[linalg] Silence clang-tidy warning in proxy_reference

Author: tobiashienzsch

include/etl/_linalg/proxy_reference.hpp

@@ -16,7 +16,7 @@ struct proxy_reference : proxy_reference_base {
     using value_type     = Value;
     using derived_type   = Derived;
 
-    constexpr explicit proxy_reference(Reference reference)
+    constexpr explicit proxy_reference(Reference reference) // NOLINT(bugprone-crtp-constructor-accessibility)
         : _reference(reference)
     {
     }

tests/linalg/concepts.t.cpp

@@ -14,7 +14,13 @@ struct Complex {
 
 [[maybe_unused]] static auto real(Complex c) -> float { return c.real; }
 [[maybe_unused]] static auto imag(Complex c) -> float { return c.imag; }
-[[maybe_unused]] static auto conj(Complex c) -> Complex { return {real(c), -imag(c)}; }
+[[maybe_unused]] static auto conj(Complex c) -> Complex
+{
+    return {
+        .real = real(c),
+        .imag = -imag(c),
+    };
+}
 
 struct String { };