np;
@@ -161,7 +171,7 @@ stmt(void)
 	case DO:       return _do();
 	case WHILE:    return _while();
 	case CONTINUE:
-	case BREAK:
+	case BREAK:    return _break();
 	case RETURN:
 	case GOTO:     return _goto();
 	case CASE:     /* TODO */
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
+	OFEXP, ODO, OWHILE, OLABEL, OGOTO, OBREAK,
 };
 
 struct node;
diff --git a/tree.c b/tree.c
@@ -184,7 +184,8 @@ prtree_helper(register struct node *np)
 		[ODO] = {2, "do"},
 		[OWHILE] = {2, "while"},
 		[OLABEL] = {2, "label"},
-		[OGOTO] = {1, "goto"}
+		[OGOTO] = {1, "goto"},
+		[OBREAK] = {1, "break"},
 	};
 	if (!np) {
 		fputs(" nil", stdout);