Richard Smith c32d261e27 Don't diagnose a redeclaration of a deduction guide if the prior
declaration is not visible.

In passing, add a test for a similar case of conflicting redeclarations
of internal-linkage structured bindings. (This case already works).
2020-06-12 10:29:01 -07:00

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// RUN: rm -rf %t
// RUN: %clang_cc1 -x c++ -std=c++20 -fmodules-cache-path=%t -fmodules -fimplicit-module-maps -I %S/Inputs/cxx20 %s -verify -fno-modules-error-recovery
// expected-no-diagnostics
#include "decls.h"
namespace StructuredBinding {
struct R { int x, y; };
static auto [a, b] = R();
}