switch expression - add compile errors

   * for duplicate integer value
   * for missing integer values
   * for missing else prong

see #43

1 files changed, 30 insertions, 0 deletions

diff --git a/src/range_set.hpp b/src/range_set.hpp
new file mode 100644
index 0000000000..f3ae4a189f
--- /dev/null
+++ b/src/range_set.hpp
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2017 Andrew Kelley
+ *
+ * This file is part of zig, which is MIT licensed.
+ * See http://opensource.org/licenses/MIT
+ */
+
+#ifndef ZIG_RANGE_SET_HPP
+#define ZIG_RANGE_SET_HPP
+
+#include "all_types.hpp"
+
+struct Range {
+    BigNum first;
+    BigNum last;
+};
+
+struct RangeWithSrc {
+    Range range;
+    AstNode *source_node;
+};
+
+struct RangeSet {
+    ZigList<RangeWithSrc> src_range_list;
+};
+
+AstNode *rangeset_add_range(RangeSet *rs, BigNum *first, BigNum *last, AstNode *source_node);
+bool rangeset_spans(RangeSet *rs, BigNum *first, BigNum *last);
+
+#endif