cstring_view -> CStringView

1 files changed, 30 insertions, 0 deletions

diff --git a/toolsrc/include/CStringView.h b/toolsrc/include/CStringView.h
new file mode 100644
index 000000000..3da76e63f
--- /dev/null
+++ b/toolsrc/include/CStringView.h
@@ -0,0 +1,30 @@
+#pragma once
+#include <string>
+
+namespace vcpkg
+{
+    template<class CharType>
+    struct BasicCStringView
+    {
+        constexpr BasicCStringView() : cstr(nullptr) {}
+        constexpr BasicCStringView(const CharType* cstr) : cstr(cstr) {}
+        BasicCStringView(const std::basic_string<CharType>& str) : cstr(str.c_str()) {}
+
+        constexpr operator const CharType*() const { return cstr; }
+
+        constexpr const CharType* c_str() const { return cstr; }
+
+    private:
+        const CharType* cstr;
+    };
+
+    using CStringView = BasicCStringView<char>;
+    using CWStringView = BasicCStringView<wchar_t>;
+
+    inline const char* to_printf_arg(const CStringView spec) { return spec.c_str(); }
+
+    inline const wchar_t* to_wprintf_arg(const CWStringView spec) { return spec.c_str(); }
+
+    static_assert(sizeof(CStringView) == sizeof(void*), "CStringView must be a simple wrapper around char*");
+    static_assert(sizeof(CWStringView) == sizeof(void*), "CWStringView must be a simple wrapper around wchar_t*");
+}