---
src/util/macros.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/src/util/macros.h b/src/util/macros.h
index 40ebf02..77055e8 100644
--- a/src/util/macros.h
+++ b/src/util/macros.h
@@ -75,6 +75,19 @@ do { \
#define unreachable(str)
#endif
+/**
+ * Assume macro. Useful for expressing our assumptions to the compiler,
+ * typically for purposes of silencing warnings.
+ */
+#ifdef HAVE___BUILTIN_UNREACHABLE
+#define assume(expr) ((expr) ? (void)0 : assert(!"assumption failed"), \
+ __builtin_unreachable())
+#elif _MSC_VER >= 1200
+#define assume(expr) __assume(expr)
+#else
+#define assume(expr) assert(expr)
+#endif
+
#ifdef HAVE_FUNC_ATTRIBUTE_FLATTEN
#define FLATTEN __attribute__((__flatten__))
#else
--
1.8.5.5
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