From db03db0dca542546b3fabd3edb97e77751ca4971 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Wed, 1 Jun 2022 21:39:56 +0200
Subject: [PATCH] util/SpanCast: add FromBytesStrict()
---
src/util/SpanCast.hxx | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/src/util/SpanCast.hxx b/src/util/SpanCast.hxx
index ea2a870bb..a1bccac63 100644
--- a/src/util/SpanCast.hxx
+++ b/src/util/SpanCast.hxx
@@ -29,6 +29,7 @@
#pragma once
+#include <cassert>
#include <cstddef>
#include <span>
#include <string_view>
@@ -52,6 +53,18 @@ FromBytesFloor(std::span<CopyConst<T, std::byte>> other) noexcept
};
}
+/**
+ * Like FromBytesFloor(), but assert that rounding is not necessary.
+ */
+template<typename T>
+constexpr std::span<T>
+FromBytesStrict(std::span<CopyConst<T, std::byte>> other) noexcept
+{
+ assert(other.size() % sizeof(T) == 0);
+
+ return FromBytesFloor<T>(other);
+}
+
constexpr std::span<const char>
ToSpan(std::string_view sv) noexcept
{